Hi is there a easy way to see in Unisphere how the pool was "setup"
for example i want to expand a pool with the same internal Raidgroup config like before but i'm unsure if the pool was setup like
R5 ( 4+1 ) with 3 disks ,4 disks ,5(Recommended) disks ....7 8 9 disks.
Can i deterime it in any way through Unisphere GUI ( without Report Wizard )
Highlight the Pool and click EXPAND.
The current disk grouping will be displayed in the RAID Configuration drop down box.
Hi Sebastian, Interesting, perhaps it only displays recommended counts, if you have used them.
Personally, I would grab the info from naviseccli; Do you have access to it ?
naviseccli -h arrayspa -storagepool -list -id # -all | select-string -pattern "RAID Type" -context 1,2
(from a powershell session).
From that you'll get the RAID Type and drive count for each tier.
Also, please consider using RAID 6 for NL-SAS drives, the rebuild times are very long.
See attached for all the recommendations.
From what I see yo actually configure a RAID5 wint 3 disks (2+1) this is not the best practice. As Brett@s tall you should make NL-SAS drives as RAID6:
NL-SAS for Classic RAID6: 4+2 or 8+2
NL-SAS for Pool RAID6: 6+2 or 14+2
When you correctly configure your pool, you should also expand in multliples of the base RAID.
If you create the pool as 6+2, you should add in multiples of 8 disks.
Hi Alvaro, this is only a "TEST Pool" to demonstate that the expand of disks is not equal to the current layout.
I know the BP for VNX ... but as you wrote " you should expand in mutiples of the base RAID" sometimes you need to determine whats the base RAID and expand even if its not BP
Because im OCD, I add to the pool in only the RAID Group Modulus. So for example, a 4+1 R5, ill add 5 disks so I know where the failure domain exists. This is pertinent when doing vertical binding as I only want a single disk per shelf. My .02