Hi, I saw an article talking about the same errors you get. It calls for
updating your backup device driver and/or SCSI controller driver. To
download an updated driver, go to Veritas Support site\File and Updates
and
download BNTIDRV.EXE.

"Harish" wrote in message
news:388f4326@hronntp01....
>
> We run backup exec version 7.3 on nt4. I have been getting the

following
error
> for the past 4 days. Please help. The Drive Name is QUANTUM 0
>
> Performing Agent Accelerated backup
>
> An unknown error occurred on device "QUANTUM 0".
>
>
> An unknown error occurred on device "QUANTUM 0".
>
>
> Backup completed on 1/25/00 at 8:04:16 PM.
> Backed up 0 files in 0 directories.
> Processed 0 bytes in 5 seconds.
> Throughput rate: 0.000 MB/min