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1<?xml version='1.0' encoding='UTF-8'?> 1<?xml version='1.0' encoding='UTF-8'?>
2<!DOCTYPE sections SYSTEM "/dtd/book.dtd"> 2<!DOCTYPE sections SYSTEM "/dtd/book.dtd">
3 3
4<!-- The content of this document is licensed under the CC-BY-SA license --> 4<!-- The content of this document is licensed under the CC-BY-SA license -->
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6 6
7<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-ppc-disk.xml,v 1.23 2004/11/20 22:23:30 neysx Exp $ --> 7<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-ppc-disk.xml,v 1.47 2008/05/02 08:04:23 nightmorph Exp $ -->
8 8
9<sections> 9<sections>
10 10
11<version>1.19</version> 11<version>9.1</version>
12<date>2004-11-02</date> 12<date>2008-05-02</date>
13 13
14<section> 14<section>
15<title>Introduction to Block Devices</title> 15<title>Introduction to Block Devices</title>
16<subsection>
17<title>Block Devices</title>
18<body>
19 16
20<p>
21We'll take a good look at disk-oriented aspects of Gentoo Linux
22and Linux in general, including Linux filesystems, partitions and block devices.
23Then, once you're familiar with the ins and outs of disks and filesystems,
24you'll be guided through the process of setting up partitions and filesystems
25for your Gentoo Linux installation.
26</p>
27
28<p>
29To begin, we'll introduce <e>block devices</e>. The most famous block device is
30probably the one that represents the first IDE drive in a Linux system, namely
31<path>/dev/hda</path>. If your system uses SCSI drives, then your first hard
32drive would be <path>/dev/sda</path>.
33</p>
34
35<p>
36The block devices above represent an abstract interface to the disk. User
37programs can use these block devices to interact with your disk without worrying
38about whether your drives are IDE, SCSI or something else. The program can
39simply address the storage on the disk as a bunch of contiguous,
40randomly-accessible 512-byte blocks.
41</p>
42
43</body>
44</subsection> 17<subsection>
18<include href="hb-install-blockdevices.xml"/>
45<subsection> 19</subsection>
20
21<subsection>
46<title>Partitions and Slices</title> 22<title>Partitions</title>
47<body> 23<body>
48 24
49<p> 25<p>
50Although it is theoretically possible to use a full disk to house your Linux 26Although it is theoretically possible to use a full disk to house your Linux
51system, this is almost never done in practice. Instead, full disk block devices 27system, this is almost never done in practice. Instead, full disk block devices
52are split up in smaller, more manageable block devices. On most systems, 28are split up in smaller, more manageable block devices. On most systems,
53these are called <e>partitions</e>. Other architectures use a similar technique, 29these are called <e>partitions</e>.
54called <e>slices</e>.
55</p> 30</p>
56 31
57</body> 32</body>
58</subsection> 33</subsection>
59</section> 34</section>
63<title>Default Partitioning Scheme</title> 38<title>Default Partitioning Scheme</title>
64<body> 39<body>
65 40
66<p> 41<p>
67If you are not interested in drawing up a partitioning scheme for your system, 42If you are not interested in drawing up a partitioning scheme for your system,
68you can use the partitioning scheme we use throughout this book: 43you can use the partitioning scheme we use throughout this book. Choose the
44filesystem layout that best matches the type of PowerPC system you are
45installing on.
46</p>
47
48</body>
49</subsection>
50<subsection>
51<title>Apple New World</title>
52<body>
53
69</p> 54<p>
55Apple New World machines are fairly straightforward to configure. The first
56partition is always an <e>Apple Partition Map</e>. This partition keeps track
57of the layout of the disk. You cannot remove this partition. The next
58partition should always be a bootstrap partition. This partition contains a
59small (800k) HFS filesystem that holds a copy of the bootloader Yaboot and its
60configuration file. This partition is <e>not</e> the same as a
61<path>/boot</path> partition as found on other architectures. After the boot
62partition, the usual Linux filesystems are placed, according to the scheme
63below. The swap partition is a temporary storage place for when your system
64runs out of physical memory. The root partition will contain the filesystem
65that Gentoo is installed on. If you wish to dual boot, the OSX partition
66can go anywhere after the bootstrap partition to insure that yaboot starts
67first.
