[mdlug] Drive Assignment Changed when Reinserted into Server

[Jonathan Billings]

It sounds like your SATA controller doesn't support hot-swap.  I think you can "warm-swap" with this command after disconnecting the device. 

echo '0 - 0' > /sys/class/scsi_host/hostX/scan

(Replace the X in hostX with the number corresponding to your device)
--
Jonathan Billings <billings at negate.org>

Robert Adkins II <radkins at impelind.com> wrote:

>Hello all,
> 
>My big new server project is moving along smoothly, the transition of the
>Samba install to the new hardware and new Samba Revision went flawlessly.
> 
>One thing popped up that has given me a few questions.
> 
>I have been unable to find something specifically for allowing me to deal
>with my hotswap question from earlier. In terms of an easy command or string
>of commands for dealing with yanking and restoring a drive to the system
>with some speed and efficiency.
> 
>I did discover 'hdparm' which will allow you to spin down, park, standby and
>power off a drive that is in the chassis.
> 
>In experimenting, I discovered that it is possible to demount, remove
>entries from fstab, run hdparm on the /dev/sd* of the drive in question.
>Pulling the drive at that point didn't do anything immediately untoward on
>the system. It remained running, no crashing and no burning.
> 
>When I reinserted the drive, the drive powered up and was recognized by the
>server. Here is where the issue has arisen.
> 
>When I pulled the drive, it was listed as /dev/sdh and when it was
>reinserted and "automatically" recognized by the hardware the drive was
>assigned to /dev/sdi.
> 
>I am unsure if this will prove to be an issue down the road where the system
>will "run" out of /dev/sd* assignments or if there is something that I can
>or should have done to flush the old /dev/sdh so that the next inserted
>drive would take the /dev/sdh spot when inserted.
> 
>Any pointers?
> 
>Thanks!
> 
>Regards,
>Rob
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