Hello,
We are at ADIC i2k with IBM drive.
ADIC support is adequite, cross platform support is problamatic, i.e 
talking to ADIC to listed to your problems about IBM drives.
Having said that, you need to have latest service pack with regard to your 
OS, W3K you will need SP1 to correct few SAN issues.
No subsitute for reading readme file that comes with the drivers.
At least in our enviroment with ADIC\BROCADE IBM we did need to turn off 
CDI this was really problamatic with Neworker 7.2.1.
As far as drivers, get atleat 6.3 which worked well for me in shared DDS, 
storage node inviroment, Zoning needs to be correct before you get to the 
drivers part.
IBM drivers get you best results when run from cmd promt, altough 
installing via device manger is also ok.
Lastly, its imposible getting IBM to support you if your lib is ADIC or 
else and ADIC ( probably true for other vendors too) will point the finger 
at IBM.

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