2006隨手札記

LAB: Raid 1. create raid1 Disk /dev/sdb: 3253 MB, 3253469184 bytes 101 heads, 62 sectors/track, 1014 cylinders Units = cylinders of 6262 * 512 = 3206144 bytes Device Boot Start End Blocks Id System /dev/sdb1 1 32 100161 82 Linux swap / Solaris /dev/sdb2 33 64 100192 fd Linux raid autodetect /dev/sdb3 65 96 100192 fd Linux raid autodetect /dev/sdb4 97 1014 2874258 5 Extended /dev/sdb5 97 128 100161 fd Linux raid autodetect /dev/sdb6 129 160 100161 fd Linux raid autodetect /dev/sdb7 161 192 100161 fd Linux raid autodetect [root@server1 mnt]# mdadm -C /dev/md0 -l 1 -n 2 /dev/sdb{2,3} mdadm: /dev/sdb2 appears to be part of a raid array: level=raid1 devices=2 ctime=Thu Jul 23 21:12:54 2009 mdadm: /dev/sdb3 appears to be part of a raid array: level=raid5 devices=4 ctime=Sat Jul 25 16:52:06 2009 Continue creating array? y mdadm: array /dev/md0 started. [root@server1 mnt]# cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] [raid1] md0 : active raid1 sdb3[1] sdb2[0] 100096 blocks [2/2] [UU] unused devices: 2. mkfs.ext3 [root@server1 mnt]# mkfs.ext3 /dev/md0 mke2fs 1.39 (29-May-2006) Filesystem label= OS type: Linux Block size=1024 (log=0) Fragment size=1024 (log=0) 25064 inodes, 100096 blocks 5004 blocks (5.00%) reserved for the super user First data block=1 Maximum filesystem blocks=67371008 13 block groups 8192 blocks per group, 8192 fragments per group 1928 inodes per group Superblock backups stored on blocks: 8193, 24577, 40961, 57345, 73729 Writing inode tables: done Creating journal (4096 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 27 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. [root@server1 mnt]# mount /dev/md0 /mnt/raid [root@server1 mnt]# mount /dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) /dev/sda1 on /boot type ext3 (rw) tmpfs on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) nfsd on /proc/fs/nfsd type nfsd (rw) /dev/md0 on /mnt/raid type ext3 (rw) 3. test [root@server1 raid]# touch f1.raid.test [root@server1 raid]# touch f2.raid.test [root@server1 raid]# ll total 14 -rw-r--r-- 1 root root 0 Jul 25 17:17 f1.raid.test -rw-r--r-- 1 root root 0 Jul 25 17:17 f2.raid.test #列出/dev/md0 [root@server1 raid]# mdadm --detail /dev/md0 /dev/md0: Version : 00.90.03 Creation Time : Sat Jul 25 17:13:52 2009 Raid Level : raid1 Array Size : 100096 (97.77 MiB 102.50 MB) Used Dev Size : 100096 (97.77 MiB 102.50 MB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Sat Jul 25 17:18:04 2009 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : c03f1c9d:2dd83de8:4522c38b:16119a65 Events : 0.2 Number Major Minor RaidDevice State 0 8 18 0 active sync /dev/sdb2 1 8 19 1 active sync /dev/sdb3 #寫入file: mdadm.conf [root@server1 etc]# mdadm --detail --scan > /etc/mdadm.conf [root@server1 etc]# cat /etc/mdadm.conf ARRAY /dev/md0 level=raid1 num-devices=2 UUID=31d4e3c4:4669a1d3:f213f00e:b35a41c2 [root@server1 etc]# stop /dev/md0 #mdadm -S /dev/md0 #重新啟動 raid (開機時會自動啟動raid) #mdadm -As [root@server1 etc]# mdadm -As mdadm: /dev/md0 has been started with 2 drives. [root@server1 etc]#