I've been happily using LVM for a couple of months now to aggregate a bunch of disks together into one logical drive for a Debian box that I use as an over-the-network backup of my various other boxen. Thus far, it's been great.
Recently however, I started getting parity errors on one of the drives that's in my logical volume. It's a tiny drive that I threw in there merely because I had it, and its loss will not be missed. I just want to remove it altogether and pretend like it never existed. I'd like to preserve the data that's on the drive, if possible, but if not -- I'm ok with losing it, since that data will come back next time I run my backups.
I read the FAQ, the HOWTO and scanned the mailing list archives and it appears that I need to do a pvmove to get the data off of that drive, and then a vgreduce to remove it from the volume group. Unfortunately, when I try to do the pvmove, I get:
% pvmove /dev/sdb No extents available for allocation
I'm assuming that this means that there's nowhere to move the data that is on /dev/sdb. I further assume this means that I need some free physical extents somewhere. This is where I'm confused. When I set up LVM, I allocated all of my spare drives to it. So I have a 271GB
logical volume of which I'm using only 32GB. So I know that I have free space to move the data around; I just don't know how to do it.
So. How do I get more free physical extents inside my logical volume? I feel confident that there's an easy answer for this that I overlooked, but I can't find it. Hopefully the context below will help a bit.
Thanks in advance, -Bharat
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% lvdisplay --- Logical volume --- LV Name /dev/data/data1 VG Name data LV UUID abrnMJ-2MqB-tkQl-g8g6-xYXx-KLE8-PMbNdG LV Write Access read/write LV Status available # open 1 LV Size 275.19 GB Current LE 70448 Segments 4 Allocation inherit Read ahead sectors 0 Block device 254:0
% vgdisplay --- Volume group --- VG Name data System ID Format lvm2 Metadata Areas 4 Metadata Sequence No 8 VG Access read/write VG Status resizable MAX LV 255 Cur LV 1 Open LV 1 Max PV 255 Cur PV 4 Act PV 4 VG Size 275.19 GB PE Size 4.00 MB Total PE 70448 Alloc PE / Size 70448 / 275.19 GB Free PE / Size 0 / 0 VG UUID PjytLd-X99E-iUTf-drKH-42dl-2QHO-6qBcmB
% pvdisplay --- Physical volume --- PV Name /dev/sda VG Name data PV Size 34.20 GB / not usable 0 Allocatable yes (but full) PE Size (KByte) 4096 Total PE 8755 Free PE 0 Allocated PE 8755 PV UUID q8ElTG-XOoB-nQy6-8VTU-wZlR-uj3b-Vrnxlp
--- Physical volume --- PV Name /dev/sdb VG Name data PV Size 8.55 GB / not usable 0 Allocatable yes (but full) PE Size (KByte) 4096 Total PE 2189 Free PE 0 Allocated PE 2189 PV UUID dDZOFg-nQES-cCgO-l5KF-9JIz-i2hh-OpcP1V
--- Physical volume --- PV Name /dev/sdc VG Name data PV Size 34.25 GB / not usable 0 Allocatable yes (but full) PE Size (KByte) 4096 Total PE 8768 Free PE 0 Allocated PE 8768 PV UUID B8dtE3-gdB7-aakQ-p4EY-CysX-b6VU-LrBYmc
--- Physical volume --- PV Name /dev/hde7 VG Name data PV Size 198.19 GB / not usable 0 Allocatable yes (but full) PE Size (KByte) 4096 Total PE 50736 Free PE 0 Allocated PE 50736 PV UUID bz31lu-ck6I-439l-IbWs-hb40-g6rm-rWE3oq
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