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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<H2><A NAME="s14">14. ÌäÂê¤Î²ò·è</A></H2>

<P>ÌäÂê¤òÊú¤¨¤¿¤È»×¤¦¿Í¤Î¿¤¯¤Ï¡¢¤·¤«¤·¼ÂºÝ¤Ë¤Ï²¿¤â°­¤¤ÅÀ¤Ï¤¢¤ê¤Þ¤»¤ó¡£
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¤â¤·µ¯Æ°»þ¤Ë `LI' ¤ÎÀè¤Ë¿Ê¤Þ¤Ê¤¤¾ì¹ç¤Ï LILO ¤Ë¥­¡¼¥ï¡¼¥É
`linear' ¤òÍ¿¤¨¤Æ¤¯¤À¤µ¤¤¡£
¥«¡¼¥Í¥ë¤Îµ¯Æ°¥á¥Ã¥»¡¼¥¸¤ò¸«¤Æ»×¤¤½Ð¤·¤Æ¤¯¤À¤µ¤¤:
(LILO ¤ä fdisk ¤ä¥«¡¼¥Í¥ë¥³¥Þ¥ó¥É¥é¥¤¥ó¤Ç¥Ø¥Ã¥É¿ô¤ä¥·¥ê¥ó¥À¿ô¤ò
Í¿¤¨¤Æ)¥¸¥ª¥á¥È¥ê¤ò¤¤¤¸¤¯¤ì¤Ð¤¤¤¸¤¯¤ë¤Û¤É¡¢
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<P>¤µ¤é¤Ë»×¤¤½Ð¤·¤Æ¤¯¤À¤µ¤¤:
Linux ¤¬¥Ç¥£¥¹¥¯¤Î¥¸¥ª¥á¥È¥ê¤ò»È¤ï¤Ê¤¤½ê¡¢
¤Ä¤Þ¤êLinux ¤¬Æ°ºî¤·¤Æ¤¤¤ë´Ö¤Ï¡¢
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¤½¤ì¤É¤³¤í¤«¡¢¥Ç¥£¥¹¥¯¤Î¥¸¥ª¥á¥È¥ê¤Ï LILO ¤È fdisk ¤À¤±¤Ë»ÈÍѤµ¤ì¤Þ¤¹¡£
¤½¤¦¡¢LILO ¤¬¥«¡¼¥Í¥ë¤Îµ¯Æ°¤Ë¼ºÇÔ¤¹¤ë¾ì¹ç¤Ï¡¢
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¤È¤ê¤ï¤±¡¢mount ¤¬Æ°ºî¤·¤Ê¤¤¤è¤¦¤Ë»×¤¨¤ë¾ì¹ç¤Ç¤â¡¢
¥Ç¥£¥¹¥¯¤Î¥¸¥ª¥á¥È¥ê¤Ë¤Ï²¿¤Î´Ø·¸¤â¤¢¤ê¤Þ¤»¤ó - ÌäÂê¤Ï¾¤Î½ê¤Ë¤¢¤ê¤Þ¤¹¡£
<P>
<H2><A NAME="ss14.1">14.1 ÌäÂê: SCSI ¤«¤éµ¯Æ°¤·¤¿»þ¡¢IDE ¥Ç¥£¥¹¥¯¤¬ÊѤʥ¸¥ª¥á¥È¥ê¤ò»ý¤Ã¤Æ¤¤¤ë</A>
</H2>

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Linux ¥«¡¼¥Í¥ë¤Ï hd0 ¤È hd1 (80H ¤È 81H ¤Î¿ô»ú¤¬¤Õ¤é¤ì¤¿ BIOS ¥É¥é¥¤¥Ö)
¤Ë¤Ä¤¤¤Æ BIOS ¤ËÌ䤤¹ç¤ï¤»¡¢
¤³¤Î¥Ç¡¼¥¿¤¬ hda ¤È hdb ¤Î¤â¤Î¤À¤È²¾Äꤷ¤Þ¤¹¡£
¤·¤«¤· SCSI ¤«¤éµ¯Æ°¤·¤¿¥·¥¹¥Æ¥à¾å¤Ç¤Ï¡¢
ºÇ½é¤ÎÆó¤Ä¤Î¥Ç¥£¥¹¥¯¤¬ SCSI ¥Ç¥£¥¹¥¯¤Ç¤·¤ç¤¦¤«¤é¡¢
ºÇ½é¤Î IDE ¥Ç¥£¥¹¥¯ hda ¤Ç¤¢¤ë 5ÈÖÌܤΥǥ£¥¹¥¯¤ËÂФ·¤Æ
sda ¤Î¥¸¥ª¥á¥È¥ê¤¬³ä¤êÅö¤Æ¤é¤ì¤ë¤Ê¤ó¤Æ¤³¤È¤¬µ¯¤­¤ë¤«¤â¤·¤ì¤Þ¤»¤ó¡£
¤³¤ì¤Ï¡¢µ¯Æ°»þ¤ä /etc/lilo.conf ¤Ë¤ª¤¤¤Æ¡¢Å¬Àڤʿô»ú C, H, S ¤ò»È¤Ã¤Æ
¥Ö¡¼¥È¥Ñ¥é¥á¡¼¥¿ `hda=C,H,S' ¤òÍ¿¤¨¤ë¤³¤È¤Ç´Êñ¤Ë²ò·è¤Ç¤­¤Þ¤¹¡£
<P>
<P>
<H2><A NAME="ss14.2">14.2 ÌäÂê¤Ê¤·: Ʊ¤¸¥Ç¥£¥¹¥¯¤¬°Û¤Ê¤ë¥¸¥ª¥á¥È¥ê¤ò»ý¤Ã¤Æ¤¤¤ë?</A>
</H2>

