Fibre Channel (SAN)

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Posts: 1
Registered: ‎08-19-2004

firmware update SWITCH PID format causes all hosts loos storage

Has any one run it this problem before.

Frequent Contributor
Posts: 78
Registered: ‎12-23-2005

Re: firmware update SWITCH PID format causes all hosts loos storage

yes, this is a known problem. Especially with HP-UX and AIX hosts.bernd

Frequent Contributor
Posts: 89
Registered: ‎05-12-2004

Re: firmware update SWITCH PID format causes all hosts loos storage

Well from the sounds of the original post you had a segmented fabric due to the different PID settings. All switches in a fabric have to use the same PID format or fabric segmentation will occur. The persistant bing issue that Bernd points out does come up when people change fabrics to core PID for the reasons pointed out, but since you were able to just change the setting on the old switches to 1 (core PID) and then you could access your storage points to me that when you first ISL'ed everything together you never created a fabric since the two new switches would not have been able to join the two old switches due to the PID difference. This is actually very common since the new switches come with core PID format by default and older firmwares did not have core PID turned on. To answer another one of your questions, core PID is not required for trunking, but as pointed out by Bernd if you ever want to use a switch larger than 16 ports it is required. So basically with a little bit of pain you have saved yourself some grief in a future upgrade.

Contributor
Posts: 69
Registered: ‎09-16-2003

Re: firmware update SWITCH PID format causes all hosts loos storage

I had the same issue with Silkworm 2800 when passing the PID to 1.=> re-enable the zoning settings (cfgsave + cfgenable) => OK.

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