From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerhard Schneider Subject: Re: SCSI tape access on 2.6 kernels? Date: Wed, 25 Jan 2006 20:03:41 +0100 Message-ID: <43D7CB8D.80300@ilsb.tuwien.ac.at> References: <43D604AD.6050607@ilsb.tuwien.ac.at> <43D69590.5050003@ilsb.tuwien.ac.at> <43D7A691.1040606@cococafe.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig79150904FD08F340A34BCD06" Return-path: Received: from gh-gw1.ilsb.tuwien.ac.at ([128.130.23.14]:12761 "EHLO gh-gw1.ilsb.tuwien.ac.at") by vger.kernel.org with ESMTP id S1750703AbWAYTDu (ORCPT ); Wed, 25 Jan 2006 14:03:50 -0500 Received: from [128.131.224.84] (v224-084.vpm.tuwien.ac.at [128.131.224.84]) by gh-gw1.ilsb.tuwien.ac.at (8.13.3/8.13.3/Debian-6) with ESMTP id k0PJ3jtW003922 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Wed, 25 Jan 2006 20:03:46 +0100 In-Reply-To: <43D7A691.1040606@cococafe.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig79150904FD08F340A34BCD06 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Denny Page schrieb: > I agree. In my case, the problem is also initial negation: 3 MB/s :-(.= >=20 > Denny >=20 Could be, as I wrote earlier I don't know how to check this on a Fusion or Megaraid chipset because all I have is /sys/class/scsi_tape/nst0/device/scsi_level=3D4 /queue_depth=3D7 /queue_type=3Dsimple The 53c8xx drivers are more verbose.. Actually I'm running a full backup (a few TB) on a generic 2.6.11.12 kernel with good performance (>30MB/s) on the LTO-3 tape library on a 53c1030 controller. That's first priority. After that backup I will play again with different kernel versions and the other tape library. Sorry for that delay.. GS --=20 Gerhard Schneider Institute of Lightweight Design and e-Mail: gs@ilsb.tuwien.ac.at Structural Biomechanics (E317) Tel.: +43 1 58801 31716 Vienna University of Technology / Austria Fax: +43 1 58801 31799 A-1040 Wien, Gusshausstrasse 27-29 http://www.ilsb.tuwien.ac.at/~gs/ --------------enig79150904FD08F340A34BCD06 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFD18uRE6e53f4wQG4RAhLFAJ4r8UsnhWDnpCvMtM63BVNk0vgBvQCfbS2p ULkBo0l/tlunkxZnIdc9ieA= =s7Yn -----END PGP SIGNATURE----- --------------enig79150904FD08F340A34BCD06--