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From: ken@hpcupt3.cup.hp.com (Kenneth M. Sumrall)
Newsgroups: comp.sys.hp
Subject: Re: HP/UX and the 9144 cartridge tape drive
Message-ID: <48580032@hpcupt3.cup.hp.com>
Date: 22 May 91 21:22:44 GMT
References: <1991May21.180306.16925@netnews.whoi.edu>
Organization: Hewlett Packard, Cupertino
Lines: 28

>[Various problems with backing up a system to a 9144]
>
Using tcio is the only efficient way I know of to use a 9144 tape drive.
Tcio turns on the streaming mode of the device, and when invoked with the
correct parameters, streams continuously.  The backup script I use is uses
the following pipeline as its core:
 cd /; find . -hidden -fsonly hfs -print | cpio -ocxa | tcio -oV -S 8 /dev/rct

The V option to tcio uses hardware verify (which is MUCH faster) and the -S 8
uses a 8k buffer which causes the 9144 to continually be presented with
data so it streams continuously.

To get data off the tape, try
  cd /; tcio -i -S 8 /dev/rct | cpio -icdv <file_pattern>

Since the files are stored with relative path names, you must specify relative
path names to retrieve them, i.e., to retrieve the file "/etc/passwd", specify
"etc/passwd" on the command line.  Wildcards can be used, but they must
be escaped from the shell.

BTW, mt(1) is for 9 track tape drives only.

Hope this helps.

| Ken Sumrall                          |     Internet: ken%hpda@hplabs.hp.com |
| HP California Language Labs          |           UUCP:  ...!hplabs!hpda!ken |
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