nixCraft

Dear Linux Friends,

I tried to configure raid1 with lvm in centos 5. Here is the disk partition with fdisk -l command:


Disk /dev/hdb: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/hdb1 * 1 13 104391 83 Linux
/dev/hdb2 14 9632 77264617+ fd Linux raid autodetect
/dev/hdb3 9633 9729 779152+ 8e Linux LVM

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 9729 78148161 8e Linux LVM


After installation, when i remove one harddisk, the system won't boot. Now i need to put both harddisk for starting CentOS. I hope i made some mistake during installation.

Now can i remake RAID1 disk without totally reinstalling CentOS ?
Please Help!
Thanks

Is it Software RAID1 or Hardware RAID1?

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Vivek | My personal blog
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it is software RAID1

Did you formatted or modified partitions on 2nd hard disk? If not use raidhotadd command to get the disks re-mirrored.

The raidhotadd command will rebuild your RAID array once the drive has been replaced.

You need to boot from 1st CentOS cd (rescue mode) and fix the issue.
Replace /dev/md0 with actual raid device name (e.g. /dev/md0). While array is under construction, you can see progress and other information by typing following command
The Software-RAID HOWTO

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Raj
Linux rulz.
I have never turned back in my life ; I shall not do so today.. haha

Thanks, i will try it and let you know.