Hi all,
I am writing here with hope somebody had already run and successfully
resolved this issue. I am on CentOS 4.4 with kernel
kernel-smp-2.6.9-200.0.2.EL.iworx.x86_64.rpm. I've been in the process
of creating a backup script which uses LVM snapshoting feature to
backup a snapshot of root filesystem instead of live filesystem.
During testing phase on testing CentOS installation, I've been able to
successfully create, mount, unmount and remove root filesystem
snapshots. On live production system, I've also successfully created,
mounted and unmounted root filesystem snapshot, but I CANNOT REMOVE IT
in any way.
lvremove -f gives following output:
[CODE]File descriptor 3 left open
File descriptor 5 left open
File descriptor 7 left open
/dev/cdrom: open failed: Read-only file system
Can't remove open logical volume "SSsystem"[/CODE]
tried also to deactivate the snapshot using lvchange -an command:
[CODE]File descriptor 3 left open
File descriptor 5 left open
File descriptor 7 left open
/dev/cdrom: open failed: Read-only file system
Can't change snapshot logical volume "SSsystem"[/CODE]
lvdisplay outputs this:
[CODE]File descriptor 3 left open
File descriptor 5 left open
File descriptor 7 left open
--- Logical volume ---
LV Name /dev/VGdb/LVdb
VG Name VGdb
LV UUID R4mtQ4-Idyo-SRiU-EfLg-TFM6-NZN2-Cd1kgv
LV Write Access read/write
LV Status available
# open 1
LV Size 14.66 GB
Current LE 469
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:1
--- Logical volume ---
LV Name /dev/VGsystem/LVsystem
VG Name VGsystem
LV UUID HusBAX-tbxn-6283-zap5-Cihe-K1AX-jKDbk7
LV Write Access read/write
LV snapshot status source of
/dev/VGsystem/SSsystem [active]
LV Status available
# open 1
LV Size 31.25 GB
Current LE 1000
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0
--- Logical volume ---
LV Name /dev/VGsystem/SSsystem
VG Name VGsystem
LV UUID qohvbp-yo1c-SFGv-suM1-9QC9-OwA3-TpX1i0
LV Write Access read/write
LV snapshot status active destination for /dev/VGsystem/LVsystem
LV Status available
# open 1
LV Size 31.25 GB
Current LE 1000
COW-table size 2.66 GB
COW-table LE 85
Allocated to snapshot 2.32%
Snapshot chunk size 8.00 KB
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:4[/CODE]
At this very time I am in a situation when the snapshot space is
slowly filling and I am afraid to reboot, manually fill the snapshot
(with hope it will automatically deactivate) or try anything else,
because this is live production system placed in data center and
currently I have no physical access to it - only remote through SSH2.
I'll be grateful for any ideas which might help to resolve this issue
without loosing any data. Thanks very much.
Martin
Here is output of uname -a:
[CODE]Linux xxxx.xxx.xxx 2.6.9-200.0.2.EL.iworxsmp #1 SMP Fri Aug 4
15:25:06 EDT 2006 x86_64 x86_64 x86_64 GNU/Linux[/CODE]
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