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iSCSI Guru's quick question

V

Vader

Supreme [H]ardness
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To make a rather long and painful story short, this is the dilema I face. We purchased serveral HP Dl380G7s that included dual Qlogic 10Gbe adapters. These handle the iSCSI traffic to our HP 10Gbe Switches and to our HP P4000 SAN.

We have had several failures of these cards, i'm talking 18 out of 66 cards go bad since I stood up the systems last December. HP is going to take the cards back and issue us a refund. In the meantime, we have ordered some Intel adapters.

Now, I have several servers and several volumes. I'm trying to avoid getting handcramps and disconnecting all the volumes on the servers and having to reconnect and setting up MPIO..which is very tedious. My thought is I have to update the latest SAN I/Q software for our SAN and part of that requires the SAN to reboot. I was thinking I could shutdown the SAN, uninstall qlogic crap hardware and software install the intel's update firmware and drivers and configure same IP's..etc, reboot the SAN, finish the SAN i/q update, then power on the servers.

I know, I know, it's lazy, yes..but I have a limited maitenance window, and if you've ever manually added 100's of volumes w/MPIO setup using the MS iSCSI initiator, you should feel my pain..lol.

Any input would be great here..or any other better ideas?

Thanks!
 
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I feel your pain! We use ISCSI targets with Qlogic ISCSI adapters for our VMware clusters, multi path and all. We also have some Microsoft clusters using MS ISCSI init.

In my best experience it is always best to do it clean. Yes, you get the hand cramp but you know it works and you can sleep at night. I never attempt to do it the quick way , something always goes wrong.

Personally, I would not do all three changes at once. Never update the software on your SAN and update the firmware on all of your controllers. If something dies, you will have problems finding the issue. I cannot count the number of times that a software or firmware update appeared to work fine after a reboot but a day or two later we find a little bug that reduces performance to 50%. Worst case, the new SAN software does not support the new firmware on the ISCSI adapter. It can load and connect just fine but now all transactions take 50% longer.

Also remember to backup your data before a SAN software update!
 
Yeah....I know...I know....I had a feeling I knew the answer already...damn you iSCSI manual target setup..I hate you!..lol
 
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