[3919] in linux-scsi channel archive
Re: IO rate only 10 MB/sec?
daemon@ATHENA.MIT.EDU (Larry M. Augustin)
Thu May 14 00:53:35 1998
Date: Wed, 13 May 1998 19:08:54 -0700
From: "Larry M. Augustin" <lma@varesearch.com>
To: linux-scsi@vger.rutgers.edu, pryke@aupc1.uchicago.edu
I have not looked at the specs for a Seagate 23 GB ST423451W, but
10 MB/sec would not be unusual.
Larry
>From: Clem Pryke <pryke@aupc1.uchicago.edu>
>X-Orcpt: rfc822;linux-scsi@vger.rutgers.edu
>Sender: owner-linux-scsi@vger.rutgers.edu
>Precedence: bulk
>X-Loop: majordomo@vger.rutgers.edu
>Status: RO
>
>Hi all,
>
>I have a Dell GXPro running RedHat 5. It contains two
>Adaptec AHA-2940 Ultra SCSI boards. One of these is connected
>to a Seagate 23 GB ST423451W disk as the only device on the
>bus. When I do "/sbin/hdparm -Tt /dev/sdb1" I see:
>
>/dev/sdb1:
> Timing buffer-cache reads: 32 MB in 0.68 seconds =47.06 MB/sec
> Timing buffered disk reads: 16 MB in 1.48 seconds =10.81 MB/sec
>
>Is 10 MB/sec the most I can expect from fast/wide SCSI, or
>should I get more? (I could really use more bandwidth). dmseg
>excerpt follows:
>
>Thanks for any help,
>
>Clem Pryke
>
>
>aic7xxx: <Adaptec AHA-294X Ultra SCSI host adapter> at PCI 9
>aic7xxx: Warning - detected auto-termination. Please verify driver
> detected settings and use manual termination if necessary.
>aic7xxx: BIOS enabled, IO Port 0xe800, IO Mem 0xfcfff000, IRQ 11, Revision B
>aic7xxx: Wide Channel, SCSI ID 7, 16/16 SCBs, QFull 16, QMask 0x1f
>aic7xxx: <Adaptec AHA-294X Ultra SCSI host adapter> at PCI 10
>aic7xxx: Warning - detected auto-termination. Please verify driver
> detected settings and use manual termination if necessary.
>aic7xxx: BIOS enabled, IO Port 0xe400, IO Mem 0xfcffe000, IRQ 10, Revision B
>aic7xxx: Wide Channel, SCSI ID 7, 16/16 SCBs, QFull 16, QMask 0x1f
>scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 4.1/3.2
>scsi1 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 4.1/3.2
>scsi : 2 hosts.
>scsi0: Scanning channel A for devices.
> Vendor: WDIGTL Model: WDE4360-1807A3 Rev: 1.80
> Type: Direct-Access ANSI SCSI revision: 02
>Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
>scsi0: Target 5, channel A, refusing WIDE negotiation; using 8 bit transfers.
> Vendor: NEC Model: CD-ROM DRIVE:464 Rev: 1.04
> Type: CD-ROM ANSI SCSI revision: 02
>Detected scsi CD-ROM sr0 at scsi0, channel 0, id 5, lun 0
>scsi0: Target 6, channel A, refusing WIDE negotiation; using 8 bit transfers.
> Vendor: ARCHIVE Model: Python 00095-001 Rev: 5.ac
> Type: Sequential-Access ANSI SCSI revision: 02
>Detected scsi tape st0 at scsi0, channel 0, id 6, lun 0
>scsi1: Scanning channel A for devices.
> Vendor: SEAGATE Model: ST423451W Rev: 0013
> Type: Direct-Access ANSI SCSI revision: 02
>Detected scsi disk sdb at scsi1, channel 0, id 1, lun 0
>scsi : detected 1 SCSI tape 1 SCSI cdrom 2 SCSI disks total.
>SCSI device sda: hdwr sector= 512 bytes. Sectors= 8388314 [4095 MB] [4.1 GB]
>SCSI device sdb: hdwr sector= 512 bytes. Sectors= 45322644 [22130 MB] [22.1 GB]
>
>
>--
>**********************************************************************
>Clem Pryke
>University of Chicago,
>Room 226, LASR, 933 East 56th Street, Chicago, Illinois 60637, USA
>
>Tel: 773 702-7853 Fax: 773 702-6645 email: pryke@hep.uchicago.edu
>anonymous ftp: aupc1.uchicago.edu pub/auger/pryke
>**********************************************************************
>
>
>-
>To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
>the body of a message to majordomo@vger.rutgers.edu
>
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
