[fxg97873]

Okay, here is the scenario:

A Stripe 1 Disk Mirror with two drives works great...as long as one of the drives is bootable.

So if there is hardware failure on one, as long as the other has a working bootable OS, then the computer will startup fine and a spare can be put in at anytime.

Now, what if the OS becomes non-bootable (through fat fingering of something in the command line)? Also, one of the drives has hardware failure so you now only have one drive left and it has a non-bootable OS.

Questions:
How do you recover the data on that drive?

What is the procedure to recover data from a single non-bootable degraded RAID 1 disk?



My results:
I provide support for a university and I am currently conducting tests on Apple's software RAID 1 using 2 disks.

I purposely broke a mirror my removing one of the drives out of the computer.

I took the single drive that I pulled out and connected it to a 'Firewire to IDE Bridge' and then connnected the bridge to an iBook via a firewire cable.
This is normal proceduren when trying to recover data off a non-bootable disk.

It seems, though, that the drive will not 'mount' because it is in a weird RAID 1 format.

So again, what is the procedure to recover data from a single non-bootable degraded RAID 1 disk?

I will be passing out 'Stars' for those who raise their hands and give answers. Thanks

Fernando

[Kristoff]

Disk Warrior?

[Tyler McAdams]

Try this Solaris method for mirrored configuration in production envoirnments:
www.tyler.mcadams.com/SolarisDisk.pdf

[tooki]

What happens if you leave the corrupted disk attached to the internal ATA bus, and boot from another disk, such as an external FireWire disk, or a boot CD?

Did you try running Disk Utility on the disk?

tooki