68</p>
69
70<note>
71There may be "Disk Driver" partitions on your disk such as
72<path>Apple_Driver63</path>, <path>Apple_Driver_ATA</path>,
73<path>Apple_FWDriver</path>, <path>Apple_Driver_IOKit</path>, and
74<path>Apple_Patches</path>. These are used to boot MacOS, so if you have no
75need for this, you can remove them by initializing the disk with mac-fdisk's
76<c>i</c> option. This will completely erase the disk! If you are in doubt,
77just let them be.
78</note>
79
80<note>
81If you partitioned this disk with Apple's Disk Utility, there may be
82128Mb spaces between partitions which Apple reserves for "future use". You
83can safely remove these.
84</note>
70 85
71<table> 86<table>
72<tr> 87<tr>
73 <th>Partition NewWorld</th>
74 <th>Partition OldWorld</th>
75 <th>Partition Pegasos</th> 88 <th>Partition</th>
89 <th>Size</th>
76 <th>Filesystem</th> 90 <th>Filesystem</th>
91 <th>Description</th>
92</tr>
93<tr>
94 <ti><path>/dev/sda1</path></ti>
95 <ti>32k</ti>
96 <ti>None</ti>
97 <ti>Apple Partition Map</ti>
98</tr>
99<tr>
100 <ti><path>/dev/sda2</path></ti>
101 <ti>800k</ti>
102 <ti>HFS</ti>
103 <ti>Apple Bootstrap</ti>
104</tr>
105<tr>
106 <ti><path>/dev/sda3</path></ti>
107 <ti>512Mb</ti>
108 <ti>Swap</ti>
109 <ti>Linux Swap</ti>
110</tr>
111<tr>
112 <ti><path>/dev/sda4</path></ti>
113 <ti>Rest of Disk</ti>
114 <ti>ext3, reiserfs, xfs</ti>
115 <ti>Linux Root</ti>
116</tr>
117</table>
118
119</body>
120</subsection>
121<subsection>
122<title>Apple Old World</title>
123<body>
124
125<p>
126Apple Old World machines are a bit more complicated to configure. The first
127partition is always an <e>Apple Partition Map</e>. This partition keeps track
128of the layout of the disk. You cannot remove this partition. If you are using
129BootX, the configuration below assumes that MacOS is installed on a seperate
130disk. If this is not the case, there will be additional partitions for "Apple
131Disk Drivers" such as <path>Apple_Driver63, Apple_Driver_ATA, Apple_FWDriver,
132Apple_Driver_IOKit, Apple_Patches</path> and the MacOS install. If you are
133using Quik, you will need to create a boot partition to hold the kernel, unlike
134other Apple boot methods. After the boot partition, the usual Linux filesystems
135are placed, according to the scheme below. The swap partition is a temporary
136storage place for when your system runs out of physical memory. The root
137partition will contain the filesystem that Gentoo is installed on.
138</p>
139
140<note>
141If you are using an OldWorld machine, you will need to keep MacOS available.
142The layout here assumes MacOS is installed on a separate drive.
143</note>
144
145<table>
146<tr>
147 <th>Partition</th>
77 <th>Size</th> 148 <th>Size</th>
149 <th>Filesystem</th>
78 <th>Description</th> 150 <th>Description</th>
79</tr> 151</tr>
80<tr> 152<tr>
81 <ti><path>/dev/hda1</path></ti> 153 <ti><path>/dev/sda1</path></ti>
82 <ti>/dev/hda1</ti>
83 <ti>(Not applicable)</ti>
84 <ti>(Partition Map)</ti>
85 <ti>32k</ti> 154 <ti>32k</ti>
155 <ti>None</ti>
86 <ti>Apple_partition_map</ti> 156 <ti>Apple Partition Map</ti>
87</tr>
88<tr> 157</tr>
158<tr>
89 <ti><path>/dev/hda2</path></ti> 159 <ti><path>/dev/sda2</path></ti>
90 <ti>(Not needed)</ti> 160 <ti>32Mb</ti>
91 <ti>(Not applicable)</ti> 161 <ti>ext2</ti>
92 <ti>(bootstrap)</ti> 162 <ti>Quik Boot Partition (quik only)</ti>
163</tr>
164<tr>
165 <ti><path>/dev/sda3</path></ti>
166 <ti>512Mb</ti>
167 <ti>Swap</ti>
168 <ti>Linux Swap</ti>
169</tr>
170<tr>
171 <ti><path>/dev/sda4</path></ti>
172 <ti>Rest of Disk</ti>
173 <ti>ext3, reiserfs, xfs</ti>
174 <ti>Linux Root</ti>
175</tr>
176</table>
177
178</body>
179</subsection>
180<subsection>
181<title>Pegasos</title>
182<body>
183
184<p>
185The Pegasos partition layout is quite simple compared to the Apple layouts.
