Re: Linux not adhering to BIOS Drive boot order?

[Russell King]

Andreas Dilger writes:
> Same thing, really.  You have to poke each drive to get the serial
> number.  What if they are IDE or SCSI or FCAL or RAID array?  Probably
> reading a block from a disk is safer than trying to find the drive
> serial number.

If you apply the "read block from disk" method to a RAID1 array, how
you do you know whether you mean:

1) An active disk in the array
2) The actual array itself.

Hint: With Raid 1, the disks are complete images of each other.  You can
mount a single disk which is/was part of a raid 1 array and read all data
off it.

If someone thinks about going down this road, make sure you check the
multiple-device arrays BEFORE the physical disks!
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