[linux-lvm] Insufficient suitable allocatable extents for logical volume

[linux-lvm] Insufficient suitable allocatable extents for logical volume

[Ron Johnson]

Why does this happen?  I think it has something to do with the fact that 
I set the lv to striped.

TIA,
Ron

# lvm version
   LVM version:     2.02.54(1) (2009-10-26)
   Library version: 1.02.39 (2009-10-26)
   Driver version:  4.17.0

(Yes, I know it's old.  Blame Ubuntu)

# vgdisplay data_vg
   --- Volume group ---
   VG Name               data_vg
   System ID
   Format                lvm2
   Metadata Areas        12
   Metadata Sequence No  6
   VG Access             read/write
   VG Status             resizable
   MAX LV                0
   Cur LV                1
   Open LV               0
   Max PV                0
   Cur PV                12
   Act PV                12
   VG Size               5.46 TiB
   PE Size               8.00 MiB
   Total PE              715392
   Alloc PE / Size       476928 / 3.64 TiB
   Free  PE / Size       238464 / 1.82 TiB
   VG UUID               NPgp1H-6kkG-c4wL-KNyT-AVoh-Frlb-4nvfiT


# lvextend -v -l+100%FREE data_vg/data_lv
     Finding volume group data_vg
   Using stripesize of last segment 8.00 MiB
     Archiving volume group "data_vg" metadata (seqno 6).
   Extending logical volume data_lv to 5.46 TiB
   Insufficient suitable allocatable extents for logical volume data_lv: 
238464 more required


# lvextend -v -l+50%FREE data_vg/data_lv
     Finding volume group data_vg
   Using stripesize of last segment 8.00 MiB
     Archiving volume group "data_vg" metadata (seqno 6).
   Extending logical volume data_lv to 4.55 TiB
   Insufficient suitable allocatable extents for logical volume data_lv: 
119232 more required

# lvextend -v -l+10%FREE data_vg/data_lv
     Finding volume group data_vg
   Using stripesize of last segment 8.00 MiB
   Rounding size (500774 extents) down to stripe boundary size for 
segment (500768 extents)
     Archiving volume group "data_vg" metadata (seqno 6).
   Extending logical volume data_lv to 3.82 TiB
   Insufficient suitable allocatable extents for logical volume data_lv: 
23840 more required

-- 
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the liberty and happiness of a people whose manners are universally
corrupt."
Samuel Adams, essay in The Public Advertiser, 1749

Re: [linux-lvm] Insufficient suitable allocatable extents for logical volume

[Paweł Brodacki]

2011/4/24 Ron Johnson <ron.l.johnson@cox.net>:
> Why does this happen?  I think it has something to do with the fact that I
> set the lv to striped.
>
> TIA,
> Ron

From Red Hat's LVM Administrator's Guide:
"Striped logical volumes can be extended by concatenating another set
of devices onto the end of
the first set. In order extend a striped logical volume, however,
there must be enough free space on
the underlying physical volumes that make up the volume group to
support the stripe. For example,
if you have a two-way stripe that uses up an entire volume group,
adding a single physical volume
to the volume group will not enable you to extend the stripe. Instead,
you must add at least two
physical volumes to the volume group."

So yes, the fact that you set the LV to stripped matters. Read the
manual http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/pdf/Logical_Volume_Manager_Administration/Red_Hat_Enterprise_Linux-6-Logical_Volume_Manager_Administration-en-US.pdf,
it contains a section on extending striped logical volumes.

Regards,
Paweł