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[linux-lvm] Extending a stripped Logical Volume



Hi,

I am new to this list, seeking for some help.

I have setup LVM2 under debian sarge (2.6.8-k7 kernel).

I originally created a volumen group (nasvg) on 4 x ST3200822A ATA DISK drives. I created a stripped logical volume spanning these 4 disks and using up al PE's available. I then attached two aditional ST3200822A ATA DISK drives and I would now want to resive my logical volumen to use al the PE's provided by the two new disks. The problem is I can't extend the logical volume, getting the following error:

gollum:~# lvextend -L+1G /dev/nasvg/naslv
Using stripesize of last segment 64KB
Extending logical volume naslv to 746.23 GB
Insufficient allocatable extents suitable for parallel use for logical volume naslv: 191036 required


I have been googl'ing and it seems that this has to do with restrictions on resizing sttriped LV's. However, the information I have found says the restrictions no longer apply to LVM2.

Any help would be appreciated. I'm thinking of creating a linear lv spanning al 6 disks but this would mean backing up ~600gb of data which could be a pain...

Here is my output for both vgdisplay and lvdisplay.


gollum:~# vgdisplay --- Volume group --- VG Name nasvg System ID Format lvm2 Metadata Areas 6 Metadata Sequence No 25 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 6 Act PV 6 VG Size 1.09 TB PE Size 4.00 MB Total PE 286168 Alloc PE / Size 190780 / 745.23 GB Free PE / Size 95388 / 372.61 GB VG UUID LWqtTF-F8vA-yjXt-AYwK-yFQr-skDa-s9UVRC

 --- Logical volume ---
 LV Name                /dev/nasvg/naslv
 VG Name                nasvg
 LV UUID                GMm5PD-6Rdk-h8lG-35Fw-rZp3-L42s-N6k9QC
 LV Write Access        read/write
 LV Status              available
 # open                 1
 LV Size                745.23 GB
 Current LE             190780
 Segments               1
 Allocation             inherit
 Read ahead sectors     0
 Block device           254:0

Thanks, and merry Christmas!
Olmo.



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