On Sat, 28 Nov 1998, Popov wrote:
...
> All DAT drives I know of are SCSI, so the block size issue is a SCSI thing,
> not a DAT or DDS one. If a drive claims to be SCSI X compliant, then it
> must support all sizes supported by SCSI sequential access devices, and
> there's pretty much no limit as to what the size can be.
>
The SCSI standard _allows_ a tape drive to support many block sizes but it
is not _required_. A drive may support only fixed block mode with one
block size. Examples of this kind of drives are the early QIC cartridge
drives. If a drive supports variable block mode, it must support fixed
block mode. The block size limits can be anything the drive manufacturer
chooses. There is a SCSI command to ask the drive what the limits are.
Kai
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