https://bugzilla.novell.com/show_bug.cgi?id=241990 Summary: VG / LV / snapshot not recognized when snapshot exists (lvm2) Product: openSUSE 10.2 Version: Final Platform: i686 OS/Version: SuSE Other Status: NEW Severity: Major Priority: P5 - None Component: Basesystem AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: webclark@rochester.rr.com QAContact: qa@suse.de CC: webclark@rochester.rr.com OS: Suse 10.2 I posted this to suseforums.net for a week and 35 views and got no responses. It seems clear to me that this is not right, so I am posting as a bug. My system has an LVM so that I can build a single "nethome" file system spanning two physical disks. The LVM is not used for the boot, root, or any other system oriented drive. Just this "nethome". It is a pretty simple "clean" install about a month ago, and works fine otherwise. I can create a snapshot and mount it successfully, but if I try to shutdown and boot while the snapshot is in existence, booting fails. Descriptions of the use of snapshots include using them as a mechanism to enable user's to recover deleted files, so I conclude that it should be OK to boot with a snapshot active. I see nothing in the LVM documentation to indicate otherwise. Below I give the sequence of commands to reproduce the problem, and I have typed the pertinent stuff printed on the console when I boot. I did a "vgdisplay -v" at several points in the process, and have attached these at the end. I can reproduce this over and over, it never fails to fail. To be able to boot again, I simply lvremove the snapshot (using the right path even though it is not visible in the file system). Presumably the purpose here is to report the bug so that it can be fixed in the next version, but if possible, I would greatly appreciate knowing how I can fix it in the current version. I don't require hand-holding, just a concise indication of what to do. I have been using UNIX and now Linux for many years, and so know my way around reasonably well once pointed in the right direction, although I don't know all of the particulars of a given system. Thank you. ----------------- To reproduce: ----------------- After a normal boot... See "vgdisplay -v" with lvm mounted on /nethome attached. (I am running like this *now*). lvcreate --size 8G --snapshot --name snap /dev/vg_rnscserver_01/lv_nethome_01 works. See "vgdisplay -v" with snapshot in existance but not mounted attached. mount /dev/vg_rnscserver_01/snap /nethome.snap works. snapshot and base lvm accessible. I have not exercised them in this mode (with a snapshot), but it appears to be functional. See "vgdisplay -v with snapshot mounted, attached. Reboot (With snapshot in existence) The following messages are output to the console, but not captured in dmesg, boot.log, or messages: Activating Device mapper... device-mapper: ioctl:4.7.0-ioctl (2006-06-24) initialized: dm-devel@redhat.com Starting MD RAID Waiting for udev to settle... Scanning for LVM volume groups... Reading all physical volumes. Thismay take a while... Found volume group "vg_rnscserver_01" using metatype lvm2 Activating LVM volume groups... device-mapper: table: 253: 1: snapshot-origin: unknown target type device-mapper: ioctl: error adding target to table device-mapper: reload ioctl failed: invalid argument 1 Logical volume(s) in volume group "vg_rnscserver_01" now active Waiting for /dev/vg_rnscserver_01/lv_nethome_01 . No more events Checking file systems etc. Single user root shell presented. Sure enough /dev/vg_rnscserver_01 does not exist. See "vtdisplay -v" at this point output attached. lvremove /dev/vg_rnscserver_01/snap