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hanging at startup after SAN work

After our SAN technicians replaced some equipment, a number of servers are hanging at startup.

But if I unplug the fiber connection and restart the server, everything starts up normally. If I plug the fiber in while the machine is on, the server will hang-up intermittently.

What direction do I need to point technicians to in order to get this resolved? e.g, configuration files, port speed etc.

exx1976

It would help to know the HBA and SAN manufacturer.. But, my first guess is that some change was made with LUN masking/zoning.. I'm guessing the server hangs at startup while it's scanning the FC loop, yes?

Marketing_Insists

ASKER

switch is a brocade 4900 and the SAN is a HP XP10000, HBA cards are Qlogic qla2300's.

The only servers having the problem are those that have more than one SAN connection; to the repaired switch and to a additional switch.

For example, Brocade B had a mainboard replaced on it. Any servers connected solely to Brocade B are fine. But if a server has connections to both Brocade B and Brocade A or Brocade B and Brocade C, we have these hangups

Marketing_Insists

ASKER

To rephrase, any server that is hooked up to Brocade-B (repaired) alone is fine. If a server is hooked up to Brocade-B PLUS any additional Brocade, these issues crop up.

ASKER CERTIFIED SOLUTION

exx1976

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