2850 drive bays not hot-swap?

[William Warren]

i'm curious why you aren't using the raid card?  Hotswap under linux 
software raid isn't totally automatic IIRC.  here's a link from the 
archives HTH.

http://lists.us.dell.com/pipermail/linux-poweredge/2003-July/008898.html

Brett Dikeman wrote:
> I have a 2850 with the RAID card disabled- using the drives directly,
> in two RAID sets.
> 
> Testing the mirror RAID set for the system drive, I pulled a drive,
> made sure everything still worked, then plugged it back in and tried
> to add it back to the software array, which failed.  I received the
> following kernel messages trying to use fdisk just to see if I could
> do anything with the drive:
> 
> "Buffer I/O error on device sdb, logical block 1"
> (then repeated for logical block 2, 3, 0, 35843684, 35843684 again,
> then 0, 1, and 2 again.  Looking for the partition table, I presume.)
> 
> After a reboot, the drive was added back in and rebuilt successfully.
> 
> The documentation for the machine says the bays are hot-swap U320.  Is
> there something special needed on the Linux side or with the mpt
> controller driver to get this hot-swap goodness?  Or are they only
> hot-swap when using the RAID functions of the controller?
> 
> This system is running Debian Lenny's kernel (2.6.22-3-amd64) and has
> the latest BIOS/firmware for all components, as of a month or two ago.
> 
> Brett
> 
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