Extending a stripped Logical Volume
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Quoted 1 line · Olmo Gonz�lez Alcojor
95388 PE of 4mb each is ~370 Gbyte, right? I may be missing something... I've tried to lvextend and get the same error, even when trying to extend just 1Gbyte.
You had 4 disks originally, and you striped across all of them, presumably with -i4. Now you added 2 disks, and you're trying to stripe 4 ways across them (because lvm2 defaults to the stripe size of the previous segment). This will fail because you don't have 4 disks to stripe across. To do this, you will need to specify '-i2' to your lvextend command. If the free space is split evenly across the 2 new disks, you should be able to fill the entire vg with 'lvextend -l95388 -i2 /dev/nasvg/naslv'
Quoted 94 lines
-----Mensaje original-----
De: AJ Lewis [mailto:[email protected]]
Enviado el: martes, 04 de enero de 2005 20:40
Para: LVM general discussion and development
Asunto: Re: [linux-lvm] Extending a stripped Logical VolumeQuoted 17 lines · Olmo Gonz�lez
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 requiredQuoted 3 lines
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.
You should be able to 'lvextend -L+1G
/dev/nasvg/naslv-i1' if you have and additional 1G of free space in the VG. However, based on the vgdisplay output below, it looks like you only have 3.72G free (or 95388 extents), so you'd want do do: 'lvextend -l+95388/dev/nasvg/naslv-i2' if you want to stripe it across the 2 new disks, or 'lvextend -l+95388/dev/nasvg/naslv-i1' if you want it to be a linear segment.Quoted 23 lines
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 ---
Quoted 13 lines
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 254:0Regards,
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AJ Lewis Voice: 612-638-0500 Red Hat Inc. E-Mail: [email protected] 720 Washington Ave. SE, Suite 200 Minneapolis, MN 55414 Current GPG fingerprint = D9F8 EDCE 4242 855F A03D 9B63 F50C 54A8 578C 8715 Grab the key at: http://people.redhat.com/alewis/gpg.html or one of the many keyservers out there...