[CentOS] Accidentally nuked my system - any suggestions ?

Wed Dec 5 05:37:17 UTC 2018
Nicolas Kovacs <info at microlinux.fr>

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.

[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?



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