We have IBM v3700 SAN system along with expansion unit as well. From past 2 weeks, there was loud noise generating from the SAN PSU like its running on full capacity. After some research it was found out that its a known bug in the v3700 series SAN and following actions should be taken to sort it.
- If you have IBM warranty/SLA, call the support, they will rectify the issue as IBM support is very good & quick in most cases. MAke sure you get the San Machine Type / Serial numbers before calling.
If you are managing the SAN on your own, then follow these instructions
(this doesnt requires any downtime, the process was non-destructive)
- The first thing to try is to ‘reseat the PSU cable’ of the PSU that is running high.
- If reseating the cable did not work, try reseating the PSU. After a few seconds, then fan speed should start to fall.
- Make sure you are running the latest firmware. I was running 7.1.0.5 (build 80.4.1309270000) that was very old (as of Sep,2017). A fix for this issue has been included from code level 7.6 onward. This fix works for V3700, V5000 and V7000 Gen2 so an upgrade will fix the problem. The new firmware is 7.8 as of current date.
- Finally the issue should be resolved by resetting the entire canister. Connect to the SAN controller using PUTTY, & issue following command [This point#3 solved my problem]
chenclosurecanister -reset -canister <can> <encl>
You need to find out which canister PSU is making noise. Example
chenclosurecanister -reset -canister 1 1
If you have additional canister, then you may use (wait half hour before applying command to 2nd canister)
chenclosurecanister -reset -canister 2 1
As showed in below image …
Wait for few minutes & the PSU sound should come back to normal.
