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- From: olson@anchor.esd.sgi.com (Dave Olson)
- Newsgroups: comp.sys.sgi
- Subject: Re: DAT SCSI COMMANDS ON SGI INDIGO
- Message-ID: <sobjssg@zuni.esd.sgi.com>
- Date: 24 Nov 92 02:42:00 GMT
- References: <By6KM8.ErA@ra.nrl.navy.mil>
- Sender: news@zuni.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc. Mountain View, CA
- Lines: 31
-
- In <By6KM8.ErA@ra.nrl.navy.mil> MACRVM.NRL.NAVY.MIL (JEFF JAMES) writes:
- | I have an SGI Iris Indigo Elan with a DAT drive installed and would like
- | to operate the drive with raw SCSI commands. I can write to the drive and
- | rewind the tape as well as read using the SCSI commands in dslib.h but there
- | are several commands missing that control the tape such as functions for
- | writing file marks, seeking data on the tape and writing EOT's. Any info on
- | this subject would be greatly appreciated.
- |
- | PS Any info on general DAT storage formats would be appreciated.
-
- I assume you are the same person who contacted TAC today on this, since
- the questions are so similar. It would be helpful to say that you
- are doing that...
-
- Use 0x2b (locate) to seek, and 0x10 (write filemark) to write the
- filemarks. As Jeremy said, the source to libds.a is in the same
- directory as the inquiry.c sample (dslib.c). You are expected to write
- new routines (about 5-15 lines) for new functions that aren't
- already there. This is pretty trivial, given the manual for
- the device you are using.
-
- You can probably get the manual for your DAT drive from Ardat, or via
- an Ardat dealer (Maynard is their retail/distribution arm). For what
- it is worth, in SCSI 2 mode (the mode we ship it jumpered in), the
- drive is very close to the SCSI 2 draft standards, so you can probably
- use the SCSI 2 spec or any other SCSI 2 compliant tape drive manual,
- and be very close. The drive is a variant of the Ardat 4320.
- --
- Let no one tell me that silence gives consent, | Dave Olson
- because whoever is silent dissents. | Silicon Graphics, Inc.
- Maria Isabel Barreno | olson@sgi.com
-