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I have 1 server that using RAID 10 software. However, after recent power failure the server no longer can boot and stuck at grub rescue.

Using ls command for all device n the server does not detect the content thus cannot reinstall grub.

Using rescue mode to at least assemble the raid also fail. assemble scan

I run this command : mdadm --examine --scan --verbose and it shows below; Is it still recoverable?

mdadm examine

Assemble command also fail to assemble the raid.

assemble fail

Alias Harun
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1 Answers1

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Your mdadm --assemble command is wrong, as specified a partition (/dev/sda1) rather what seems the correct component device (/dev/sda). Having said that, the mdadm --assemble --scan -v command does not find any valid superblock.

From mdadm --examine it seems you are using Intel's integrated RAID. Maybe the powerloss reset the CMOS and now your BIOS is passing the raw disk without the correct superblock.

Anyway, for a more in-depth explanation we need more info. Please give us moe info about your RAID setup and share the output of:

  • lspci
  • lshw
  • lsblk
  • pvs
  • vgs
  • lvs
  • mdadm -E /dev/sd[abcd]
shodanshok
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