raid q

[ub007]

Hi,

I got RAID 1 on my machine.

Just checking my understanding to know what to expect... Could someone please confirm the below?

In the event of OS getting corrupted / fs issues or a partition going missing on one of the disks, it brings the system down (as the other disk will be a mirror of the corrupt copy for example) & so I still end up having to repair/reinstall OS ie there is no protection in those scenarios even though disks are mirrored., correct?

If a drive fails, the box will continue to be up & running because of RAID 1, right?

Thanks in advance

David

[alf55]

Raid does not replace backups. If a drive fails, the mirror still functions. But say that memory fails and garbage is written to the raid (both drives get that garbage). Where they work best is when the drive just stops spinning. When you notice that a drive making up a raid is starting to fail, you can disable and remove it from the raid and then replace it and add the new drive to the raid and it will copy the old raid drive to the new drive. The "filesystem" sits on top of the raided drives and it gets corrupted, it is really iffy as to the recovery of the drives. If one drive is no longer spinning the machine will run with the other. But remember to put the boot loader (grub) on both drives (the raid does not contain the boot sector) and have your BIOS fall back to the second drive if the first fails to boot.