[linux-lvm] Does pvcreate destroy data if run on an existing PV?
Lance Reed
lreed at ruckusnetwork.com
Sun May 1 14:35:57 UTC 2005
I am having a problem with a LVM 1 implemenation.
LVM version info:
# rpm -qa | grep lvm
lvm-1.0.3-1_MVD_SNAP
# pvcreate --version
pvcreate: Logical Volume Manager 1.0.3
Heinz Mauelshagen, Sistina Software 19/02/2002 (IOP 10)
Kernel info:
# uname -a
Linux rawstore 2.4.19-116_MVD_SNAPenterprise #1 SMP Fri Dec 5 08:26:34
CST 2003 i686 unknown
I have a NAS head that connects to Large storage arrays using LSI SCSI
cards.
Drivers: Fusion MPT SCSI Host driver 2.05.00 ; mptscsih ; mptbase
For some reason the array loacked up, and the kernel was not able to
talk to two of the SCSI devices,
which are two scsi devices (sdc and sde) that make up a VG, each SCSI
device being PV's for the VG.
When the system and storage array were rebooted, the linux host was not
able to use the LVM VG that
was having the SCSI issues. It appears that before the reboot, the
metadata and the .conf file for
say that the VG for DiskPoolC should use /dev/sdc and /dev/sde1.
Currently the system after the reboot
sees /dev/sdc and /dev/sde. The system no longer see's the /dev/sde1
partition.
We have attempted to do a vgcfgrestore using the DiskPoolC.conf which
is only 2 days old.
The restore of the metadata for /dev/sdc matches and works fine.
The restore of the metadata for /dev/sde throws errors about not finding
/dev/sde1.
So we tried susing the -o option:
[root at rawstore log]# vgcfgrestore -v -o /dev/sde1 -n DiskPoolC
/dev/sde vgcfgrestore -- INFO: using backup file
"/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- locking logical volume manager
vgcfgrestore -- restoring volume group "DiskPoolC" from
"/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- checking existence of "/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- reading volume group data for "DiskPoolC" from
"/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- reading physical volume data for "DiskPoolC" from
"/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- reading logical volume data for "DiskPoolC" from
"/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- checking volume group consistency of "DiskPoolC"
vgcfgrestore -- checking volume group consistency of "DiskPoolC"
vgcfgrestore -- reading physical volume "/dev/sde"
vgcfgrestore -- ERROR "pv_read(): PV identifier invalid" reading
physical volume "/dev/sde"
So, at this point I am thinking that the placeholder for the PV metadat
is corrupt.
So, my question is, can I run a pvcreate on the PV, which is currently
not active, reset
the pv area, then use vgcfgrestore to restore the metadate, and allow
the PV to be recognized
vy vgscan. If so, will this work without destroying all the data that
exists on the PV we are
running the pvcreate on?
I have seen one reference to this in a web search that say it might
work, but I have also seen
many refernces to using ovcreate to destory data on a disk. This is on
fresh disks, being setup
for LVM. I was hoping that running pvcreate on an eixsting PV will on
reinitiakize the Metadata
area, and not touch the data on the PV itself.
I am currently do a dd to replicate the /sde disk to another disk to
experriment with recovery techniques.
Also, any idea if there is a way to do a pvmove or somethign to attempt
to move the PV data over to a fresh
disk, and load the metadata there?
Anybody have any idea of what could have caused this behavior and how
can we recover?
Thanks so much for any assistane in this matter or any suggestions!
Cheers!
