From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Edgar Subject: slow external firewire drive Date: Thu, 27 Oct 2005 01:56:55 +0000 Message-ID: <20051027015655.GC14010@toucan.gentoo.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="GPJrCs/72TxItFYR" Return-path: Received: from smtp.gentoo.org ([134.68.220.30]:54252 "EHLO smtp.gentoo.org") by vger.kernel.org with ESMTP id S932626AbVJ0B44 (ORCPT ); Wed, 26 Oct 2005 21:56:56 -0400 Received: from rocket by smtp.gentoo.org with local (Exim 4.43) id 1EUx0h-00000a-V2 for linux-scsi@vger.kernel.org; Thu, 27 Oct 2005 01:56:55 +0000 Content-Disposition: inline Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org --GPJrCs/72TxItFYR Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi, I am having trouble with an external firewire drive. I have a texas instruments based card and a maxtor external enclosure. Whenever I try to do anything with this disk the iowait goes through the roof and it can take half an hour or more to untar an 80mb file. I am not sure if its something with my computer or the card or the enclosure. Any help would be greatly appreciated. hci1394: $Rev: 1313 $ Ben Collins PCI: Enabling device 0000:00:0c.0 (0014 -> 0016) PCI: Found IRQ 11 for device 0000:00:0c.0 ohci1394: fw-host0: OHCI-1394 1.0 (PCI): IRQ=3D[11] MMIO=3D[d9800000-d9800= 7ff] Max Packet=3D[2048] sbp2: $Rev: 1306 $ Ben Collins ieee1394: sbp2: Driver forced to serialize I/O (serialize_io=3D1) ieee1394: sbp2: Try serialize_io=3D0 for better performance ieee1394: sbp2: Logged into SBP-2 device ieee1394: Node 0-00:1023: Max speed [S400] - Max payload [2048] Vendor: Maxtor Model: 1394 storage Rev: v1.3 Type: Direct-Access-RBC ANSI SCSI revision: 04 SCSI device sda: 156355584 512-byte hdwr sectors (80054 MB) sda: asking for cache data failed sda: assuming drive cache: write through SCSI device sda: 156355584 512-byte hdwr sectors (80054 MB) sda: asking for cache data failed sda: assuming drive cache: write through sda: sda1 Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0, type 14 hdparm -tT /dev/sda /dev/sda: Timing cached reads: 644 MB in 2.01 seconds =3D 320.40 MB/sec Timing buffered disk reads: 8 MB in 3.09 seconds =3D 2.59 MB/sec uname -a=20 2.6.14-rc4 =20 I dont seem to see any error messages ... just bad performance. Thanks in advance, Eric --GPJrCs/72TxItFYR Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFDYDPnG1H288hHbuMRAoBTAKC2nPgfHEVl7tN3MqoQX7c9d3HHcQCdHYeF AFTeAgIOp6pgfAa4CZmZ58E= =tq1u -----END PGP SIGNATURE----- --GPJrCs/72TxItFYR--