[CentOS] Accidentally nuked my system - any suggestions ?

Stephen John Smoogen smooge at gmail.com
Wed Dec 5 13:03:43 UTC 2018


On Wed, 5 Dec 2018 at 00:36, Nicolas Kovacs <info at microlinux.fr> wrote:
>
> Le 04/12/2018 à 23:50, Stephen John Smoogen a écrit :
> > In the rescue mode, recreate the partition table which was on the sdb
> > by copying over what is on sda
> >
> >
> > sfdisk –d /dev/sda | sfdisk /dev/sdb
> >
> > This will give the kernel enough to know it has things to do on
> > rebuilding parts.
>
> Once I made sure I retrieved all my data, I followed your suggestion,
> and it looks like I'm making big progress. The system booted again,
> though it feels a bit sluggish. Here's the current state of things.
>

It will because you have 1/2 the bandwidth and there can be a tiny bit
of 'write to 2 disks.. nope. read from disk b, nope switch to a'.

> [root at alphamule:~] # cat /proc/mdstat
> Personalities : [raid1]
> md125 : active raid1 sdb2[1] sda2[0]
>       512960 blocks super 1.0 [2/2] [UU]
>       bitmap: 0/1 pages [0KB], 65536KB chunk
>
> md126 : inactive sda1[0](S)
>       16777216 blocks super 1.2
>
> md127 : active raid1 sda3[0]
>       959323136 blocks super 1.2 [2/1] [U_]
>       bitmap: 8/8 pages [32KB], 65536KB chunk
>
> unused devices: <none>
>
> Now how can I make my RAID array whole again? For the record, /dev/sda
> is intact, and /dev/sdb is the faulty disk. How can I force
> synchronization with /dev/sda?
>
> Cheers,
>

Phil Perry posted all the things in a better email than I could have (pperry++)

> Niki
>
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-- 
Stephen J Smoogen.



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