PE1750 Software Raid + 2xSCSI Interfaces

[John Hodrien]

On Mon, 3 Jul 2006, Brian E. Seppanen wrote:

> So Long story short, is there a means of assigning specific drive
> identities to specific controllers to prevent this sort of thing
> occurring?   In my fantasy world I assign to the LSI Interface /dev/sda,
> /dev/sdb and /dev/sdc.   The QLA2200 would get /dev/sdd onwards.
>
> This must be possible, so can anyone provide me with a direction to move
> towards a solution?

To somewhat sidestep the issue, device-mapper.  /dev/mapper/partition-id is
constant irrespective of what device the kernel has decided that resides on.
So you could actually take your disks out and shuffle them, and (assuming
you'd got a system where every disk could bot) it wouldn't even really notice.

man dmsetup.

I've always used it in conjunction with LVM, but there's no reason you have
to.

jh

-- 
"Any sufficiently advanced technology is indistinguishable from a rigged
  demo."                                              -- Andy Finkel