Failure possibly caused by PVG-Strict allocation policy.

[panchadi sreekanth]

Hi i am getting below error,
Could some one please tell me what might be the problem? I Solved this problem in some othere fashon ( showing at the end of the mail) but i want to know why i am getting this error? I know this command should work, But why it is giving this error?

#lvextend -l 10 /dev/vg02/lvol14 /dev/dsk/c3t2d0 /dev/dsk/c3t7d0
lvextend: Not enough free physical extents available.
Logical volume "/dev/vg02/lvol14" could not be extended.
Failure possibly caused by PVG-Strict allocation policy.

Note: There are number of free PE's in both the disks c3t2d0 and mirror disk c3t7d0.

Solution in other way:-
----------------------
#lvsplit /dev/vg02/lvol14
#lvextend -l 10 /dev/vg02/lvol14 /dev/dsk/c3t2d0
#lvextend -l 10 /dev/vg02/lvol14b /dev/dsk/c3t7d0
#lvmerge /dev/vg02/lvol14b /dev/vg02/lvol14

Now
#pvdisplay -v /dev/vg02/lvol14
is showing 10 PE's in both the disks.

[RAC_1]

Post lvdisplay for that lvol.

How many disks are there in this vg?? Do all have enough free extents??

Anil

[Kent Ostby]

I've seen this once before where you can sometimes hit a bug that behaves like this.

A work around is to swap the order of the pvgs in the /etc/lvmpvg file.

Given that workaround is fairly simple, i don't think that there was ever a formal fix put in for it.

[panchadi sreekanth]

Hi Kont and RAC,
Thaks for the responce.
After some investigation i got the soultion for my problem.

I will explain it now:
below command
#lvextend -l 10 /dev/vg02/lvol14 /dev/dsk/c3t2d0 /dev/dsk/c3t7d0
Here the c3t7d0 disk is mirror to c3t2d0 but in lvmpvg c3t7d0 is not there, but an alternate link for this c3t7d0 is c4t7d0. This is there in it.
#cat lvmpvg
VG /dev/vg00
PVG rootscsi1
/dev/dsk/c1t6d0
PVG rootscsi2
/dev/dsk/c2t6d0
VG /dev/vg01
PVG omc1grp1
/dev/dsk/c3t0d0
/dev/dsk/c3t1d0
PVG omc1grp2
/dev/dsk/c4t5d0
/dev/dsk/c4t6d0
VG /dev/vg02
PVG omc2grp1
/dev/dsk/c3t2d0
/dev/dsk/c3t3d0
PVG omc2grp2
/dev/dsk/c4t7d0
/dev/dsk/c4t8d0

So now i change my actual commad to like this
#lvextend -l 10 /dev/vg02/lvol14 /dev/dsk/c3t2d0 /dev/dsk/c4t7d0
it is working.

Is this the proper way, what i did? Please let me know if ther is any erro in it.
Regards-- sreekanth

[Jdamian]

You should add the alternate links to the /etc/lvmpvg file.

The right order is

Primary link
Secondary link

in your box:

/dev/dsk/c3t7d0
/dev/dsk/c4t7d0

[panchadi sreekanth]

Hi benavent,
You are saying "you should add the alter nate links to the lvmpvg" , is it true? I don't think so.

I will explain with a part of my lvmpvg which is working in my m/c.
see Here: (part of lvmpvg )

VG /dev/vg02
PVG omc2grp1
/dev/dsk/c3t2d0--->its mirror is c3t7d0
/dev/dsk/c3t3d0---> it's mirror is c3t8d0
PVG omc2grp2
/dev/dsk/c4t7d0-->is alternate path to c3t7d0
/dev/dsk/c4t8d0-->is alternate path to c3t8d0

so if i want to use "lvextend -m ", i have to mention what ever the PV_Path i mentioned in lvmpvg file. Here c4t7d0 is mentioned insted of c3t7d0, so in my command i have to mention c4t7d0(which is alternate link to c3t7d0).
for this lvmpvg the command should be :
#lvextend -l 10 /dev/vg02/lvol14 /dev/dsk/c3t2d0 /dev/dsk/c4t7d0

if i change my lvmpvg like this

VG /dev/vg02
PVG omc2grp1
/dev/dsk/c3t2d0
/dev/dsk/c3t3d0
PVG omc2grp2
/dev/dsk/c3t7d0
/dev/dsk/c3t8d0

the command should be
#lvextend -l 10 /dev/vg02/lvol14 /dev/dsk/c3t2d0 /dev/dsk/c3t7d0
(both commands are working now , with this change)

So what my understand is,
for a mirror disk we can put praimary/secondary , depends on this we have to change the command.
I don't think we should add alter nate link?

What is your commant...........?