186The first partition is a Boot Partition, which contains kernels to be booted,
187along with an Open Firmware script that presents a menu on boot. After the boot
188partition, the usual Linux filesystems are placed, according to the scheme
189below. The swap partition is a temporary storage place for when your system
190runs out of physical memory. The root partition will contain the filesystem
191that Gentoo is installed on.
192</p>
193
194<table>
195<tr>
196 <th>Partition</th>
197 <th>Size</th>
198 <th>Filesystem</th>
199 <th>Description</th>
200</tr>
201<tr>
202 <ti><path>/dev/sda1</path></ti>
203 <ti>32Mb</ti>
204 <ti>affs1 or ext2</ti>
205 <ti>Boot Partition</ti>
206</tr>
207<tr>
208 <ti><path>/dev/sda2</path></ti>
209 <ti>512Mb</ti>
210 <ti>Swap</ti>
211 <ti>Linux Swap</ti>
212</tr>
213<tr>
214 <ti><path>/dev/sda3</path></ti>
215 <ti>Rest of Disk</ti>
216 <ti>ext3, reiserfs, xfs</ti>
217 <ti>Linux Root</ti>
218</tr>
219</table>
220
221</body>
222</subsection>
223<subsection>
224<title>IBM PReP (RS/6000)</title>
225<body>
226
227<p>
228The IBM PowerPC Reference Platform (PReP) requires a small PReP boot partition
229on the disk's first partition, followed by the swap and root partitions.
230</p>
231
232<table>
233<tr>
234 <th>Partition</th>
235 <th>Size</th>
236 <th>Filesystem</th>
237 <th>Description</th>
238</tr>
239<tr>
240 <ti><path>/dev/sda1</path></ti>
93 <ti>800k</ti> 241 <ti>800k</ti>
94 <ti>Apple_Bootstrap</ti> 242 <ti>None</ti>
95</tr> 243 <ti>PReP Boot Partition (Type 0x41)</ti>
96<tr> 244</tr>
97 <ti><path>/dev/hda3</path></ti> 245<tr>
98 <ti><path>/dev/hda2</path></ti> 246 <ti><path>/dev/sda2</path></ti>
99 <ti><path>/dev/hda1</path></ti>
100 <ti>(swap)</ti>
101 <ti>512M</ti> 247 <ti>512Mb</ti>
102 <ti>Swap partition</ti> 248 <ti>Swap</ti>
103</tr> 249 <ti>Linux Swap (Type 0x82)</ti>
104<tr> 250</tr>
105 <ti><path>/dev/hda4</path></ti> 251<tr>
106 <ti><path>/dev/hda3</path></ti> 252 <ti><path>/dev/sda3</path></ti>
107 <ti><path>/dev/hda2</path></ti>
108 <ti>ext3</ti>
109 <ti>Rest of the disk</ti> 253 <ti>Rest of Disk</ti>
110 <ti>Root partition</ti> 254 <ti>ext3, reiserfs, xfs</ti>
255 <ti>Linux Root (Type 0x83)</ti>
111</tr> 256</tr>
112</table> 257</table>
113 258
114<note> 259<warn>
115There are some partitions named like this: <path>Apple_Driver43, 260<c>parted</c> is able to resize partitions including HFS+. Unfortunately there
116Apple_Driver_ATA, Apple_FWDriver, Apple_Driver_IOKit, 261may be issues with resizing HFS+ journaled filesystems, so, for the best
117Apple_Patches</path>. If you are not planning to use MacOS 9 you can 262results, switch off journaling in Mac OS X before resizing. Remember that any
118delete them, because MacOS X and Linux don't need them. 263resizing operation is dangerous, so attempt at your own risk! Be sure to always
119You might have to use parted in order to delete them, as mac-fdisk can't delete them yet. 264have a backup of your data before resizing!
120</note> 265</warn>
121 266
122<p> 267<p>
123If you are interested in knowing how big a partition should be, or even how many 268If you are interested in knowing how big a partition should be, or even how many
124partitions you need, read on. Otherwise continue now with <uri 269partitions you need, read on. Otherwise continue now with
125link="#fdisk">Default: Using mac-fdisk (Apple/IBM) to Partition your Disk</uri> 270<uri link="#mac-fdisk"> Default: Using mac-fdisk (Apple) to Partition your Disk
126or <uri link="#parted">Alternative: Using parted (especially Pegasos) to 271</uri> or <uri link="#parted">Alternative: Using parted (IBM/Pegasos) to
127Partition your Disk</uri>. 272Partition your Disk</uri>.
