Date: Wed, 30 Jul 2014 08:03:31 +0200 From: Joerg Wunsch <freebsd-scsi@uriah.heep.sax.de> To: freebsd-scsi@freebsd.org Cc: "Kenneth D. Merry" <ken@FreeBSD.ORG> Subject: Re: Bacula fails on FreeBSD 10.x / "mt fsf" infinitely proceeds Message-ID: <20140730060330.GA3272@uriah.heep.sax.de> In-Reply-To: <20140730035230.GA81800@nargothrond.kdm.org> References: <20140729090724.GA26577@uriah.heep.sax.de> <201407291823.s6TINAad032318@higson.cam.lispworks.com> <20140729191829.GK3121@uriah.heep.sax.de> <20140729204354.GA78616@nargothrond.kdm.org> <20140729224414.E2AAE276@uriah.heep.sax.de> <20140730035230.GA81800@nargothrond.kdm.org>
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As Kenneth D. Merry wrote:
> Ahh. Now I know who to send sa(4) driver patches to test. :)
The only thing is that I don't love to reboot my main server machine
gratuitously. But everything I could do on old scratch hardware is
possible. I've also got a Tandberg SLR5 still around, I simply can't
throw it away ...
(Replacing the L9 by some SAS-attached LTO-x library is already
planned.)
> {black-pearl:/usr/home/kenm:!:0} dtrace -s tapetest.d
> dtrace: script 'tapetest.d' matched 1 probe
> CPU ID FUNCTION:NAME
> 0 401 saerror:entry Opcode 08, Status 0xc Data: Len 524290, Resid 2, Sense: Len 252, Resid 0
>
> 0 401 saerror:entry Opcode 08, Status 0xc Data: Len 524290, Resid 2, Sense: Len 252, Resid 0
Here's the DTrace output, first a dd with a blocksize of 64 KiB (on a
standard tar tape with 10 KiB records), then I did a rewind, followed
by "mt fsf 32767".
root@uriah:~ # dtrace -s /tmp/tapetest.d
dtrace: script '/tmp/tapetest.d' matched 1 probe
CPU ID FUNCTION:NAME
3 406 saerror:entry Opcode 08, Status 0xc Data: Len 65536, Resid 55296, Sense: Len 252, Resid 223
0 406 saerror:entry Opcode 11, Status 0xc Data: Len 0, Resid 0, Sense: Len 252, Resid 223
It seems we are getting no residual for the SPACE command?!
--
cheers, Joerg .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/
Never trust an operating system you don't have sources for. ;-)
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