On Wed, Nov 27, 2013 at 11:44 AM, m.roth@5-cent.us wrote:
Gene Poole wrote:
I'm running CentOS 5.9 x86_64 on a machine I built myself that has 6 SATA II hard drives (4 - 1 TB drives; 2 - 1.5 TB drives) all in several RAID-1 arrays. These arrays were created when I did the original installation with CentOS 5.1 and each created partition (both standard and LVM) were built raid 1.
Due to some things happening around the house that required most of my attention, I saw some alerts concerning drive /dev/sdb but I didn't have time to address it and since I am running raid 1... One of the tings
that
happened was my home took a lightening strike and we were down for 4
days.
You *do* have the system on a UPS, right...?
When we got our electricity back and I brought the machine back up I noticed that there were only 5 drives listed and I wasn't getting any more alerts. What was /dev/sdb was no longer listed with any command (fdisk; cat /proc/mdstat; mdadm --list).
I do have a spare drive and my questions are:
Anyone know how I can find the serial number of the bad drive? Once replaced, what is the best way to get the partitions recreated?
Of the bad one? No. The other option would be to either use smartctl to find the serial numbers of all the rest. Recreate? Make it identical to
smartctl is the tool for this job. Or look at the label on the disk.
one of the others... actually, I think there's a script to use with parted that can clone a drive's partitions.
Once you swap in the spare drive, you can use sfdisk to clone the partition layout.
sfdisk -d /dev/sdX | sfdisk /dev/sdY
where sdX is the healthy disk in whichever software raid1 array and sdY is the new spare drive.
From there you'll just add the partition(s) on the new disk to the proper
array with mdadm.
mark
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