Re: What to do with dead raid 1 partitions under mdadm
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On Sun, 26 Oct 2014 08:05:58 -0400
Gary Dale <garydale@torfree.net> wrote:
> On 25/10/14 11:19 PM, mett wrote:
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> > Hi,
(snip)
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> As I undertand your issue:
> - you had RAID 1 arrays md0 (sda1+sdb1) and md1 (sda2+sdb2),
> - sdb1 & sdb2 showed an error, so you removed them from the arrays
> and added sdb3 & sdb4 from the same physical disk,
> - you are now wondering what to do with two partitions on device sdb
> (sdb1 & sdb2).
- -->exactly
> I'm guessing that sdb is nearly toast. Run smartctl -H /dev/sdb on
> it. If it passes, remove it from the array and repartition it, then
> add it back into the array.
>
> If it fails, remove if from your computer and replace it. Whatever
> new drive you get will probably be larger than your current drives,
> so partition it so that the sdb1 is larger than the current sd1a and
> the rest of the space goes to sdb2. In this way, you can expand md1
> when you eventually have to replace sda (it will happen - disks
> eventually fail).
>
> In general it is a really bad idea to keep a filing disk in your
> system. It not only will fail sooner rather than later but will also
> slow down your system due to i/o failures.
>
>
I'll try that and update the results.
Thanks a lot for both answers
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