[5233] in linux-scsi channel archive
Re: Linux 4mm SCSI DAT Drive Settings
daemon@ATHENA.MIT.EDU (Kai Makisara)
Sun Nov 29 16:37:00 1998
Date: Sun, 29 Nov 1998 22:33:53 +0200 (EET)
From: Kai Makisara <makisara@metla.fi>
Reply-To: Kai.Makisara@metla.fi
To: Popov <popov@ix.netcom.com>
cc: Jon Lewis <jlewis@inorganic5.fdt.net>,
Martin Gallant <martyg@wired.ml.org>, amanda-users@amanda.org,
linux-scsi@vger.rutgers.edu
In-Reply-To: <3660F58D.9F50D758@ix.netcom.com>
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
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
