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Full Discussion: System V - ln /dev/mt00
Top Forums UNIX for Dummies Questions & Answers System V - ln /dev/mt00 Post 302575149 by ssid61 on Sunday 20th of November 2011 05:55:01 PM
Old 11-20-2011
Question System V - ln /dev/mt00

Hi,

I'm considering a test to see what would happen if I made a hard link (within /dev) to a tape drive (in this case a DAT).

The goal would be to capture data that would have normally been sent to tape into a local file (for use later).

The system is quite old (System V) in this test case.

Basically, I'm wondering if anyone has tried something similar (file mimicking a tape device for capture).

I'm brand new to "www.unix.com" but I've been working on UNIX systems of all kinds for quite some time. However, this unusual idea was put to me recently.

Thank you for any and all ideas and comments.
 

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TS(4)							     Kernel Interfaces Manual							     TS(4)

NAME
ts - TS-11 magtape interface SYNOPSIS
/sys/conf/SYSTEM: NTS ts_drives # TS11 /etc/dtab: #Name Unit# Addr Vector Br Handler(s) # Comments ts ? 172520 224 5 tsintr # ts11 driver major device number(s): raw: 8 block: 2 minor device encoding: bits 0003 specify TS drive bit 0004 specifies no-rewind operation bit 0010 ignored DESCRIPTION
The ts-11 combination provides a standard tape drive interface as described in mtio(4). The ts-11 operates only at 1600 bpi, and only one transport is possible per controller. FILES
/dev/MAKEDEV script to create special files /dev/MAKEDEV.local script to localize special files SEE ALSO
mt(1), tar(1), tp(1), mtio(4), ht(4), tm(4), dtab(5), autoconfig(8) DIAGNOSTICS
ts%d: no write ring. An attempt was made to write on the tape drive when no write ring was present; this message is written on the termi- nal of the user who tried to access the tape. ts%d: not online. An attempt was made to access the tape while it was offline; this message is written on the terminal of the user who tried to access the tape. ts%d: hard error bn%d xs0=%b xs1=%b xs2=%b xs3=%b. A hard error occurred on the tape at block bn; status registers 0-3 are printed in octal and symbolically decoded as bits. ts%d: addr mod 4 != 0. The address of a TS-11 command packet was not on an even longword boundary. BUGS
If any non-data error is encountered on non-raw tape, it refuses to do anything more until closed. The device lives at the same address as a tm-11 tm(4). 3rd Berkeley Distribution January 28, 1988 TS(4)
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