<P>¡Ö»ä¤Ï¤Þ¤Ã¤¿¤¯Æ±¤¸ IBM À½¤Î¥Ç¥£¥¹¥¯¤ò 2Âæ»ý¤Ã¤Æ¤¤¤Þ¤¹¡£
¤·¤«¤·¡¢fdisk ¤¬É½¼¨¤¹¤ë¥µ¥¤¥º¤Ï°Û¤Ê¤Ã¤Æ¤¤¤Þ¤¹¡£¤³¤ó¤Ê´¶¤¸:
<BLOCKQUOTE><CODE>
<PRE>
# fdisk -l /dev/hdb
Disk /dev/hdb: 255 heads, 63 sectors, 1232 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot  Start      End   Blocks   Id  System
/dev/hdb1           1     1232  9896008+  83  Linux native
# fdisk -l /dev/hdd
Disk /dev/hdd: 16 heads, 63 sectors, 19650 cylinders
Units = cylinders of 1008 * 512 bytes

   Device Boot  Start      End   Blocks   Id  System
/dev/hdd1           1    19650  9903568+  83  Linux native
</PRE>
</CODE></BLOCKQUOTE>

²¿¤Ç¤Ç¤·¤ç?¡×
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hdb ¤Ï 255*63*1232*512 = 10133544960 ¥Ð¥¤¥È¤Ç¡¢
hdd ¤Ï 16*63*19650*512 = 10141286400 ¥Ð¥¤¥È¤Ç¤¹¤¬¡¢
²¿¤â°­¤¤½ê¤Ï¤Ê¤¤¤·¥«¡¼¥Í¥ë¤Ï¤É¤Á¤é¤â 10.1 GB ¤Ç¤¢¤ë¤ÈÍý²ò¤·¤Æ¤¤¤Þ¤¹¡£
¤Ç¤Ï²¿¸Î¥µ¥¤¥º¤¬°ã¤¦¤Î¤Ç¤·¤ç¤¦?
¤½¤ì¤Ï¡¢¥«¡¼¥Í¥ë¤ÏºÇ½é¤ÎÆóÂæ¤Î IDE ¥Ç¥£¥¹¥¯¤Ë¤Ä¤¤¤Æ¤Ï BIOS ¤«¤é¾ðÊó¤òÆÀ¡¢
¤½¤Î BIOS ¤Ï hdb ¤ò 255 ¥Ø¥Ã¥É¤ÇºÆ¥Þ¥Ã¥×¤·¤Æ¤¤¤ë¤«¤é¤Ç¤¹
(16*19650/255=1232 ¥·¥ê¥ó¥À)¡£
¤³¤Î´Ý¤á¤Ë¤è¤ë»¼º¤Ï 8MB ¼å¤Ç¤¹¡£
<P>hdd ¤âƱ¤¸ÊýË¡¤ÇºÆ¥Þ¥Ã¥×¤·¤¿¤¤¤Î¤Ê¤é¤Ð¡¢
¥«¡¼¥Í¥ë¤Î¥Ö¡¼¥È¥Ñ¥é¥á¡¼¥¿¤Ë  `hdd=1232,255,63' ¤òÍ¿¤¨¤Æ¤¯¤À¤µ¤¤¡£
<P>
<H2><A NAME="df_fdisk"></A> <A NAME="ss14.3">14.3 ÌäÂê¤Ê¤·: df ¤è¤ê fdisk ¤ÎÊý¤¬¥Ñ¡¼¥Æ¥£¥·¥ç¥ó¤¬Â礭¤¯¸«¤¨¤ë</A>
</H2>

