Date: Fri, 22 Dec 2006 16:30:31 GMT From: mjacob@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: Re: bin/106973: 'tar' cannot read own tape, but 'pax' can Message-ID: <200612221630.kBMGUVYR036710@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR bin/106973; it has been noted by GNATS.
From: mjacob@freebsd.org
To: Bernd Luevelsmeyer <bdluevel@heitec.net>
Cc: mjacob@freebsd.org, FreeBSD-gnats-submit@freebsd.org,
freebsd-bugs@freebsd.org
Subject: Re: bin/106973: 'tar' cannot read own tape, but 'pax' can
Date: Fri, 22 Dec 2006 08:24:37 -0800 (PST)
I would expect a Travan based drive to be like a QIC tape. From my
minimal experience with them, they seem to be derived from QIC standards
and probably derive from native QIC-02 starting back 20 odd years ago
(like the old Cipher Floppy-Tape drive which had an SA850 interface).
I dunno why tar didn't give a 0 exit on the create, but try again
replacing the || with ;
The point here is to try and force 512 and 1024 byte record creation and
to force 512 and 1024 byte reads.
>
> Sure. I would have expected the eotmodel to be 2, but it appears to have
> been 1 to begin with. In order to keep the mail to a sensible length, I
> deleted most of tar's output and replaced it with "[...]". However, I
> don't quite understand the point of this test, since the "tar c" _does_
> work fine; it's the reading that doesn't work.
>
> Script started on Fri Dec 22 10:37:13 2006
> #mt -f /dev/sa0 seteotmodel 1
> /dev/sa0: old model was 1 filemark at EOT
> /dev/sa0: new model is 1 filemark at EOT
> #cd /usr/include
> #tar cvfb /dev/sa0 1 . || tar tvfb /dev/sa0 1
> a .
> a a.out.h
> a ar.h
> a assert.h
> a bitstring.h
> [...1571 lines...]
> a bsm/audit.h
> a bsm/audit_kevents.h
> a bsm/audit_internal.h
> a bsm/audit_record.h
> a bsm/audit_uevents.h
> a bsm/libbsm.h
> #mt -f /dev/sa0 rewind
> #tar cvfb /dev/sa0 2 . || tar tvfb /dev/sa0 2
> a .
> a a.out.h
> a ar.h
> a assert.h
> a bitstring.h
> [...1571 lines...]
> a bsm/audit.h
> a bsm/audit_kevents.h
> a bsm/audit_internal.h
> a bsm/audit_record.h
> a bsm/audit_uevents.h
> a bsm/libbsm.h
> #exit
>
> Script done on Fri Dec 22 10:44:49 2006
>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200612221630.kBMGUVYR036710>