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·¢ÐÅÈË: raner (lilo), ÐÅÇø: Linux
±ê Ìâ: Linuxϵļ¸ÖÖÌØÊâ¿éÉ豸
·¢ÐÅÕ¾: BBS ˮľÇ廪վ (Wed Dec 31 14:57:24 1997)
(1) RAM Disk
device /dev/ram1 ~ /dev/ram8 device number (1,1)-(1,8)
ȱʡramdisk×î´óΪ4M, Æäʵ¼ÊÈÝÁ¿¸ù¾ÝÕ¼ÓÃÇé¿öµ÷Õû.ÈôҪʹÓÃ
´óÓÚ4MµÄramdisk, ¿ÉÒÔ¸økernel¼Ó²ÎÊý ramdisk_sizeÀ´µ÷Õû
eg: mke2fs /dev/ram1 ÔÚ¿éÉ豸/dev/ram1ÉϽ¨ext2 fs
mount /dev/ram1 /mnt
mke2fs /dev/ram2 2048 É趨×î´óΪ2048K
mount /dev/ram2 /mnt
(2) Loopback Device
device /dev/loop0 ~ /dev/loop7 device number (7,0)-(7,7)
Ëùνloopback deviceÖ¸µÄ¾ÍÊÇÄÃÎļþÀ´Ä£Äâ¿éÉ豸, Ê×ÏÈÄãµÄkernelÒªÖ§³Ö,
¿ÉÒÔÔÚcompile kernelʱ¼ÓÈëloopÖ§³Ö£¬»ò¼ÓÈëloopÄ£¿é
insmod loop
eg: dd if=/dev/zero of=/tmp/rootfs bs=1k count=2048 ½¨Ò»¸ö2MµÄÈ«0Îļþ
mke2fs /tmp/rootfs ÔÚrootfsÎļþÉϽ¨ext2 fs
mount /tmp/rootfs /mnt -o loop ½«rootfs mountÔÚ/mntÉÏ
ÕâÀï½éÉܵÄÊǼòµ¥µÄ-o loopÓ÷¨£¬ÁíÒ»ÖÖÓ÷¨ÊÇlosetup(man losetup for more
details)
eg: losetup /dev/loop1 /tmp/rootfs ½«loop1É豸ÓërootfsÏàÁ¬½Ó, ´Ëʱ
losetup /dev/loop1¿É¼ûÐÅÏ¢
mount /dev/loop1 /mnt
...
losetup -d /dev/loop1 È¥³ýloop1É豸ÓëÎļþµÄÈ·Áª½á
(3) MD (Multiple Devices)
device /dev/md0 ~ /dev/md3 device number (9,0)-(9,3)
MD driver¿ÉÒÔ½«¼¸¸öÓ²ÅÌ·ÖÇøºÏÆðÀ´³ÉΪһ¸öÂß¼ÉϵĿéÉ豸, ÏÖÔÚÖ§³Ö
linear(ÏßÐÔÏàÁ¬)ºÍRAID-0(ʹÊý¾Ý¾¡¿ÉÄܾùÔÈ·Ö²¼ÔÚ¸÷·ÖÇøÉÏ). ÄÚºËÖÐÒ»°ã¶¼
ÒÑÓÐMD support, ÆäutilityÔÚ:
ftp://sweet-smoke.ufr-info-p7.ibp.fr/pub/Linux/md035.tgz
ÎÒ·ÅÁËÒ»·ÝÔÚPKU LIB:
ftp://ftp.lib.pku.edu.cn/incoming/linux/md035.tgz
½«Æä½â¿ªºómake install¼´¿É½«¼¸¸öutilityºÍman×°ºÃ
eg: ½«/dev/hda2ºÍ/dev/hda4 Á½¸ö·ÖÇøºÍ³ÉÒ»¸öÂß¼·ÖÇø
mdadd /dev/md0 /dev/hda2 /dev/hda4 Ö¸¶¨/dev/md0°üÀ¨µÄÎïÀí·ÖÇø
mdrun -pl /dev/md0 ÓÃlinear·½Ê½Æô¶¯/dev/md0
mount /dev/md0 /mnt
....
mdstop /dev/md0 Í£Ö¹/dev/md0É豸µÄ¹¤×÷
¡¡¡¡
MDÉ豸¿É½«²»ÏàÁÚµÄС·ÖÇøºÏ³É´ó·ÖÇø, ¶ÔÓÚÓÐʱ²»ÏëÖØ·ÖÇø¿ÉÄÜÓеãÓÃ,
µ«¿ÉϧºÃÏó²»ÄÜÓÃÓÚrootÉ豸±
btw: Happy New Year To All Linux/FreeBSD/GNU fans!
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