Lance
LVM info / tests
-----------
[root at rawstore log]# vgcfgrestore -v -o /dev/sde1 -n DiskPoolC /dev/sde
vgcfgrestore -- INFO: using backup file "/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- locking logical volume manager
vgcfgrestore -- restoring volume group "DiskPoolC" from
"/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- checking existence of "/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- reading volume group data for "DiskPoolC" from
"/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- reading physical volume data for "DiskPoolC" from
"/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- reading logical volume data for "DiskPoolC" from
"/etc/lvmconf/DiskPoolC.conf"
vgcfgrestore -- checking volume group consistency of "DiskPoolC"
vgcfgrestore -- checking volume group consistency of "DiskPoolC"
vgcfgrestore -- reading physical volume "/dev/sde"
vgcfgrestore -- ERROR "pv_read(): PV identifier invalid" reading
physical volume "/dev/sde"
[root at rawstore log]# lvmdiskscan
lvmdiskscan -- reading all disks / partitions (this may take a while...)
lvmdiskscan -- /dev/sda1 [ 800.98 MB] Primary LINUX native
partition [0x83]
lvmdiskscan -- /dev/sda2 [ 1 GB] Primary LINUX swap partition
[0x82]
lvmdiskscan -- /dev/sda3 [ 401 MB] Primary LINUX native
partition [0x83]
lvmdiskscan -- /dev/sda4 [ 1.59 TB] DOS extended partition [0x05]
lvmdiskscan -- /dev/sda5 [ 800.98 MB] Extended LINUX native
partition [0x83]
lvmdiskscan -- /dev/sda6 [ 500.98 MB] Extended LINUX native
partition [0x83]
lvmdiskscan -- /dev/sda7 [ 1.59 TB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/sdb [ 1.59 TB] USED LVM whole disk
lvmdiskscan -- /dev/sdc [ 814.21 GB] USED LVM whole disk
lvmdiskscan -- /dev/sdd1 [ 814.21 GB] Primary LINUX native
partition [0x83]
lvmdiskscan -- /dev/sde [ 814.21 GB] free whole disk
lvmdiskscan -- /dev/sdf [ 814.21 GB] USED LVM whole disk
lvmdiskscan -- 6 disks
lvmdiskscan -- 4 whole disks
lvmdiskscan -- 0 loop devices
lvmdiskscan -- 0 multiple devices
lvmdiskscan -- 0 network block devices
lvmdiskscan -- 8 partitions
lvmdiskscan -- 1 LVM physical volume partition
--- Volume group ---
VG Name DiskPoolC
VG Access read/write
VG Status NOT available/resizable
VG # 2
MAX LV 256
Cur LV 4
Open LV 0
MAX LV Size 2 TB
Max PV 256
Cur PV 2
Act PV 2
VG Size 1.59 TB
PE Size 64 MB
Total PE 26052
Alloc PE / Size 20988 / 1.28 TB
Free PE / Size 5064 / 316.50 GB
VG UUID EXoF2l-PdM7-xYtk-F7hl-N956-Pjag-HN24Iz
--- Logical volume ---
LV Name /dev/DiskPoolC/lvol1
VG Name DiskPoolC
LV Write Access read/write
LV Status NOT available
LV # 1
# open 0
LV Size 395.88 GB
Current LE 6334
Allocated LE 6334
Allocation next free
Read ahead sectors 10000
Block device 58:3
--- Logical volume ---
LV Name /dev/DiskPoolC/lvol2
VG Name DiskPoolC
LV Write Access read/write
LV Status NOT available
LV # 2
# open 0
LV Size 465.06 GB