128</p> 273</p>
129 274
130</body> 275</body>
131</subsection> 276</subsection>
136<p> 281<p>
137The number of partitions is highly dependent on your environment. For instance, 282The number of partitions is highly dependent on your environment. For instance,
138if you have lots of users, you will most likely want to have your 283if you have lots of users, you will most likely want to have your
139<path>/home</path> separate as it increases security and makes backups easier. 284<path>/home</path> separate as it increases security and makes backups easier.
140If you are installing Gentoo to perform as a mailserver, your <path>/var</path> 285If you are installing Gentoo to perform as a mailserver, your <path>/var</path>
141should be separate as all mails are stored inside <path>/var</path>. A good 286should be separate as all received mail is stored in <path>/var</path>. A good
142choice of filesystem will then maximise your performance. Gameservers will have 287choice of filesystem will then maximise your performance. Game servers should
143a separate <path>/opt</path> as most gaming servers are installed there. The 288have a separate <path>/opt</path> as most game servers are installed there. The
144reason is similar for <path>/home</path>: security and backups. 289reason is similar for <path>/home</path>: security and backups. Whatever layout
290you chose, you will definitely want to keep <path>/usr</path> large: not only
291will it contain the majority of applications, the Portage tree alone takes
292more than 500Mb excluding the various sources that are stored in it.
145</p> 293</p>
146 294
147<p> 295<p>
148As you can see, it very much depends on what you want to achieve. Separate 296As you can see, it very much depends on what you want to achieve. Separate
149partitions or volumes have the following advantages: 297partitions or volumes have the following advantages:
161 If necessary, file system checks are reduced in time, as multiple checks can 309 If necessary, file system checks are reduced in time, as multiple checks can
162 be done in parallel (although this advantage is more with multiple disks than 310 be done in parallel (although this advantage is more with multiple disks than
163 it is with multiple partitions) 311 it is with multiple partitions)
164</li> 312</li>
165<li> 313<li>
166 Security can be enhanced by mounting some partitions or volumes read-only, 314 Security can be enhanced by mounting some partitions or volumes read-only,
167 nosuid (setuid bits are ignored), noexec (executable bits are ignored) etc. 315 nosuid (setuid bits are ignored), noexec (executable bits are ignored) etc.
168</li> 316</li>
169</ul> 317</ul>
170 318
171<p> 319<p>
172However, multiple partitions have one big disadvantage: if not configured 320However, multiple partitions have one big disadvantage: if not configured
173properly, you might result in having a system with lots 321properly, you might result in having a system with lots of free space on one
174of free space on one partition and none on another. There is also a 15-partition 322partition and none on another. There is also a 15-partition limit for SCSI and
175limit for SCSI and SATA. 323SATA.
176</p> 324</p>
177 325
178</body> 326</body>
179</subsection> 327</subsection>
180</section> 328</section>
181<section id="fdisk"> 329<section id="mac-fdisk">
182<title>Default: Using mac-fdisk (Apple/IBM) Partition your Disk</title> 330<title>Default: Using mac-fdisk (Apple) Partition your Disk</title>
183<body> 331<body>
184 332
185<p> 333<p>
186At this point, create your partitions using <c>mac-fdisk</c>: 334At this point, create your partitions using <c>mac-fdisk</c>:
187</p> 335</p>
188 336
189<pre caption="Starting mac-fdisk"> 337<pre caption="Starting mac-fdisk">
190# <i>mac-fdisk /dev/hda</i> 338# <i>mac-fdisk /dev/sda</i>
191</pre> 339</pre>
192 340
193<p> 341<p>
194First delete the partitions you have cleared previously to make room for your 342If you used Apple's Disk Utility to leave space for Linux, first delete the
195Linux partitions. Use <c>d</c> in <c>mac-fdisk</c> to delete those partition(s). 343partitions you have created previously to make room for your new install. Use
344<c>d</c> in <c>mac-fdisk</c> to delete those partition(s). It will ask for the
196It will ask for the partition number to delete. Usually the first partition on 345partition number to delete. Usually the first partition on NewWorld machines
197NewWorld machines (Apple_partition_map) could not be deleted. 346(Apple_partition_map) could not be deleted. If you would like to start with a
347clean disk, you can simply initialize the disk by pressing <c>i</c>. This
348will completely erase the disk, so use this with caution.
