Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bionet!ames!vsi1!wyse!mips!rogerk
From: rogerk@mips.COM (Roger B.A. Klorese)
Newsgroups: comp.sys.mips
Subject: Re: 8mm tape devices
Message-ID: <24076@abbott.mips.COM>
Date: 26 Jul 89 04:25:12 GMT
References: <2923@yunexus.UUCP>
Reply-To: rogerk@mips.COM (Roger B.A. Klorese)
Organization: MIPS Computer Systems, Sunnyvale, CA
Lines: 30

In article <2923@yunexus.UUCP> davecb@yunexus.UUCP (David Collier-Brown) writes:
>  I notice that while I have a normal dearth (man 7 mt (:-))
>of information on the /dev/mt devices, the new 8mm drives 
>are as yet undocumented.
>  So, we have in /dev/mt, the following:
>crw-rw-rw-  5 root      22,  64 Jul 20 16:13 hc0
>crw-rw-rw-  5 root      22,  64 Jul 20 16:13 hc0d4
>crw-rw-rw-  5 root      22,  65 Jul 20 15:57 hc0d4n
>crw-rw-rw-  5 root      22,  65 Jul 20 15:57 hc4
>
>  Note, please, that none of these have minor devices 0 (normal)
>or 4 (norewind).
>
>  I'll happily guess, but a hint from someone who knows wouldn't
>hurt.  I'll even donate a man page if someone can give me the
>real skinney on it, or tell me which FM to dive into.

I'm answering this from home, so I don't have the poop in front of me, but I
believe that so far the info is only in the 4.00 release notes.  As you
probably would have guessed, hc0/hc0d4 are rewinding, hc4/hc0d4n are
non-rewinding.

The minor numbers are what they are because major# 22 is the general SCSI
driver for the M/2000, and the device numbers correspond to a multiple of
the target ID.
-- 
ROGER B.A. KLORESE      MIPS Computer Systems, Inc.      phone: +1 408 720-2939
928 E. Arques Ave.  Sunnyvale, CA  94086                        rogerk@mips.COM
{ames,decwrl,pyramid}!mips!rogerk
"I want to live where it's always Saturday."  -- Guadalcanal Diary