Not very sure, but there may be a bug still around when a shelf is replaced on a head.if you remove a shelf and replace it with another but with a different serial number you may have an issue that only a reboot will fix.
On Jun 1, 2010 6:19 PM, "Steve Losen" scl@sasha.acc.virginia.edu wrote:
Hello toasters,
We need to replace a disk shelf on a FAS3050 clustered pair and I was wondering if I could shut down just the filer that owns the shelf and leave the partner up, even though the partner is connected to the shelf.
We had a fan fault on a PSU, replaced it, and later on the fan fault came back. Replaced it again and the same thing happened, so now we must replace the shelf. It is in the middle of a shelf chain and I must disconnect it and physically remove it from the cabinet.
On the FAS3050 disk ownership is hardware assigned. Filer "A" owns all of the shelves and disks on its 0a FC adapter and the bad shelf is on this chain. The partner filer "B" is also connected to these shelves using its 0b FC adapter and the ESH2 "B" modules on the shelves.
I am wondering if I can leave filer "B" up. I was thinking along these lines:
cf disable
shut down filer "A"
power off bad shelf, disconnect, and remove
install replacement shelf, move disks, PSUs and ESH2 modules from old shelf to replacement shelf.
set shelf id
connect and power on
wait for shelf to boot and disks to spin up
boot filer "A"
cf enable
I am sure that filer "B" will be unhappy because its 0b loop will be broken, but I hope it will stay up because all of the disks that B owns will remain available. Only partner disks owned by "A" will disappear.
Will filer "B" return to normal when its 0b loop is reconnected?
We are running ONTAP 7.3.1.1
I know it is safer to shut down both filers, but the resulting downtime would be more than twice as disruptive.
Steve Losen scl@virginia.edu phone: 434-924-0640
University of Virginia ITC Unix Support