OK,  our issue has finally been identified and resolved with the help of our first level Symantec Netbackup support vendor.  This is how is was desribed to me:  The other issue that may be causing it is that the LTO 5 drives now support Append-Only Mode from [URL]   SCSI Stream Commands (SSC-4) has introduced a new data protection feature for tape drives called "Append Only Mode".   This feature causes the drive to prevent the overwrite of data on a cartridge unless the writing application performs a pre-authorization for the overwrite. Pre-authorization for overwrite is a done with a new SCSI command (Allow Overwrite) that informs the drive that the data block at the current location is going to be overwritten. Any attempt to overwrite a data block without pre-authorization returns a write protect error. IBM LTO-5 drives support this feature (even with LTO-4 media). Once set, LTO-5 drives remain in append mode until power cycled.”  ---  So apparently the Celerra isn't sending the proper commands to Pre-Authorize the write?  Hince the write-protect error even when the tape isn't physically write protected.  The work around was to drop the following file into our Netbackup config:  \Netbackup\db\config\DISABLE_APPEND_MODE  This causes Netbackup to disable the Append Only Mode.  And now Celerra can write directly to the LTO5 drives via NDMP over the storage network.  Regards, David-
Trying to perform NDMP backups to a fiber connected IBM ULTRIUM-TD5 drive without much sucess.  The Celerra sees the drive and library and netbackup can sucessfully communicate to the Celerra.  However running a backup job generates the following error:   2011-09-07 19:45:53: DRIVERS: 6: FCDMTL 2 [9.0.2] Status buffer overrun: xid 19d, msg 60390a0, address id 6208132011-09-07 19:45:54: DRIVERS: 6: FCDMTL 2 [9.0.2] Status buffer overrun: xid 1b9, msg 60397c0, address id 6208132011-09-07 19:45:54: CAM: 3: I/O Error: c96t0l0: CamStatus 0x84 ScsiStatus 0x02 Sense 0x07/0x5a/0x022011-09-07 19:45:54: CAM: 3: camFlags 0x81 Addr 0x26db6000 Len 0x400 Resid 0x02011-09-07 19:45:54: CAM: 3: cdb: 0a 00 00 04 00 00 00 00 00 00 00 00   | SCSI ERR ON #9600    camstat 0x84  bstat InvalidOperation   | scsi stat.skey.ascq 0x02.07.5a02  Check condition   |                     skey  [   ]   Write protect   |____________________ ascq          Operator selected write protect2011-09-07 19:45:54: NDMP: 3: Thread ndmp013 DartTapeInterface: write error2011-09-07 19:45:59: CAM: 3: I/O Error: c96t0l0: CamStatus 0x84 ScsiStatus 0x02 Sense 0x07/0x5a/0x022011-09-07 19:45:59: CAM: 3: camFlags 0xc1 Addr 0xffffffff Len 0x0 Resid 0x02011-09-07 19:45:59: CAM: 3: cdb: 10 00 00 00 01 00 00 00 00 00 00 00   | SCSI ERR ON #9600    camstat 0x84  bstat InvalidOperation   | scsi stat.skey.ascq 0x02.07.5a02  Check condition   |                     skey  [   ]   Write protect   |____________________ ascq          Operator selected write protect  Basically from the netbackup side you see the tape mount and it looks like the job is about to write data but then fails immediately.   Any suggestions?  Thanks, David-
NDMP backups to IBM ULTRIUM-TD5 drive