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Date:      Tue, 13 Jul 1999 23:18:35 -0400 (EDT)
From:      Mikhail Teterin <mi@kot.ne.mediaone.net>
To:        questions@freebsd.org, scsi@freebsd.org
Subject:   SEAGATE ST34371W on an NCR -- slow :(
Message-ID:  <199907140318.XAA25283@kot.ne.mediaone.net>

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I'm getting a dissapointingly low performance from the only disk on the
ncr0:

ncr0: <ncr 53c875 fast20 wide scsi> rev 0x37 int a irq 21 on pci0.13.0
ncr1: <ncr 53c875 fast20 wide scsi> rev 0x37 int b irq 22 on pci0.13.1
[...]
da0 at ncr0 bus 0 target 3 lun 0
da0: <SEAGATE ST34371W 0440> Fixed Direct Access SCSI-2 device 
da0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled
da0: 52MB (8496884 512 byte sectors: 255H 63S/T 528C)

This  is a  dual  PII-300MHz system  with 64Mb  of  RAM running  FreeBSD
3.2-STABLE from Wed Jul 7.

The iozone's numbers are:

        File size set to 80000 KB
        Time Resolution = 0.000015 seconds.
        Processor cache size set to 1024 Kbytes.
        Processor cache line size set to 32 bytes.
        File stride size set to 17 * record size.

						    random  random
      KB  reclen   write rewrite    read    reread    read   write
   80000       4    3885    1460     4842     4474     415     208

    bkwd  record  stride                                   
    read rewrite    read   fwrite frewrite   fread  freread
     988  135635     543     5235     1533    4674     4803

Big things, like  Netscape and KDE take very long  to start up, probably
even longer then they used to take  on my older P90 system with the same
amount of RAM.

What should I be tuning? Thanks!

	-mi


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