198</p> 349</p>
199 350
200<p> 351<p>
201Second, create an <e>Apple_Bootstrap</e> partition by using <c>b</c>. It will 352Second, create an <e>Apple_Bootstrap</e> partition by using <c>b</c>. It will
202ask for what block you want to start. Enter the number of your first free 353ask for what block you want to start. Enter the number of your first free
203partition, followed by a <c>p</c>. For instance this is <c>2p</c>. 354partition, followed by a <c>p</c>. For instance this is <c>2p</c>.
204</p> 355</p>
205 356
206<note> 357<note>
207This partition is <e>not</e> a "boot" partition. It is not used by Linux at all; 358This partition is <e>not</e> a <path>/boot</path> partition. It is not used by
208you don't have to place any filesystem on it and you should never mount it. PPC 359Linux at all; you don't have to place any filesystem on it and you should never
209users don't need an extra partition for <path>/boot</path>. 360mount it. Apple users don't need an extra partition for <path>/boot</path>.
210</note> 361</note>
211 362
212<p> 363<p>
213Now create a swap partition by pressing <c>c</c>. Again <c>mac-fdisk</c> will 364Now create a swap partition by pressing <c>c</c>. Again <c>mac-fdisk</c> will
214ask for what block you want to start this partition from. As we used <c>2</c> 365ask for what block you want to start this partition from. As we used <c>2</c>
215before to create the Apple_Bootstrap partition, you now have to enter 366before to create the Apple_Bootstrap partition, you now have to enter
216<c>3p</c>. When you're asked for the size, enter <c>512M</c> (or whatever size 367<c>3p</c>. When you're asked for the size, enter <c>512M</c> (or whatever size
217you want -- 512MB is recommended though). When asked for a name, enter <c>swap</c> 368you want -- a minimum of 512MB is recommended, but 2 times your physical memory
218(mandatory). 369is the generally accepted size). When asked for a name, enter <c>swap</c>.
219</p> 370</p>
220 371
221<p> 372<p>
222To create the root partition, enter <c>c</c>, followed by <c>4p</c> to select 373To create the root partition, enter <c>c</c>, followed by <c>4p</c> to select
223from what block the root partition should start. When asked for the size, enter 374from what block the root partition should start. When asked for the size, enter
224<c>4p</c> again. <c>mac-fdisk</c> will interpret this as "Use all available 375<c>4p</c> again. <c>mac-fdisk</c> will interpret this as "Use all available
225space". When asked for the name, enter <c>root</c> (mandatory). 376space". When asked for the name, enter <c>root</c>.
226</p> 377</p>
227 378
228<p> 379<p>
229To finish up, write the partition to the disk using <c>w</c> and <c>q</c> to 380To finish up, write the partition to the disk using <c>w</c> and <c>q</c> to
230quit <c>mac-fdisk</c>. 381quit <c>mac-fdisk</c>.
231</p> 382</p>
232 383
233<note> 384<note>
234To make sure everything is ok, you should run mac-fdisk once more and check 385To make sure everything is ok, you should run <c>mac-fdisk -l</c> and check
235whether all the partitions are there. If you don't see any of the partitions 386whether all the partitions are there. If you don't see any of the partitions
236you created, or the changes you made, you should reinitialize your partitions 387you created, or the changes you made, you should reinitialize your partitions
237by pressing "i" in mac-fdisk. Note that this will recreate the partition map 388by pressing "i" in mac-fdisk. Note that this will recreate the partition map
238and thus remove all your partitions. 389and thus remove all your partitions.
239</note> 390</note>
240 391
241<p> 392<p>
242Now that your partitions are created, you can continue with <uri 393Now that your partitions are created, you can continue with
243link="#filesystems">Creating Filesystems</uri>. 394<uri link="#filesystems">Creating Filesystems</uri>.
244</p> 395</p>
245 396
246</body> 397</body>
247</section> 398</section>
248<section id="parted"> 399<section id="parted">
249<title>Using parted (especially Pegasos) to Partition your Disk</title> 400<title>Using parted to Partition your Disk (Pegasos and RS/6000)</title>
250<body> 401<body>
251 402
252<p> 403<p>
253<c>parted</c>, the Partition Editor, can now handle HFS+ partitions used by 404<c>parted</c>, the Partition Editor, can now handle HFS+ partitions used by
254Mac OS and Mac OS X. With this tool you can shrink your Mac-partitions and 405Mac OS and Mac OS X. With this tool you can resize your Mac-partitions and
255create space for your Linux partitions. Nevertheless, the example below 406create space for your Linux partitions. Nevertheless, the example below
256describes partitioning for Pegasos machines only. 407describes partitioning for Pegasos machines only.