works (even though /dev/vg_rnscserver_01 is not visible in the file system. See "vgdisplay -v" after snapshot is removed, attached. Reboot. System boots successfully, lvm is mounted and works. -------------------- ATTACHMENTS: -------------------- "vgdisplay -v" with lvm mounted (no snapshot) --------------------------------------------------------- --- Volume group --- VG Name vg_rnscserver_01 System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 18 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 2 Act PV 2 VG Size 203.41 GB PE Size 4.00 MB Total PE 52073 Alloc PE / Size 49920 / 195.00 GB Free PE / Size 2153 / 8.41 GB VG UUID E4kcZk-Y73I-0vrE-JvT5-Sf8t-FDId-UQs50R --- Logical volume --- LV Name /dev/vg_rnscserver_01/lv_nethome_01 VG Name vg_rnscserver_01 LV UUID TPxEJ5-rDSD-ZypA-92l3-kmbY-0Cva-KORW2N LV Write Access read/write LV Status available # open 1 LV Size 195.00 GB Current LE 49920 Segments 2 Allocation inherit Read ahead sectors 0 Block device 253:0 --- Physical volumes --- PV Name /dev/hda8 PV UUID 1byvJe-bX7P-i5rp-bPnW-BVRC-PXw2-NhA9tq PV Status allocatable Total PE / Free PE 23456 / 2153 PV Name /dev/hdb1 PV UUID 1WORbE-Fhu2-xETa-D3fe-qce5-lxBV-gWc7uq PV Status allocatable Total PE / Free PE 28617 / 0 ----------------------------------------------------------------- "vgdisplay -v" with snapshot created but not mounted ----------------------------------------------------------------- --- Volume group --- VG Name vg_rnscserver_01 System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 17 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 1 Max PV 0 Cur PV 2 Act PV 2 VG Size 203.41 GB PE Size 4.00 MB Total PE 52073 Alloc PE / Size 51968 / 203.00 GB Free PE / Size 105 / 420.00 MB VG UUID E4kcZk-Y73I-0vrE-JvT5-Sf8t-FDId-UQs50R --- Logical volume --- LV Name /dev/vg_rnscserver_01/lv_nethome_01 VG Name vg_rnscserver_01 LV UUID TPxEJ5-rDSD-ZypA-92l3-kmbY-0Cva-KORW2N LV Write Access read/write LV snapshot status source of /dev/vg_rnscserver_01/snap [active] LV Status available # open 1 LV Size 195.00 GB Current LE 49920 Segments 2 Allocation inherit Read ahead sectors 0 Block device 253:0 --- Logical volume --- LV Name /dev/vg_rnscserver_01/snap VG Name vg_rnscserver_01 LV UUID 6o7IP6-Sei1-8buE-SC0f-57E5-8uaE-0n7gBS LV Write Access read/write LV snapshot status active destination for /dev/vg_rnscserver_01/lv_nethome_01 LV Status available # open 0 LV Size 195.00 GB Current LE 49920 COW-table size 8.00 GB COW-table LE 2048 Allocated to snapshot 0.00% Snapshot chunk size 8.00 KB Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:1 --- Physical volumes --- PV Name /dev/hda8 PV UUID 1byvJe-bX7P-i5rp-bPnW-BVRC-PXw2-NhA9tq PV Status allocatable Total PE / Free PE 23456 / 105 PV Name /dev/hdb1 PV UUID 1WORbE-Fhu2-xETa-D3fe-qce5-lxBV-gWc7uq PV Status allocatable Total PE / Free PE 28617 / 0 ----------------------------------------------- "vgdisplay -v" with snapshot mounted ----------------------------------------------- --- Volume group --- VG Name vg_rnscserver_01 System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 17 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 1 Max PV 0 Cur PV 2 Act PV 2 VG Size 203.41 GB PE Size 4.00 MB Total PE 52073 Alloc PE / Size 51968 / 203.00 GB Free PE / Size 105 / 420.00 MB VG UUID E4kcZk-Y73I-0vrE-JvT5-Sf8t-FDId-UQs50R --- Logical volume --- LV Name /dev/vg_rnscserver_01/lv_nethome_01 VG Name vg_rnscserver_01 LV UUID TPxEJ5-rDSD-ZypA-92l3-kmbY-0Cva-KORW2N LV Write Access read/write LV snapshot status source of /dev/vg_rnscserver_01/snap [active] LV Status available # open 1 LV Size 195.00 GB