Tape Server can't locate the device

[Ayman Altounji]

I replaced a 15/30-GB DDT Drive by a 20/40-GB DDT Drive and updated the ArcServIT6.6 with the SP4. Now, when starting up the tape server, I get an error message that there is no Tape Device found, what seems to me rather strange, because after the tape server log file, it first recognizes the right device. I added the important part of the Log file at the end of the message.
Any idea what could be wrong?

many thanks

TAPE$SVR.log
----------------

Dec 19 19:46:27 Loading TAPESVR.NLM, Computer Associates release...
Dec 19 19:46:28 Scanning Board 0, GDTRP103 , Board Name = BOARD0
Dec 19 19:46:28 SCSIID 00: < No Device Present >
Dec 19 19:46:28 SCSIID 01: < No Device Present >
Dec 19 19:46:28 SCSIID 02: < No Device Present >
Dec 19 19:46:28 SCSIID 03: < No Device Present >
Dec 19 19:46:28 SCSIID 04: < No Device Present >
Dec 19 19:46:28 SCSIID 05: COMPAQ 20/40GB DDT DRY D887 (Tape Drive)
Dec 19 19:46:28 Tape list: COMPAQ 20/40GB DDT
Dec 19 19:46:33 E7027 Failed to locate any tape drives on Board [BOARD0]
Dec 19 19:46:33 E7028 Group [ARC SERVE] failed to initialize properly and will not be created.
Dec 19 19:46:33 STANDARD.NLM is loaded
Dec 19 19:46:33
Dec 19 19:46:33 E6916: No backup device was found by Tape Server
Dec 19 19:46:34
Dec 19 19:46:34 TAPESVR.NLM has been loaded successfully

[Ayman Altounji]

Update the System ROM on the Server you're using . Also update the SCSI device drivers from the latest NSSD .