257</p> 408</p>
258 409
259<p> 410<p>
260To begin let's fire up <c>parted</c>: 411To begin let's fire up <c>parted</c>:
261</p> 412</p>
262 413
263<pre caption="Starting parted"> 414<pre caption="Starting parted">
264# <i>parted /dev/hda</i> 415# <i>parted /dev/sda</i>
265</pre> 416</pre>
266 417
267<p> 418<p>
268If the drive is unpartitioned, run <c>mklabel amiga</c> to create a new 419If the drive is unpartitioned, run <c>mklabel amiga</c> to create a new
269disklabel for the drive. 420disklabel for the drive.
270</p> 421</p>
271 422
272<p> 423<p>
273You can type <c>print</c> at any time in parted to display the current partition 424You can type <c>print</c> at any time in parted to display the current partition
274table. Your changes aren't saved until you quit the application; if at any time 425table. If at any time you change your mind or made a mistake you can press
275you change your mind or made a mistake you can press <c>Ctrl-c</c> to abort 426<c>Ctrl-c</c> to abort parted.
276parted.
277</p> 427</p>
278 428
279<p> 429<p>
280If you intend to also install MorphOS on your Pegasos create an affs1 filesystem 430If you intend to also install MorphOS on your Pegasos create an affs1 filesystem
281named "BI0" (BI zero) at the start of the drive. 50MB should be more than enough 431at the start of the drive. 32MB should be more than enough to store the MorphOS
282to store the MorphOS kernel. If you have a Pegasos I or intend to use reiserfs or 432kernel. If you have a Pegasos I or intend to use any filesystem besides ext2 or
283xfs, you will also have to store your Linux kernel on this partition (the 433ext3, you will also have to store your Linux kernel on this partition (the
284Pegasos II can boot from ext2/ext3 drives). To create the partition run 434Pegasos II can only boot from ext2/ext3 or affs1 partitions). To create the
285<c>mkpart primary affs1 START END</c> where <c>START</c> and <c>END</c> should 435partition run <c>mkpart primary affs1 START END</c> where <c>START</c> and
286be replaced with the megabyte range (e.g. <c>5 55</c> creates a 50 MB partition 436<c>END</c> should be replaced with the megabyte range (e.g. <c>0 32</c>) which
287starting at 5MB and ending at 55MB. 437creates a 32 MB partition starting at 0MB and ending at 32MB. If you chose to
288</p> 438create an ext2 or ext3 partition instead, substitute ext2 or ext3 for affs1 in
289 439the mkpart command.
290<p> 440</p>
291You need to create two partitions for Linux, one root filesystem for all your 441
292program files etc, and one swap partition. To create the root filesystem you
293must first decide which filesystem to use. Possible options are ext2, ext3,
294reiserfs and xfs. Unless you know what you are doing, use ext3. Run
295<c>mkpart primary ext3 START END</c> to create an ext3 partition. Again, replace
296<c>START</c> and <c>END</c> with the megabyte start and stop marks for the
297partition.
298</p> 442<p>
299 443You will need to create two partitions for Linux, one root filesystem and one
444swap partition. Run <c>mkpart primary START END</c> to create each partition,
445replacing <c>START</c> and <c>END</c> with the desired megabyte boundries.
300<p> 446</p>
447
448<p>
301It is generally recommended that you create a swap partition the same size as 449It is generally recommended that you create a swap partition that is two times
302the amount of RAM in your computer times two. You will probably get away with a 450bigger than the amount of RAM in your computer, but at least 512Mb is
303smaller swap partition unless you intend to run a lot of applications at the 451recommended. To create the swap partition, run
304same time (although at least 512MB is recommended). To create the swap 452<c>mkpart primary linux-swap START END</c> with START and END again denoting
305partition, run <c>mkpart primary linux-swap START END</c>. 453the partition boundries.
306</p>
307
308<p> 454</p>
309Write down the partition minor numbers as they are required during the 455
310installation process. To display the minor numbers run <c>print</c>. Your drives
311are accessed as <path>/dev/hdaX</path> where X is replaced with the minor number
312of the partition.