Current LE 7441
Allocated LE 7441
Allocation next free
Read ahead sectors 10000
Block device 58:4
--- Logical volume ---
LV Name /dev/DiskPoolC/lvol3
VG Name DiskPoolC
LV Write Access read/write
LV Status NOT available
LV # 3
# open 0
LV Size 440 GB
Current LE 7040
Allocated LE 7040
Allocation next free
Read ahead sectors 10000
Block device 58:7
--- Logical volume ---
LV Name /dev/DiskPoolC/lvol4
VG Name DiskPoolC
LV Write Access read/write
LV Status NOT available
LV # 4
# open 0
LV Size 10.81 GB
Current LE 173
Allocated LE 173
Allocation next free
Read ahead sectors 10000
Block device 58:9
--- Physical volume ---
PV Name /dev/sde1
VG Name DiskPoolC
PV Size 814.21 GB [1707516657 secs] / NOT usable 64.19 MB
[LVM: 178 KB]
PV# 1
PV Status available
Allocatable yes (but full)
Cur LV 3
PE Size (KByte) 65536
Total PE 13026
Free PE 0
Allocated PE 13026
PV UUID TS7aiH-Mz1Z-WBVJ-0UEx-VITp-6h0V-DztSM7
--- Physical volume ---
PV Name /dev/sdc
VG Name DiskPoolC
PV Size 814.21 GB [1707517952 secs] / NOT usable 64.19 MB
[LVM: 178 KB]
PV# 2
PV Status available
Allocatable yes
Cur LV 4
PE Size (KByte) 65536
Total PE 13026
Free PE 5064
Allocated PE 7962
PV UUID a9k9We-e3l8-V0M9-cQlZ-mJha-EDTW-fvSG5Q
Relevant Boot messages:
Apr 30 16:20:03 rawstore kernel: LVM version 1.0.3(19/02/2002) module loaded
Apr 30 16:20:03 rawstore kernel: Journalled Block Device driver loaded
Apr 30 16:20:03 rawstore kernel: SGI XFS CVS-2002-11-01_06:00_UTC with
ACLs, quota, no debug enabled
Apr 30 16:20:03 rawstore kernel: SCSI subsystem driver Revision: 1.00
Apr 30 16:20:03 rawstore kernel: kmod: failed to exec /sbin/modprobe -s
-k scsi_hostadapter, errno = 2
Apr 30 16:20:03 rawstore kernel: Fusion MPT base driver 2.05.00
Apr 30 16:20:03 rawstore kernel: Copyright (c) 1999-2002 LSI Logic
Corporation
Apr 30 16:20:03 rawstore kernel: mptbase: Initiating ioc0 bringup
Apr 30 16:20:03 rawstore kernel: ioc0: 53C1030: Capabilities={Initiator}
Apr 30 16:20:03 rawstore kernel: mptbase: Initiating ioc1 bringup
Apr 30 16:20:03 rawstore kernel: ioc1: 53C1030: Capabilities={Initiator}
Apr 30 16:20:03 rawstore kernel: mptbase: Initiating ioc2 bringup
Apr 30 16:20:03 rawstore kernel: ioc2: 53C1030: Capabilities={Initiator}
Apr 30 16:20:03 rawstore kernel: mptbase: Initiating ioc3 bringup
Apr 30 16:20:03 rawstore kernel: ioc3: 53C1030: Capabilities={Initiator}
Apr 30 16:20:03 rawstore kernel: mptbase: 4 MPT adapters found, 4 installed.
Apr 30 16:20:03 rawstore kernel: Fusion MPT SCSI Host driver 2.05.00
Apr 30 16:20:03 rawstore kernel: scsi0 : ioc0: LSI53C1030,
FwRev=01030700h, Ports=1, MaxQ=222, IRQ=28
Apr 30 16:20:03 rawstore kernel: scsi1 : ioc1: LSI53C1030,
FwRev=01030700h, Ports=1, MaxQ=222, IRQ=29
Apr 30 16:20:03 rawstore kernel: scsi2 : ioc2: LSI53C1030,
FwRev=01030700h, Ports=1, MaxQ=222, IRQ=24
Apr 30 16:20:03 rawstore kernel: scsi3 : ioc3: LSI53C1030,
