I have a remote system that needs to resume on startup. If the system is simply powered on then the blades boot before the SAN is online and then the only thing you can do is restart the systems.
Is it possible to restart the fibre channel controller? That way I could have a system restart the controller after boot, connect to the SAN and then restart all servers requiring SAN information?
Please note that I'm not a sys admin, just shooting for ideas to get a clean startup to work, apologies if my terminology is wrong.
I'm a HP blade guy myself but they have individual blade boot delay options, perhaps the IBM ones have the same function?
When you say 'restart the FC controller', yes you can do so. Have the controller issue a LIP and rescan for LUNs on the FC fabric. How to do so depends on the OS.
I also wrote some other suggestions in your other question:
You can't directly control the powerup sequence of the blades in a BladeCenter, but you can control the amount of time each takes to boot.
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Another option would be to control blade powerup via some kind of external script. Have an external system that upon startup, starts the blades in the appropriate order via telnet/SNMP/whatever.