I would like to connect a external "easyRaid system" to an IBM p-
server (9114-275)
running with AIX 5.3 attached with an "PCI-X Dual channel ULTRA320
SCSI Adaper".
As soon as the RAID-tower is powered on, I got the system error

"2522-723 Device bus interface problem."

The latest microcode version for this adapter is active.

There is no problem per example to use a external tape-drive at this
The "easyRaid system" can be used without any problem , connected to
an older
IBM RS6000 system working with AIX 4.3.

Any idea what to do, to solve this problem ???
Thank you in advance for your help .