FwRev=01030700h, Ports=1, MaxQ=222, IRQ=27
Apr 30 16:20:03 rawstore kernel: Vendor: WINSYS Model: Flashdisk
G7 Rev: 331J
Apr 30 16:20:03 rawstore kernel: Type:
Direct-Access ANSI SCSI revision: 03
Apr 30 16:20:03 rawstore kernel: Vendor: WINSYS Model: Flashdisk
G7 Rev: 331J
Apr 30 16:20:03 rawstore kernel: Type:
Direct-Access ANSI SCSI revision: 03
Apr 30 16:20:03 rawstore kernel: Vendor: WINSYS Model: Flashdisk
G7 Rev: 334C
Apr 30 16:20:03 rawstore kernel: Type:
Direct-Access ANSI SCSI revision: 03
Apr 30 16:20:03 rawstore keytable: ^[[60G
Apr 30 16:20:03 rawstore kernel: Vendor: WINSYS Model: Flashdisk
G7 Rev: 334C
Apr 30 16:20:03 rawstore kernel: Type:
Direct-Access ANSI SCSI revision: 03
Apr 30 16:20:03 rawstore kernel: Vendor: WINSYS Model: Flashdisk
G7 Rev: 334C
Apr 30 16:20:03 rawstore kernel: Type:
Direct-Access ANSI SCSI revision: 03
Apr 30 16:20:03 rawstore kernel: Vendor: WINSYS Model: Flashdisk
G7 Rev: 334C
Apr 30 16:20:03 rawstore kernel: Type:
Direct-Access ANSI SCSI revision: 03
Apr 30 16:20:03 rawstore kernel: Attached scsi disk sda at scsi0,
channel 0, id 0, lun 0
Apr 30 16:20:03 rawstore kernel: Attached scsi disk sdb at scsi1,
channel 0, id 0, lun 0
Apr 30 16:20:03 rawstore kernel: Attached scsi disk sdc at scsi2,
channel 0, id 0, lun 0
Apr 30 16:20:03 rawstore kernel: Attached scsi disk sdd at scsi2,
channel 0, id 0, lun 1
Apr 30 16:20:03 rawstore kernel: Attached scsi disk sde at scsi3,
channel 0, id 0, lun 0
Apr 30 16:20:03 rawstore kernel: Attached scsi disk sdf at scsi3,
channel 0, id 0, lun 1
Apr 30 16:20:03 rawstore kernel: SCSI device sda: -879931392 512-byte
hdwr sectors (-450524 MB)
Apr 30 16:20:03 rawstore kernel: Partition check:
Apr 30 16:20:03 rawstore kernel: sda: sda1 sda2 sda3 sda4 < sda5 sda6
sda7 >
Apr 30 16:20:03 rawstore kernel: SCSI device sdb: -879931392 512-byte
hdwr sectors (-450524 MB)
Apr 30 16:20:03 rawstore kernel: sdb: unknown partition table
Apr 30 16:20:03 rawstore kernel: SCSI device sdc: 1707517952 512-byte
hdwr sectors (-225261 MB)
Apr 30 16:20:03 rawstore kernel: sdc: unknown partition table
Apr 30 16:20:03 rawstore kernel: SCSI device sdd: 1707517952 512-byte
hdwr sectors (-225261 MB)
Apr 30 16:20:03 rawstore kernel: sdd: sdd1
Apr 30 16:20:03 rawstore keytable:
Apr 30 16:20:03 rawstore kernel: SCSI device sde: 1707517952 512-byte
hdwr sectors (-225261 MB)
Apr 30 16:20:03 rawstore keytable: Loading system font:
Apr 30 16:20:03 rawstore kernel: sde: unknown partition table
Apr 30 16:20:03 rawstore kernel: SCSI device sdf: 1707517952 512-byte
hdwr sectors (-225261 MB)
Apr 30 16:20:03 rawstore kernel: sdf: unknown partition table
Apr 30 16:20:03 rawstore kernel: kjournald starting. Commit interval 5
seconds
Apr 30 16:20:03 rawstore kernel: EXT3-fs: mounted filesystem with
ordered data mode.
Apr 30 16:20:03 rawstore kernel: VFS: Mounted root (ext3 filesystem)
readonly.
