2013-06-25 08:24 AM
a little question on migrating from older disks/shelves to newer flash pools:
I think "root vol on Flash pool (hybrid) Aggregate" was allowed and supported since DOT 8.1.2, is that correct?
I am now on 8.1.3 7-mode (tried 8.1.2 also), but:
ucnlabfiler01*> aggr status
Aggr State Status Options
aggrflash online raid_dp, aggr hybrid_enabled=on
aggr0 online raid_dp, aggr root
I migrated all data volumes (vol move or manually) to the new Flash pool aggr. Fast and fine. But:
ucnlabfiler01*> vol options volroot_new root
vol options: Operation not permitted on a Flash Pool.
No way to get my root vol to the hybrid aggr without maintenance mode boot, i.e. downtime? Or no way at all??
Comments or hidden options welcome ;-)
2013-07-08 09:03 AM
It's definitely a supported function as I've installed quite a few in that mode. Normally I create the Aggregate and move root first, then enable the hybrid option, not the other way around. Do you have any other mutually exclusive options (such as SnapLock) on the root volume already?
Just tried it and a hybrid aggregate does indeed block the activation of the root flag on a volume.
If you need to do this you would need to move the root volume BEFORE setting the aggregate into hybrid mode (and ensure you are on 8.1.2+)
Create destination aggregate
Move root and restart
Confirm root is in the correct place
aggr options <aggr> hybrid_enabled on -f
aggr add <aggr> -t SSD <n>
Obviously this is a little late if you've already gone through most of the migration so it might be worth logging a call with NetApp support as it may be a bug (since 8.1.1 blocked shared root / hybrid completely and the command may not have been updated in the code)
Message was edited by: David McCarthy
2013-07-09 01:58 AM
Thanks for reply,
Yes I've also installed some new systems in that mode as well. So in 8.1 I indeed should have planned things in a different order. Already moved 50+ data volumes (8+ TB)... No fun to do that again (twice)...
However, meanwhile I was told of bug 621647 - according to that a "move of the root vol onto exisiting flash pool aggr" should work from 8.2 onwards... Can anyone confirm this?
I cannot give it a try (upgrade to 8.2) at the moment because of many SnapDrive/SnapManager dependencies...
2013-11-15 05:13 AM
On HA-Pair you can switch root volume without downtime even to a flashpool aggregat with cf takeover.
filerB> cf takeover
partnerfilerA> priv set diag
partnerfilerA> vol options <rootvol @ flashpool aggr> root -f
filerB> cf giveback
This has been tested on FAS2240 with Ontap 8.1.3P3.
2016-05-19 05:14 AM
I checked this with 8.2 but this is still not possible to move the rool volume to a flash-pool aggregate. With System Manager 3.2 as well, it is not possible to change the existing aggregate with the root volume to use disks from the SSD Pool.
There is a solution, to use Flash-Pool with a root volume and not loosing expensive hard disks for a new root aggregate.
Create a new aggregate, move the root volume on this aggregate, change to hybrid, add SSD disks.
As far as I know, this is only possible in this order using the commandline.
Good idea to take advantage of the increased max. aggregat sizes in Ontap 8.2 at the same time.
vol create vol0_new aggr1 250g
vol options vol0_new create_ucode on
vol options vol0_new convert_ucode on
vol options vol0_new no_atime_update on
vol lang vol0_new en_US
options ndmpd.enable on
ndmpcopy /vol/vol0 /vol/vol0_new
vol options vol0_new root
vol rename vol0 vol0_old
vol rename vol0_new vol0
vol offline vol0_old
aggr options aggr1 hybrid_enabled on –f
aggr options aggr1 cache_raid_group_size 10
aggr add aggr1 –T SSD 10