Radeon wrote:
MammaGutt wrote:
Radeon wrote:
Thank you MammaGutt.
Then the question is, is it possible to change the cpg set size ratio on the current array? Will this action lead to irreversible consequences?
The quick and dirty is to change the set size on the CPG and run tunesys.
The other way is to create a new CPG and tune each volume.
For the last one you need at least the size of the largest volume in free space. For the first one you could manage with less but always good to have 15-20% free capacity.
Are you saying to have 15-20% headroom and not actually use 4 disks? But isn't it more efficient to use the entire volume of the group?
MammaGutt, is it possible to lose data when changing cpg set size?
and do you think it would be better for me to switch to cpg set size 8 + 2 or stay at 6 + 2
The 3PAR will use all disks. They har divided into chunklets. So with set size 8, it goes "something" like this
LD1 disk 1,2,3,4,5,6,7,8
LD2 disk 9,10,11,12,13,14,15,16
LD3 disk 17,18,19,20,1,2,3,4
LD4 disk 5,6,7,8,9,10,11,12
Not possible to lose data.
It will give you a little more effective space.