[linux-lvm] pvmove problem

[Tim Randles]

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Hello,

I'm trying to pvmove from a dying disk to a new disk.  I'm using version 1.0.7 
of the LVM tools.  I know that the source disk has bad sectors on it.  I 
figured one of two things would happen with the pvmove:
1)  pvmove would work fine up to the bad sectors, where it would error with 
I/O read errors.  I would then restart the pvmove with PEs that are past the 
bad sectors on the source disk and things would finish.
2)  pvmove would work fine up to the bad sectors, where it would encounter I/O 
read errors.  pvmove would report the errors and say the data is 
lost/corrupt, but continue reading valid/skipping bad sectors until it 
finished.
I fear that I'm being naive about how pvmove will handle bad sectors...  At 
any rate, the error I'm getting is:

[root at mills tools]# ./pvmove -vv /dev/sdb1
pvmove -- checking name of source physical volume "/dev/sdb1"
pvmove -- locking logical volume manager
pvmove -- reading data of source physical volume from "/dev/sdb1"
pvmove -- checking volume group existence
pvmove -- reading data of volume group "vg1" from lvmtab
pvmove -- checking volume group consistency of "vg1"
pvmove -- searching for source physical volume "/dev/sdb1" in volume group 
"vg1"
pvmove -- building list of possible destination physical volumes
pvmove -- checking volume group activity
pvmove -- moving physical extents in active volume group "vg1"
pvmove -- WARNING: if you lose power during the move you may need
        to restore your LVM metadata from backup!
pvmove -- do you want to continue? [y/n] y
pvmove -- starting to move extents away from physical volume "/dev/sdb1"
pvmove -- checking for enough free physical extents in "vg1"
lv: /dev/vg1/lv7[7]  old_dev: 08:17  new_dev: 08:33  old_pe_sector: 4186488  
new_pe_sector: 4186488
pvmove -- opening output physical volume "/dev/sdc1"
pvmove -- llseeking input physical volume "/dev/sdb1"
pvmove -- llseeking output physical volume "/dev/sdc1"
pvmove -- /dev/sdb1 [PE 510 [lv7 [LE 5650]] -> /dev/sdc1 [PE 510] [1/4590]
pvmove -- locking physical extent 510 of "/dev/sdb1" in kernel
pvmove -- about to read input physical volume "/dev/sdb1" and to write output 
physical volume "/dev/sdc1"
pvmove -- ERROR reading input physical volume "/dev/sdb1" (still 131072 bytes 
to read)
pvmove -- ERROR "pv_move_pe(): read input PV" moving physical extents


When I try to specify any random PE > 510 I get:


[root at mills tools]# ./pvmove -vv /dev/sdb1:530 /dev/sdc1
pvmove -- checking name of source physical volume "/dev/sdb1"
pvmove -- locking logical volume manager
pvmove -- reading data of source physical volume from "/dev/sdb1"
pvmove -- checking volume group existence
pvmove -- reading data of volume group "vg1" from lvmtab
pvmove -- checking volume group consistency of "vg1"
pvmove -- searching for source physical volume "/dev/sdb1" in volume group 
"vg1"
pvmove -- building list of possible destination physical volumes
pvmove -- checking destination physical volume names in command line
pvmove -- checking volume group activity
pvmove -- moving physical extents in active volume group "vg1"
pvmove -- WARNING: if you lose power during the move you may need
        to restore your LVM metadata from backup!
pvmove -- do you want to continue? [y/n] y
pvmove -- starting to move extents away from physical volume "/dev/sdb1"
pvmove -- checking for enough free physical extents in "vg1"
lv: /dev/vg1/lv7[7]  old_dev: 08:17  new_dev: 08:33  old_pe_sector: 4350328  
new_pe_sector: 4186488
pvmove -- opening output physical volume "/dev/sdc1"
pvmove -- llseeking input physical volume "/dev/sdb1"
pvmove -- llseeking output physical volume "/dev/sdc1"
pvmove -- /dev/sdb1 [PE 530 [lv7 [LE 5670]] -> /dev/sdc1 [PE 510] [1/1]
pvmove -- locking physical extent 530 of "/dev/sdb1" in kernel
pvmove -- about to read input physical volume "/dev/sdb1" and to write output 
physical volume "/dev/sdc1"
pvmove -- ERROR reading input physical volume "/dev/sdb1" (still 4194304 bytes 
to read)
pvmove -- ERROR "pv_move_pe(): read input PV" moving physical extents


Is there anything I can do to get the pvmove to finish?

Thanks,
Tim

- -- 
Tim Randles
Unix Administrator and Webmaster
The Ohio State University
Department of Physics Computing Facility
Phone: 292-2630
Email: tcr at pacific.mps.ohio-state.edu
PGP key: http://www.physics.ohio-state.edu/~tcr/pgp.txt


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