Penguin server won't boot after swapping failed hard drive in RAID 6

eg flag

So I have a Penguin Relion 1900 1U rack mounted server running CentOS 7 that recently had a hard disk failure. It had 4 hard drives configured in RAID 6. To replace the failed HDD, I powered off the machine, swapped the failed one with a new drive of the same size (4TB) and powered on the machine again.

The system booted into the EFI shell instead of loading the OS. I exited from the shell and went to BIOS and noticed the status of the RAID array was rebuilding under the RAID menu in advanced setting of the BIOS.

6-7 hours later, I noticed the rebuild had completed and that the RAID status was in 'Optimal' condition with everything looking good. I saved and quit out of the BIOS, but it went into the EFI shell instead of loading the OS again.

I rebooted the machine and under the BIOS boot sequence priority list could not see the virtual drive provided by the RAID. But instead there was a "SCSI Hard Drive, ..." option.

My booting is set to UEFI mode, so I switched to Legacy under the CSM configuration settings in BIOS and when I reboot, it goes into network booting and the "SCSI Hard Drive ..." disappears from the boot order sequence list.

When in Legacy boot, I do get the option to load into the RAID BIOS, which I did to take a look. All status shows optimal and I can see the Virtual Drive created and present in the RAID BIOS. It's just not being picked up by the system BIOS and loading the OS.

I have attached pictures of my BIOS settings.

RAID setting in the System BIOS (only appears when UEFI booting, also notice boot device set to [None])

map -r output on UEFI shell

Boot order in BIOS

CSM config

Any help would be much appreciated. Already spent a whole day try to fix it!


So I tried booting off a CentOS USB and saw that the RAID volume is visible, but not mounted and not set as the boot drive. I cannot seem to mount it either and getting errors as seen in pics below.

fdisk -l


djdomi avatar
za flag
restore from backup. No backups? Question is offtopic then
Watchdogs1499 avatar
eg flag
@djdomi We do have a backup, but it is a month old. We'd prefer trying to restore our current configuration. As far as I can say, all our data is intact in the volume. It's just that the OS cannot see it or boot into it, and that's what I'm trying to figure out.
eg flag


So after talking to manufacturer support and sending them the logs, they concluded that the boot loader got corrupted somehow or was overwritten. This does not normally happen and a simple swap of hard drives should not cause this problem, so it was a one off scenario.


I did have a backup of all the data. Bought fresh hard drives, rebuilt the array, reinstalled the OS and restored from backup.

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