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Old 07-20-2010, 10:07 PM
Phil Manuel
 
Default LVM issue

Hi We use AoE disks for some of our systems. Currently, a 15.65Tb filesystem we have is full, I then extended the LVM by a further 4Tb but resize4fs could not handle a filesystem over 16Tb (CentOS 5.5). I then reduced the lvm by the same amount, and attempted to create a new LV, but get this error message in the process

lvcreate -v -ndata2 -L2T -t aoe
Test mode: Metadata will NOT be updated.
Setting logging type to disk
Finding volume group "aoe"
Test mode: Skipping archiving of volume group.
Creating logical volume data2
Test mode: Skipping volume group backup.
Found volume group "aoe"
Aborting. Failed to activate new LV to wipe the start of it.
Found volume group "aoe"
Unable to deactivate failed new LV. Manual intervention required.
Test mode: Wiping internal cache
Wiping internal VG cache


pvs
PV VG Fmt Attr PSize PFree
/dev/etherd/e2.0 aoe lvm2 a- 9.10T 7.10T
/dev/etherd/e2.4 aoe lvm2 a- 13.65T 0

vgs
VG #PV #LV #SN Attr VSize VFree
aoe 2 1 0 wz--n- 22.74T 7.10T

lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
data aoe -wi-ao 15.65T

I've run a vgscan but this didn't help. So any ideas what step I've missed to enable me to create the new LV ?

Thanks

Phil.
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Old 07-21-2010, 04:34 AM
Phil Manuel
 
Default LVM issue

OK I believe I've resolved it. I knew I was in test mode, but wasn't expecting those messages. Running the command out of test mode just works. Should have tried that earlier, never mind I'll know next time.

Phil.

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Old 07-21-2010, 09:08 AM
Peter Kjellstrom
 
Default LVM issue

On Wednesday 21 July 2010, Phil Manuel wrote:
> Hi We use AoE disks for some of our systems. Currently, a 15.65Tb
> filesystem we have is full, I then extended the LVM by a further 4Tb but
> resize4fs could not handle a filesystem over 16Tb (CentOS 5.5).

It's even worse, ext4 (with current userspace tools) can't handle >16T even if
you mkfs it from scratch...

/Peter
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