Current LE 49920 Segments 2 Allocation inherit Read ahead sectors 0 Block device 253:0 --- Logical volume --- LV Name /dev/vg_rnscserver_01/snap VG Name vg_rnscserver_01 LV UUID 6o7IP6-Sei1-8buE-SC0f-57E5-8uaE-0n7gBS LV Write Access read/write LV snapshot status active destination for /dev/vg_rnscserver_01/lv_nethome_01 LV Status available # open 1 LV Size 195.00 GB Current LE 49920 COW-table size 8.00 GB COW-table LE 2048 Allocated to snapshot 0.01% Snapshot chunk size 8.00 KB Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:1 --- Physical volumes --- PV Name /dev/hda8 PV UUID 1byvJe-bX7P-i5rp-bPnW-BVRC-PXw2-NhA9tq PV Status allocatable Total PE / Free PE 23456 / 105 PV Name /dev/hdb1 PV UUID 1WORbE-Fhu2-xETa-D3fe-qce5-lxBV-gWc7uq PV Status allocatable Total PE / Free PE 28617 / 0 --------------------------------------------------------------------- "vgdisplay-v" after booting, boot fails, in single user mode --------------------------------------------------------------------- --- Volume group --- VG Name vg_rnscserver_01 System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 14 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 0 Max PV 0 Cur PV 2 Act PV 2 VG Size 203.41 GB PE Size 4.00 MB Total PE 52073 Alloc PE / Size 51968 / 203.00 GB Free PE / Size 105 / 420.00 MB VG UUID E4kcZk-Y73I-0vrE-JvT5-Sf8t-FDId-UQs50R --- Logical volume --- LV Name /dev/vg_rnscserver_01/lv_nethome_01 VG Name vg_rnscserver_01 LV UUID TPxEJ5-rDSD-ZypA-92l3-kmbY-0Cva-KORW2N LV Write Access read/write LV snapshot status source of /dev/vg_rnscserver_01/snap [INACTIVE] LV Status available # open 0 LV Size 195.00 GB Current LE 49920 Segments 2 Allocation inherit Read ahead sectors 0 Block device 253:1 --- Logical volume --- LV Name /dev/vg_rnscserver_01/snap VG Name vg_rnscserver_01 LV UUID dPq31r-02ZB-6XzT-AlPN-o3qj-f5na-xh8x01 LV Write Access read/write LV snapshot status INACTIVE destination for /dev/vg_rnscserver_01/lv_nethome_01 LV Status NOT available LV Size 195.00 GB Current LE 49920 COW-table size 8.00 GB COW-table LE 2048 Snapshot chunk size 8.00 KB Segments 1 Allocation inherit Read ahead sectors 0 --- Physical volumes --- PV Name /dev/hda8 PV UUID 1byvJe-bX7P-i5rp-bPnW-BVRC-PXw2-NhA9tq PV Status allocatable Total PE / Free PE 23456 / 105 PV Name /dev/hdb1 PV UUID 1WORbE-Fhu2-xETa-D3fe-qce5-lxBV-gWc7uq PV Status allocatable Total PE / Free PE 28617 / 0 ---------------------------------------------------------------------------------------------- "vgdisplay -v" in single user mode after failed boot, after snapshot is removed ---------------------------------------------------------------------------------------------- --- Volume group --- VG Name vg_rnscserver_01 System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 15 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 0 Max PV 0 Cur PV 2 Act PV 2 VG Size 203.41 GB PE Size 4.00 MB Total PE 52073 Alloc PE / Size 49920 / 195.00 GB Free PE / Size 2153 / 8.41 GB VG UUID E4kcZk-Y73I-0vrE-JvT5-Sf8t-FDId-UQs50R --- Logical volume --- LV Name /dev/vg_rnscserver_01/lv_nethome_01 VG Name vg_rnscserver_01 LV UUID TPxEJ5-rDSD-ZypA-92l3-kmbY-0Cva-KORW2N LV Write Access read/write LV Status available # open 0 LV Size 195.00 GB Current LE 49920 Segments 2 Allocation inherit Read ahead sectors 0 Block device 253:1 --- Physical volumes --- PV Name /dev/hda8 PV UUID 1byvJe-bX7P-i5rp-bPnW-BVRC-PXw2-NhA9tq PV Status allocatable Total PE / Free PE 23456 / 2153 PV Name /dev/hdb1 PV UUID 1WORbE-Fhu2-xETa-D3fe-qce5-lxBV-gWc7uq PV Status allocatable Total PE / Free PE 28617 / 0 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.