we have an EVA 8000. we have added some extra disks to the shelfs. Is the best practice to add the disks to an existing Disk group or create a new one.
If i add the new disks to a disk group it will also start leveling. If if were to create a new disk group would the EVA still need to level the data or would it be fster to just create a new disk group?
1) You need at least 8 disks to create a new disk group 2) Two disk groups gives you more security but less space available and speed. 3) If you add disks to a existing group, there will be a leveling process, but it would not have a visible impact on performance, it's done with very low priority. 4) The data is redistributed among the disks on the disk group, but it's not altered, just moved from one disk to another.
thanks for the respone. would it be better to create new disk group? We have added 8 new disk. the existing DC is 24 disks but they are more or less all the same spec disks.
if you do have differennt size disks e.g 200gb FC, 250gb FC & you add 450gb disks to the Disk Group will this be ok? will any of the space be wasted? All disks are Fibre channel & same speed.
so if the disks were in the process of being added to the DG, the best thing to do would be to wait intil it has levelled & then ungroup each disk from the existing DG?
After this create a new disk group & add the 8 disks?
