How to extend a LV with Allocation "PVG-strict/distributed"

[P Arumugavel]

Gurus,

I have to extend a lvol which has the allocation policy "PVG-strict/distributed". The VG has two PVGs and each PVG has 4 disks. The LV which needs extend, is sitting on PVG1, and none of the disks in this PVG has free PE's. But the disks in PVG2 has free PE's.

I have two questions:

1. In this scenario, Can I extend the LV without breaking the allocation policy?

2.  If not, should I add equal number of disks to PVG1 and then extend? - But I got only one disk with larger size.

Can you please advise if any possiblities to extend this LV and how

Thanks...

Vel

[Torsten.]

PVG-strict is used for mirroring.

>>none of the disks in this PVG has free PE's. But the disks in PVG2 has free PE's.

Does this means at least some LVOLs are not mirrored?

[P Arumugavel]

Hello Torsten,

I dont understand why these lvols are PVG-strict, but not mirroed...

No lvols are mirrored...

Thanks,
Vel

[Torsten.]

What is used as "disk" - a SAN array or real disks?

Could you provide an

# ioscan -fn

and

# vgdisplay -v ...

# lvdisplay -v ...

for the VG/LVOL in question?

[P Arumugavel]

Please find the details...

Thanks,

Vel

[arunaphcl]

You can just remove PVG strict for the partilar LV and extent it.

lvchange -D n -s y  lv name