Apr 30 16:20:03 rawstore kernel: Trying to move old root to /initrd ...
failed
Apr 30 16:20:03 rawstore kernel: Unmounting old root
Apr 30 16:20:04 rawstore kernel: Trying to free ramdisk memory ... okay
Apr 30 16:20:04 rawstore kernel: Freeing unused kernel memory: 128k freed
Apr 30 16:20:04 rawstore kernel: EXT3 FS 2.4-0.9.17, 10 Jan 2002 on
sd(8,1), internal journal
Apr 30 16:20:04 rawstore kernel: Adding Swap: 1049592k swap-space
(priority -1)
Apr 30 16:20:04 rawstore kernel: EXT3 FS 2.4-0.9.17, 10 Jan 2002 on
sd(8,1), internal journal
Apr 30 16:20:04 rawstore kernel: MVD SnapFS(v2.0.2) loaded
Apr 30 16:20:04 rawstore kernel: loop: loaded (max 8 devices)
Apr 30 16:20:04 rawstore kernel: kjournald starting. Commit interval 5
seconds
Apr 30 16:20:04 rawstore kernel: EXT3 FS 2.4-0.9.17, 10 Jan 2002 on
sd(8,3), internal journal
Apr 30 16:20:04 rawstore kernel: EXT3-fs: mounted filesystem with
ordered data mode.
Apr 30 16:20:04 rawstore kernel: kjournald starting. Commit interval 5
seconds
Apr 30 16:20:04 rawstore kernel: EXT3 FS 2.4-0.9.17, 10 Jan 2002 on
sd(8,5), internal journal
Apr 30 16:20:04 rawstore kernel: EXT3-fs: mounted filesystem with
ordered data mode.
Apr 30 16:20:04 rawstore kernel: XFS mounting filesystem lvm(58,1)
Apr 30 16:20:04 rawstore keytable:
Apr 30 16:20:04 rawstore kernel: XFS mounting filesystem lvm(58,2)
Apr 30 16:20:04 rawstore rc: Starting keytable: succeeded
Apr 30 16:20:04 rawstore kernel: XFS mounting filesystem lvm(58,0)
Apr 30 16:20:04 rawstore kernel: XFS mounting filesystem lvm(58,5)
Apr 30 16:20:04 rawstore kernel: XFS mounting filesystem lvm(58,6)
Apr 30 16:20:04 rawstore kernel: XFS mounting filesystem lvm(58,8)
Apr 30 16:20:04 rawstore kernel: XFS mounting filesystem lvm(58,10)
Apr 30 16:20:04 rawstore kernel: ip_conntrack (8192 buckets, 65536 max)
Apr 30 16:20:04 rawstore kernel: Intel(R) PRO/1000 Network Driver -
version 5.2.20
Apr 30 16:20:04 rawstore kernel: Copyright (c) 1999-2003 Intel Corporation.
Apr 30 16:20:04 rawstore kernel: eth0: Intel(R) PRO/1000 Network Connection
Apr 30 16:20:04 rawstore kernel: eth1: Intel(R) PRO/1000 Network Connection
Apr 30 16:20:04 rawstore random: Initializing random number generator:
succeeded
Apr 30 16:20:04 rawstore mount: mount: special device
/dev/DiskPoolC/lvol1 does not exist
Apr 30 16:20:04 rawstore mount: mount: special device
/dev/DiskPoolC/lvol2 does not exist
Apr 30 16:20:04 rawstore mount: mount: special device
/dev/DiskPoolC/lvol3 does not exist
Apr 30 16:20:04 rawstore mount: mount: special device
/dev/DiskPoolC/lvol4 does not exist
Apr 30 16:20:04 rawstore netfs: Mounting other filesystems: failed
Apr 30 16:20:04 rawstore ntpd[708]: ntpd 4.0.99k Thu Apr 5 14:21:47 EDT
2001 (1)
Apr 30 16:20:04 rawstore ntpd: ntpd startup succeeded
Apr 30 16:20:04 rawstore ntpd[708]: precision = 8 usec
Apr 30 16:20:04 rawstore ntpd[708]: using kernel phase-lock loop 0040
Apr 30 16:20:04 rawstore ntpd[708]: frequency initialized 56.219 from
