<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Times New Roman; font-size: 12pt; color: #000000'>hi. Thanks for your reply. Well, I had tried that before, but no luck. I tried it again, and still no luck: > vgchange -an disk2 0 logical volume(s) in volume group "disk2" now active > sdparm -C stop /dev/sdb > lvscan end_request: I/O error, dev sdb, sector 0 printk: 72 messages suppressed. Buffer I/O error on device sdb, logical block 0 Buffer I/O error on device sdb, logical block 1 Buffer I/O error on device sdb, logical block 2 Buffer I/O error on device sdb, logical block 3 end_request: I/O error, dev sdb, sector 0 Buffer I/O error on device sdb, logical block 0 end_request: I/O error, dev sdb, sector 287277824 /dev/sdb: read failed after 0 of 4096 at 0: Input/output error end_request: I/O error, dev sdb, sector 0 /dev/sdb: read failed after 0 of 4096 at 147086245888: Input/oend_request: I/O error, dev sdb, sector 287274137 utput error /dev/sdb: read failed after 0 of 4096 at 0: Inputend_request: I/O error, dev sdb, sector 287258265 /output error /dev/sdb1: read failed after 0 of 512 at 812646end_request: I/O error, dev sdb, sector 287258029 4: Input/output error /dev/sdb1: read failed after 0 of 2048 end_request: I/O error, dev sdb, sector 281410605 at 0: Input/output error /dev/sdb2: read failed after 0 of 20end_request: I/O error, dev sdb, sector 281410367 48 at 2993881088: Input/output error /dev/sdb2: read failed aend_request: I/O error, dev sdb, sector 63 fter 0 of 2048 at 0: Input/output error /dev/sdb4: read failed after 0 of 1024 at 144082075648: Input/output error /dev/sdb4: read failed after 0 of 2048 at 0: Input/output error ACTIVE '/dev/disk1/blah' [10.00 GB] inherit ACTIVE '/dev/disk1/blah' [100.00 MB] inherit ACTIVE '/dev/disk1/blah' [10.00 GB] inherit ACTIVE '/dev/disk1/blah' [100.00 MB] inherit ACTIVE '/dev/disk1/blah' [10.00 GB] inherit ACTIVE '/dev/disk1/blah' [100.00 MB] inherit I'm using older LVM version: > lvscan --version LVM version: 2.02.25 (2007-04 27) Library version: 1.02.19 (2007-04-27) Driver version: 4.11.0 Any ideas? Thanks ----- Original Message ----- From: "Bryn M. Reeves" <bmr@redhat.com> To: "device-mapper development" <dm-devel@redhat.com> Sent: Wednesday, February 11, 2009 2:39:20 AM GMT -08:00 US/Canada Pacific Subject: Re: [dm-devel] Stopped disk causes LVM to go crazy Alireza Nematollahi wrote: > hi guys, > > I have a system with two SATA disks and I have LVM on the disks. I > use sdparm (sdparm -C stop /dev/sdb) to spin-down one of them. It > works fine and I can hear the disk spinning down and all...But when > I run any LVM command, say lvscan or whatever, I get lots of error > messages: What did you expect? :) If the volume group is active when you remove/spin down the disks LVM has no way of knowing that you wanted to do that. To the software, it just looks like a drive has failed or gone away while it was in use. <snip> > /dev/sdb2: read failed after 0 of 4096 at 2993881088: Input/output > error /dev/sdb2: read failed after 0 of 4096 at 0: Input/output > error /dev/sdb4: read failed after 0 of 1024 at 144082075648: > Input/output error /dev/sdb4: read failed after 0 of 2048 at 0: > Input/output error Even when I physically remove the disk it still > happens. Is there any way I can stop LVM from querying both disks > or at least to stop displaying the error messages? Tell LVM to stop using the disk first. See the man page for vgchange for full details but you want to run: vgchange -an <volume group> To deactivate the volume group *before* you start removing devices that it is using. Regards, Bryn. -- dm-devel mailing list dm-devel@redhat.com https://www.redhat.com/mailman/listinfo/dm-devel </div></body></html>