Hi,
Sorry for this long mail. But it is essential to make clear my problem.
During the last week, in our office we installed Red Hat 6.2 on our new server.
Configuration
is :
PIII 550MHZ, 256MB SDRAM, Two 9GB SCSI HDD, 48X CDROM.
We configured raid1(mirroring). The configuration steps were as follows :
1. First HDD partitions (/dev/sda) :
Disk /dev/sda: 64 heads, 32 sectors, 8683 cylinders
Units = cylinders of 2048 * 512 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 26608 83 Linux
/dev/sda2 27 8683 8864768 5 Extended
/dev/sda5 27 4027 4097008 83 Linux
/dev/sda6 4028 6028 2049008 83 Linux
/dev/sda7 6029 7029 1025008 83 Linux
/dev/sda8 7030 7530 513008 82 Linux swap
/dev/sda9 7531 8031 513008 83 Linux
/dev/sda10 8032 8532 513008 83 Linux
/dev/sda11 8533 8683 154608 83 Linux
2. Second HDD partitions (/dev/sdb) :
Disk /dev/sdb: 64 heads, 32 sectors, 8683 cylinders
Units = cylinders of 2048 * 512 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 26 26608 83 Linux
/dev/sdb2 27 8683 8864768 5 Extended
/dev/sdb5 27 4027 4097008 83 Linux
/dev/sdb6 4028 6028 2049008 83 Linux
/dev/sdb7 6029 7029 1025008 83 Linux
/dev/sdb8 7030 7530 513008 82 Linux swap
/dev/sdb9 7531 8031 513008 83 Linux
/dev/sdb10 8032 8532 513008 83 Linux
/dev/sdb11 8533 8683 154608 83 Linux
3. Installed Red Hat 6.2 on first HDD.
4. Configured raidtab file (/etc/raidtab). The contents are as follows :
raiddev /dev/md0
raid-level 1
nr-raid-disks 7
nr-spare-disks 0
persistent-superblock 1
chunk-size 4
device /dev/sdb10
raid-disk 0
device /dev/sdb1
raid-disk 1
device /dev/sdb5
raid-disk 2
device /dev/sdb6
raid-disk 3
device /dev/sdb7
raid-disk 4
device /dev/sdb9
raid-disk 5
device /dev/sdb11
raid-disk 6
5. $ mkraid /dev/md0
6. $ raidstart /dev/md0
This gives the message that raid is active etc. So now I have put it in
/etc/rc.d/rc.local.
So raid is started on booting.
7. The contents of /proc/mdstat after starting raid are as follows :
Personalities : [raid1]
read_ahead 1024 sectors
md0 : active raid1 sdb11[6] sdb9[5] sdb7[4] sdb6[3] sdb5[2] sdb1[1] sdb10[0] 26496
blocks [7/7] [UUUUUUU]
unused devices: <none>
8. Now my problem is. If I try to mount say one of the raid partitions (/dev/sdb1) in
/mnt/raid than I am getting the following error :
EXT2-fs error (device sd(8,17)): read_inode_bitmap: Cannot read inode bitmap -
block_group = 57, inode_bitmap = 1867777
EXT2-fs error (device sd(8,17)): read_inode_bitmap: Cannot read inode bitmap -
block_group = 58, inode_bitmap = 1900545
EXT2-fs error (device sd(8,17)): ext2_check_inodes_bitmap: Wrong free inodes count in
super block, stored = 934375, counted = 15847
9. After this if I type df -h it shows that the partition is mounted, but the size of
/dev/sda1
and size of /dev/sdb1 are not the same. ( It should have been the same isn't it ).
10. Now if I go to /mnt/raid and say ls I can see only one directory (lost+found) and
one more directory tmp which is blinking and I can not CD to this directory.
lost+found directory is empty. How is that inspite of starting raid the mirroring has
not taken place and why I am getting the errors when I try to mount a raid partition.
Note : This mount error comes even if I try to mount the raid partition after stopping
raid. (raidstop /dev/md0).
Can anybody help me on this. How to check whether raid configuration is really
successful or not ?
Thanks for reading this long mail.
Anticipating some help.
Regards
--
Rajesh(ALIAS Shriram) Fowkar
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