[SLL] /dev/sd names not in motherboard order

[Rob Smith]

On Mon, Mar 2, 2009 at 11:34 AM, Derek Simkowiak <dereks at realloc.net> wrote:
>   I would really like to understand how the device names (/dev/sda, etc.)
> are discovered and assigned by Linux.  When one of the drives in my 6-disk
> RAID box fails, I'll need to sit there, unplugging drives one by one from
> the motherboard to see which drive corresponds to the broken one.  (That's
> the one major disadvantage of Linux software RAID that I've found...
> hardware RAID gives you nifty blinkenlights on hot-swappable drives.)

Once the disk is out of the array, I just tend to dd
if=/dev/raid/device of=/dev/null and see which drive's activity light
doesn't light up.