On Mon, 2011-03-07 at 18:02 -0600, Ron Johnson wrote: > On 03/07/2011 03:08 PM, Ross Boylan wrote: > > I have a SATA disk in an external USB docking station. The computer it > > is attached to is on UPS, but the external disk has only surge > > protection. > > > > When the power goes out for a moment, the disk, which was /dev/sdc, > > seems to come back as /dev/sdd. The disk has a partition that is part > > of an LVM volume group, and the file system on the disk is inaccessible. > > > > I've had to restart the system to get the disk back. > > > > Is there a better way (aside from getting the disk on UPS)? > > > > Debian Lenny (mostly), 2.6.26-2-686 stock Debian kernel on Pentium 4 > > chip w/hyperthreading. The disk uses the GPT partition format. > > > > Most recent incident: > > <log> > > #power fails > > Mar 7 11:21:18 corn kernel: [182529.931888] ethfast: Link is Down > > Mar 7 11:21:18 corn kernel: [182530.140155] usb 5-3: USB disconnect, > > address 4 > > Mar 7 11:21:18 corn kernel: [182530.140155] usb 5-3.1: USB disconnect, > > address 7 > > Mar 7 11:21:18 corn kernel: [182530.140155] usb 5-3.2: USB disconnect, > > address 8 > > Mar 7 11:21:18 corn kernel: [182530.140155] usblp0: removed > > Mar 7 11:21:18 corn kernel: [182530.375701] usb 5-4: USB disconnect, > > address 5 > > #power resumes > > Mar 7 11:21:21 corn kernel: [182533.121591] usb 5-3: new high speed USB > > device using ehci_hcd and address 9 > > Mar 7 11:21:21 corn kernel: [182533.179788] hub 5-0:1.0: unable to > > enumerate USB device on port 3 > > Mar 7 11:21:30 corn kernel: [182542.755370] __ratelimit: 4 messages > > suppressed > > Mar 7 11:21:30 corn kernel: [182542.755379] Buffer I/O error on device > > dm-15, logical block 8210 > > Mar 7 11:21:30 corn kernel: [182542.755384] lost page write due to I/O > > error on dm-15 > [snip] > > Mar 7 11:43:33 corn kernel: [183938.589854] nfsd: last server has exited > > Mar 7 11:43:33 corn kernel: [183938.614722] nfsd: unexporting all > > filesystems > > </log> > > > > Why are you using device names instead of labels or UUIDs? /dev/sdc (or sdd on power resume) is what the kernel is handing me; is there a way to change that?
My understanding is that LVM uses UUID's, which makes its failure to recover a bit more puzzling to me. I suspect I'm not fully understanding the question. Ross -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/1299561953.11656.48.ca...@corn.betterworld.us
