Public bug reported:
Hi.
I'm experiencing some strange problem with hotswap on my linux box with
SAS1064 SAS controller and 2.6.24-19 kernel. When I'm trying to remove
disk from system, like this:
# systool -b scsi
Bus = "scsi"
Device = "0:0:0:0"
Device = "0:0:1:0"
Device = "0:0:2:0"
Device = "0:0:3:0"
Device = "1:0:0:0"
# echo 1 >
/sys/class/scsi_host/host0/device/port-0\:0/end_device-0\:0/target0\:0\:0/0\:0\:0\:0/delete
# systool -b scsi
Bus = "scsi"
Device = "0:0:1:0"
Device = "0:0:2:0"
Device = "0:0:3:0"
Device = "1:0:0:0"
It's OK. Disk successfully removed. When I'm trying to rescan bus
without physical removal of this disk like this:
# echo "- - -" > /sys/class/scsi_host/host0/scan
It's OK again. Disk successfully attached:
# systool -b scsi
Bus = "scsi"
Device = "0:0:0:0"
Device = "0:0:1:0"
Device = "0:0:2:0"
Device = "0:0:3:0"
Device = "1:0:0:0"
But when I detach disk from system, physically remove it from box, swap
it with another one and try to attach it like:
# echo "- - -" > /sys/class/scsi_host/host0/scan
Nothing happens. Linux doesn't see any new hard drives attached to this host.
Interesting, that if I will swap disk drives again (inserting an old one), and
rescan bus - It'll be OK again, and disk will be successfully attached.
I tried 2.6.24-19 and 2.6.26-5 kernels from Hardy and Intrepid
distribution and got the same on both of them. But when I tried Vanilla
2.6.24 or 2.6.26 kernels - It worked as expected. Even handled out
hotplug events. Kernel 2.6.22-14-server from Gutsy distribution worked
fine too.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
Hotswapping doesn't work on 2.6.24-19-server kernel with SAS1064
https://bugs.launchpad.net/bugs/259164
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