313</p> 456<p>
314
315<p>
316When you are done in parted simply run <c>quit</c>. 457When you are done in parted simply type <c>quit</c>.
317</p> 458</p>
318 459
319</body> 460</body>
320</section> 461</section>
321<section id="filesystems"> 462<section id="filesystems">
323<subsection> 464<subsection>
324<title>Introduction</title> 465<title>Introduction</title>
325<body> 466<body>
326 467
327<p> 468<p>
328Now that your partitions are created, it is time to place a filesystem on them. 469Now that your partitions are created, it is time to place a filesystem on them.
329If you don't care about what filesystem to choose and are happy with what we use 470If you're not sure which filesystems to choose and are happy with our defaults,
330as default in this handbook, continue with <uri 471continue with
331link="#filesystems-apply">Applying a Filesystem to a Partition</uri>. 472<uri link="#filesystems-apply">Applying a Filesystem to a Partition</uri>.
332Otherwise read on to learn about the available filesystems... 473Otherwise, read on to learn about the available filesystems.
333</p> 474</p>
334 475
335</body> 476</body>
336</subsection>
337<subsection> 477</subsection>
338<title>Filesystems?</title>
339<body>
340 478
341<p> 479<subsection>
342Several filesystems are available. ext2, ext3, ReiserFS and XFS are found stable 480<include href="hb-install-filesystems.xml"/>
343on the PPC architecture. jfs is unsupported. 481</subsection>
482
483<subsection>
484<title>Activating the Swap Partition</title>
485<body>
486
344</p> 487<p>
345 488<c>mkswap</c> is the command that is used to initialize swap partitions:
346<p> 489</p>
347<b>ext2</b> is the tried and true Linux filesystem but doesn't have metadata 490
348journaling, which means that routine ext2 filesystem checks at startup time can 491<pre caption="Creating a swap signature">
349be quite time-consuming. There is now quite a selection of newer-generation 492# <i>mkswap /dev/sda3</i>
350journaled filesystems that can be checked for consistency very quickly and are 493</pre>
351thus generally preferred over their non-journaled counterparts. Journaled 494
352filesystems prevent long delays when you boot your system and your filesystem
353happens to be in an inconsistent state.
354</p> 495<p>
355 496To activate the swap partition, use <c>swapon</c>:
356<p> 497</p>
357<b>ext3</b> is the journaled version of the ext2 filesystem, providing metadata 498
358journaling for fast recovery in addition to other enhanced journaling modes like 499<pre caption="Activating the swap partition">
359full data and ordered data journaling. ext3 is a very good and reliable 500# <i>swapon /dev/sda3</i>
360filesystem. It has an additional hashed b-tree indexing option that enables 501</pre>
361high performance in almost all situations. In short, ext3 is an excellent 502
362filesystem.
363</p> 503<p>
364 504Create and activate the swap now before creating other filesystems.
365<p>
366<b>ReiserFS</b> is a B*-tree based filesystem that has very good overall
367performance and greatly outperforms both ext2 and ext3 when dealing with small
368files (files less than 4k), often by a factor of 10x-15x. ReiserFS also scales
369extremely well and has metadata journaling. As of kernel 2.4.18+, ReiserFS is
370solid and usable as both general-purpose filesystem and for extreme cases such
371as the creation of large filesystems, the use of many small files, very large
372files and directories containing tens of thousands of files.
373</p>
374
375<p>
376<b>XFS</b> is a filesystem with metadata journaling which comes with a robust
377feature-set and is optimized for scalability. We only recommend using this
378filesystem on Linux systems with high-end SCSI and/or fibre channel storage and
379an uninterruptible power supply. Because XFS aggressively caches in-transit data
380in RAM, improperly designed programs (those that don't take proper precautions
381when writing files to disk and there are quite a few of them) can lose a good
382deal of data if the system goes down unexpectedly.
383</p> 505</p>
384 506
385</body> 507</body>
386</subsection> 508</subsection>
387<subsection id="filesystems-apply"> 509<subsection id="filesystems-apply">
415 <ti><c>mkfs.xfs</c></ti> 537 <ti><c>mkfs.xfs</c></ti>
416</tr> 538</tr>
417</table> 539</table>
418 540
419<p> 541<p>
420For instance, to have the root partition (<path>/dev/hda4</path> in our example) 542For instance, to make an ext3 filesystem on the root partition
421in ext3 (as in our example), you would use: 543(<path>/dev/sda4</path> in our example), you would use:
422</p> 544</p>
423 545
424<pre caption="Applying a filesystem on a partition"> 546<pre caption="Applying a filesystem on a partition">
425# <i>mke2fs -j /dev/hda4</i> 547# <i>mke2fs -j /dev/sda4</i>
426</pre> 548</pre>
427 549
428<p> 550<p>
429Now create the filesystems on your newly created partitions (or logical 551Now create the filesystems on your newly created partitions (or logical
430volumes). 552volumes).
