Hi Darrick, On Monday 03 December 2007 20:36, Darrick J. Wong wrote: > On Mon, Dec 03, 2007 at 05:09:54PM +0100, Krzysztof B??aszkowski wrote: > > I noticed also another failure when i removed a drive. The event was not > > notified by anything (ie the block device and corresponding sg were > > registered) so i run dd on this truly "virtual" drive. > > > > dd reached D state (as well as scsi_wq) . i think it shouldn't happen no > > matter it was AIC failure or LSI expander failure. > > "It's wireless!" ;) yep :) and energy from positive thinking spins disk's plates ;) > > Seriously, though, it's a good idea to tell the kernel that you're > about to unplug a disk before actually doing it: > > echo 1 > /sys/block/sdX/device/delete > > This way, the kernel can tell the disk to flush its caches long before > power actually gets removed. Otherwise, the device removal code can > get hung up just like you observed, and whatever's in the write cache > may or may not actually get written to the media. > imagine just raining Monday and someone who put hand on the drive thus he had to reboot whole box. Thanks, Krzysztof > --D - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