<P>fdisk ¤Ï¥Ö¥í¥Ã¥¯¤¬¥Ç¥£¥¹¥¯¾å¤Ë¤¤¤¯¤Ä¸ºß¤¹¤ë¤«¤òÊó¹ð¤·¤Þ¤¹¡£
mke2fs ¤ò»È¤Ã¤Æ¥Ç¥£¥¹¥¯¾å¤Ë¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤òºî¤Ã¤¿¾ì¹ç¡¢
¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤ÏÊíµ­(bookkeeping)¤Î¤¿¤á¤Î¤¤¤¯¤é¤«¤Î¥¹¥Ú¡¼¥¹¤òɬÍפȤ·¤Þ¤¹
- Ä̾ï¤Ï¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Î¥µ¥¤¥º¤Î 4% ¤¯¤é¤¤¤Ç¡¢
mke2fs ¤¹¤ëºÝ¤Ë¿¤¯¤Î inode ¤òºî¤ë¤È¤è¤êÁý¤¨¤Þ¤¹¡£
°Ê²¼¤ÏÎã¤Ç¤¹:
<BLOCKQUOTE><CODE>
<PRE>
# sfdisk -s /dev/hda9
4095976
# mke2fs -i 1024 /dev/hda9
mke2fs 1.12, 9-Jul-98 for EXT2 FS 0.5b, 95/08/09
...
204798 blocks (5.00%) reserved for the super user
...
# mount /dev/hda9 /somewhere
# df /somewhere
Filesystem         1024-blocks  Used Available Capacity Mounted on
/dev/hda9            3574475      13  3369664      0%   /mnt
# df -i /somewhere
Filesystem           Inodes   IUsed   IFree  %IUsed Mounted on
/dev/hda9            4096000      11 4095989     0%  /mnt
#
</PRE>
</CODE></BLOCKQUOTE>

¤Þ¤º¡¢4095976 ¥Ö¥í¥Ã¥¯¤Î¥Ñ¡¼¥Æ¥£¥·¥ç¥ó¤¬¤¢¤ê¤Þ¤¹¡£
¤³¤³¤Ë ext2 ¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤òºîÀ®¤·¡¢Å¬Åö¤Ê½ê¤Ë¥Þ¥¦¥ó¥È¤·¤Þ¤¹¡£
¤¹¤ë¤È 3574475 ¥Ö¥í¥Ã¥¯¤Ë¤Ê¤Ã¤Æ¤·¤Þ¤¤¤Þ¤¹
- 521501 ¥Ö¥í¥Ã¥¯ (12%) ¤Ï inode ¤È¾¤ÎÊíµ­ÍÑ¥¹¥Ú¡¼¥¹¤Ë¾ÃÈñ¤µ¤ì¤¿¤Î¤Ç¤¹¡£
¹ç·× 3574475 ¤È 3369664 ¤Î´Ö¤Îº¹¤Ï¡¢¥æ¡¼¥¶¤¬ 13 ¥Ö¥í¥Ã¥¯¤ò»ÈÍѤ·¤Æ¤¤¤Æ¡¢
¤µ¤é¤Ë 204798 ¥Ö¥í¥Ã¥¯¤¬ root ¤Î¤¿¤á¤ËͽÌ󤵤ì¤Æ¤¤¤ë¤¿¤á¤Ç¤¢¤ë¤³¤È¤Ë
Ãí°Õ¤·¤Æ¤¯¤À¤µ¤¤¡£
¸å¼Ô¤Ï tune2fs ¤ÇÊѹ¹¤Ç¤­¤Þ¤¹¡£
¤³¤Î `-i 1024' ¤Ï¥Ë¥å¡¼¥¹¥¹¥×¡¼¥ë¤Ê¤É¤Î¾®¤µ¤¤¥Õ¥¡¥¤¥ë¤¬»³¤Û¤É¤¢¤ë
¾ì¹ç¤Ë¤Î¤ßŬ¤·¤Æ¤¤¤Þ¤¹¡£
¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¤³¤¦¤Ê¤ê¤Þ¤¹:
<BLOCKQUOTE><CODE>
<PRE>
# mke2fs /dev/hda9
# mount /dev/hda9 /somewhere
# df /somewhere
Filesystem         1024-blocks  Used Available Capacity Mounted on
/dev/hda9            3958475      13  3753664      0%   /mnt
# df -i /somewhere
Filesystem           Inodes   IUsed   IFree  %IUsed Mounted on
/dev/hda9            1024000      11 1023989     0%  /mnt
#
</PRE>
</CODE></BLOCKQUOTE>

º£ÅÙ¤Ï 137501 ¥Ö¥í¥Ã¥¯(3.3%)¤Î¤ß¤¬ inode ¤Î¤¿¤á¤Ë»ÈÍѤµ¤ì¡¢
¤½¤Î·ë²Ì°ÊÁ°¤è¤ê 384 MB ¤âÁý¤¨¤Æ¤Þ¤¹¡£
(inode 1¤Ä¤Ë¤Ä¤­ 128 ¥Ð¥¤¥È»È¤Ã¤Æ¤ë¤ß¤¿¤¤¤Ç¤¹¡£)
°ìÊý¡¢Àè¤Î¾ì¹ç¤Ç¤Ï 4096000 ¥Õ¥¡¥¤¥ëÊݸ¤Ç¤­¤ë¤Î¤ËÂФ·(¤É¤¦¸«¤Æ¤â¿¤¹¤®)¡¢
¤³¤Î¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Ç¤ÏºÇÂç 1024000 ¥Õ¥¡¥¤¥ë¤¬Êݸ¤Ç¤­¤Þ¤¹
(¤³¤ì¤Ç¤â½½Ê¬¤¹¤®¤Þ¤¹)¡£
<P>
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