Date: Wed, 14 Jul 1999 16:39:04 +0930 From: Greg Lehey <grog@lemis.com> To: Mikhail Teterin <mi@kot.ne.mediaone.net>, questions@FreeBSD.ORG, scsi@FreeBSD.ORG Subject: Re: SEAGATE ST34371W on an NCR -- slow :( Message-ID: <19990714163904.17891@mojave.lemis.com> In-Reply-To: <199907140318.XAA25283@kot.ne.mediaone.net>; from Mikhail Teterin on Tue, Jul 13, 1999 at 11:18:35PM -0400 References: <199907140318.XAA25283@kot.ne.mediaone.net>
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On Tuesday, 13 July 1999 at 23:18:35 -0400, Mikhail Teterin wrote: > 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! I'd be interested to see what results rawio shows. It bypasses the buffer cache and measures raw disk performance. Take a look at ftp://ftp.lemis.com/pub/rawio.tar.gz. Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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