The max transmit unit on the QLA2464 is 2048 (Per QLA Boot BIOS ) and the max on the Emulex LP11002 is 2112 as reported by the above utility. (Hopefully it's correct, that software seems to be bit dated so not 100% sure of it's accuracy.)
I really haven't seen Jumbo Packets appear anywhere in any of the configs so thinking I'm safe on that side.
Along these lines, so far no one can comment if there is any incompatability between Emulex and QLogic. Would be curious to tap into those experiences to see if that could be the case.
Cheers,
DH
---------- Post updated at 11:44 PM ---------- Previous update was at 11:19 PM ----------
Here we go:
Wondering why it's saying 125 targets found when only one exists and only one port of the Emulex is plugged into the QLogic port with only one file assigned as a backing device.
Cheers,
DH
---------- Post updated 03-16-16 at 12:07 AM ---------- Previous update was 03-15-16 at 11:44 PM ----------
Out of curiosity, what is the hex value of a 'target reset' that is sent to the target? Having difficulty finding that.
At the time that the failure occurs, there is no response from the target. The software doesn't log anything so it's hard to tell where the issue is.
In my opinion it is very unlikely that the QL 2464 and Emulex have any compatibility issues unless either or both are running old firmware. They are both mainstream FC adapters and the FC standards are solid.
I would think your problem is due to the setup of the adapters BIOS wise so I would be checking all parameters for compatibility. As you explain, all is well until you put the adapters under pressure.
@hicksd8
IRT the Max Transfer Sizes, the Emulex has 2112 and the QLogic is set to 2048. It was suggested to match these up. I don't see a way to change this on AIX and I can only see some presets on the QLogic card. Is that difference in the Max Transfer Size significant?
@agent.kgb
Can you elaborate a bit more on your suggestion? I'm thinking you're referring to the scsi_id but want to be 100% sure. And I'm curious why it's reporting 125 targets.
Cheers,
DH
---------- Post updated at 12:56 AM ---------- Previous update was at 12:06 AM ----------
I should also add that the standard / traditional path listing just isn't there that comes from other SAN storage target devices. That's an oddity that I need to dig in too:
the first number 000002 is this ID. AIX requires, that all IDs count from 0 upwards. If you don't have ID 0, it can cause some strange errors.
What about your lsdev output, it's ok - you don't have ODM entries for your storage, that's why you see Other SCSI device. The usual way is to ask storage vendor for a fileset with such entries, but I am not sure, that Linux has something like this.
@hicksd8
IRT the Max Transfer Sizes, the Emulex has 2112 and the QLogic is set to 2048. It was suggested to match these up. I don't see a way to change this on AIX and I can only see some presets on the QLogic card. Is that difference in the Max Transfer Size significant?
Do you mean "2048" or is that a typo?
Standard packets are 2112 payload (ie, actual data) which becomes 2148 MTU (ie, packet size once header, footer, CRC, etc are added).
Therefore 2048 sounds wrong.
Does the QL board present you with a CTRL-Q option on boot to get inot its BIOS?
Is the anything similar on the LP11002?
I'm used to seeing a bank of settable options within the BIOS of FC cards although, as I said before, it's been a few years since. I seem to remember one of the options causing multiple duplicate LUN's to be seen in error.
@hicksd8
The QLogic card shows 2048 as the high end Max Transfer Size in the QLogic Boot menu (ctrl-q) you're saying it shouldn't? I'm not sure the LP11002 offers the same boot configuration menu. I could try to check but the ioinfo on Power5 doesn't work as it does on Power6/7.
@agent.kgb
This is interesting. I have it set to LUN 0 in the /etc/scst.conf file. There is no 2 but I wondered about this myself earlier since the SCST subsystem can't find 0x02 LUN and instead delivers it as LUN 0. I'll try to post the logs later tonight.
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