431</p> 553</p>
432 554
433<note> 555<impo>
434On OldWorld machines and the PegasosII your partition which holds the kernel must 556If you choose to use ReiserFS for <path>/</path>, do not change its default
435be ext2 or ext3. NewWorld machines can boot from any of ext2, ext3, XFS, 557block size if you will also be using <c>yaboot</c> as your bootloader, as
436ReiserFS or even HFS/HFS+ filesystems. 558explained in <uri link="?part=1&amp;chap=10">Configuring the Bootloader</uri>.
559</impo>
560
437</note> 561<note>
438 562On the PegasosII your partition which holds the kernel must be ext2, ext3 or
439</body> 563affs1. NewWorld machines can boot from any of ext2, ext3, XFS, ReiserFS or
440</subsection> 564even HFS/HFS+ filesystems. On OldWorld machines booting with BootX, the kernel
441<subsection> 565must be placed on an HFS partition, but this will be completed when you
442<title>Activating the Swap Partition</title> 566configure your bootloader.
443<body> 567</note>
444
445<p>
446<c>mkswap</c> is the command that is used to initialize swap partitions:
447</p>
448
449<pre caption="Creating a Swap signature">
450# <i>mkswap /dev/hda3</i>
451</pre>
452
453<p>
454To activate the swap partition, use <c>swapon</c>:
455</p>
456
457<pre caption="Activating the swap partition">
458# <i>swapon /dev/hda3</i>
459</pre>
460
461<p>
462Create and activate the swap now.
463</p>
464 568
465</body> 569</body>
466</subsection> 570</subsection>
467</section> 571</section>
468<section> 572<section>
469<title>Mounting</title> 573<title>Mounting</title>
470<body> 574<body>
471 575
472<p> 576<p>
473Now that your partitions are initialized and are housing a filesystem, it is 577Now that your partitions are initialized and are housing a filesystem, it is
474time to mount those partitions. Use the <c>mount</c> command. Don't forget to 578time to mount those partitions. Use the <c>mount</c> command. As an example we
475create the necessary mount directories for every partition you created. As an 579mount the root partition:
476example we create a mount-point and mount the root partition:
477</p> 580</p>
478 581
479<pre caption="Mounting partitions"> 582<pre caption="Mounting partitions">
480# <i>mkdir /mnt/gentoo</i>
481# <i>mount /dev/hda4 /mnt/gentoo</i> 583# <i>mount /dev/sda4 /mnt/gentoo</i>
482</pre> 584</pre>
483 585
484<note> 586<note>
485If you want your <path>/tmp</path> to reside on a separate partition, be sure to 587If you want your <path>/tmp</path> to reside on a separate partition, be sure to
486change its permissions after mounting: <c>chmod 1777 /mnt/gentoo/tmp</c>. This 588change its permissions after mounting and unpacking with
487also holds for <path>/var/tmp</path>. 589<c>chmod 1777 /mnt/gentoo/tmp</c>. This is also true for <path>/var/tmp</path>.
488</note> 590</note>
489
490<p>
491Finally we have to create the <path>/dev</path> files in our new home, which is
492needed during the bootloader installation. This could be done by "bind"-mapping
493the <path>/dev</path>-filesystem from the LiveCD:
494</p>
495
496<pre caption="Bind-mounting the /dev-filesystem">
497# <i>mkdir /mnt/gentoo/dev</i>
498# <i>mount -o bind /dev /mnt/gentoo/dev</i>
499</pre>
500
501<p>
502We will also have to mount the proc filesystem (a virtual interface with the
503kernel) on <path>/proc</path>. But first we will need to place our files on the
504partitions.
505</p>
506 591
507<p> 592<p>
508Continue with <uri link="?part=1&amp;chap=5">Installing the Gentoo 593Continue with <uri link="?part=1&amp;chap=5">Installing the Gentoo
509Installation Files</uri>. 594Installation Files</uri>.
510</p> 595</p>

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