/etc/ntp/drift
Apr 30 16:20:04 rawstore ntpd[708]: using kernel phase-lock loop 0041
Apr 30 16:20:04 rawstore atd: atd startup succeeded
Apr 30 16:20:04 rawstore ucd-snmp[733]: UCD-SNMP version 4.2.5
Apr 30 16:20:04 rawstore snmpd: snmpd startup succeeded
Apr 30 16:20:04 rawstore sshd: Starting sshd:
Apr 30 16:20:04 rawstore rc: Starting sshd: succeeded
Apr 30 16:19:58 rawstore rc.sysinit: Mounting proc filesystem: succeeded
Apr 30 16:19:58 rawstore sysctl: net.ipv4.ip_forward = 0
Apr 30 16:19:58 rawstore sysctl: net.ipv4.conf.all.rp_filter = 1
Apr 30 16:19:58 rawstore rc.sysinit: Configuring kernel parameters:
succeeded
Apr 30 16:19:58 rawstore date: Sat Apr 30 16:19:58 GMT 2005
Apr 30 16:19:58 rawstore rc.sysinit: Setting clock (localtime): Sat Apr
30 16:19:58 GMT 2005 succeeded
Apr 30 16:19:58 rawstore rc.sysinit: Loading default keymap succeeded
Apr 30 16:19:58 rawstore rc.sysinit: Setting default font (lat0-sun16):
succeeded
Apr 30 16:19:58 rawstore rc.sysinit: Activating swap partitions: succeeded
Apr 30 16:19:58 rawstore rc.sysinit: Setting hostname rawstore: succeeded
Apr 30 16:19:58 rawstore fsck: /: clean, 35343/102592 files,
125303/205052 blocks
Apr 30 16:19:58 rawstore rc.sysinit: Checking root filesystem succeeded
Apr 30 16:19:58 rawstore rc.sysinit: Remounting root filesystem in
read-write mode: succeeded
Apr 30 16:19:58 rawstore rc.sysinit: Finding module dependencies: succeeded
Apr 30 16:19:58 rawstore fsck: /tmp: clean, 12/102816 files,
21224/410624 blocks
Apr 30 16:19:58 rawstore rc.sysinit: Checking filesystems succeeded
Apr 30 16:19:58 rawstore fsck: /var: clean, 523/102592 files,
32046/205052 blocks
Apr 30 16:20:00 rawstore vgscan: vgscan -- reading all physical volumes
(this may take a while...)
Apr 30 16:20:00 rawstore rc.sysinit: Scan available volume groups: succeeded
Apr 30 16:20:00 rawstore vgscan: vgscan -- found active volume group
DiskPoolA
Apr 30 16:20:00 rawstore vgscan: vgscan -- found active volume group
DiskPoolB
Apr 30 16:20:00 rawstore vgscan: vgscan -- /etc/lvmtab and /etc/lvmtab.d
successfully created
Apr 30 16:20:00 rawstore vgscan: vgscan -- WARNING: This program does
not do a VGDA backup of your volume groups
Apr 30 16:20:00 rawstore vgscan: vgscan -- ERROR vg_read_with_pv_and_lv():
Apr 30 16:20:01 rawstore vgchange: vgchange -- volume group DiskPoolA
successfully activated
Apr 30 16:20:01 rawstore vgchange: vgchange -- volume group DiskPoolB
successfully activated
Apr 30 16:20:01 rawstore rc.sysinit: Setting up LVM: succeeded
Apr 30 16:20:01 rawstore mount: mount: special device
/dev/DiskPoolC/lvol1 does not exist
Apr 30 16:20:01 rawstore mount: mount: special device
/dev/DiskPoolC/lvol2 does not exist
Apr 30 16:20:01 rawstore mount: mount: special device
/dev/DiskPoolC/lvol3 does not exist
Apr 30 16:20:01 rawstore mount: mount: special device
/dev/DiskPoolC/lvol4 does not exist
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