Date: Fri, 15 May 1998 16:42:35 -0700 (PDT) From: Chris Timmons <skynyrd@opus.cts.cwu.edu> To: The Hermit Hacker <scrappy@hub.org> Cc: scsi@FreeBSD.ORG Subject: Re: Atrocious transfer rates... Message-ID: <Pine.BSF.3.96.980515163943.10509A-100000@opus.cts.cwu.edu> In-Reply-To: <Pine.BSF.3.96.980515134003.304A-100000@hub.org>
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You'll also want to be careful with the L912 firmware on the XP34300W; there are known problems which are fixed in L915 firmware. cvsup.freebsd.org couldn't keep running on those disks until we upgraded the firmware. Search the archives - Justin figured out the problem some time ago. Probably CAM will treat you better than the old code did when the drives flake on you... -Chris On Fri, 15 May 1998, The Hermit Hacker wrote: > > Hi... > > Well, just plugged in the newest CAM snapshot, got everything > compiled and installed, and am getting terrible transfer rates, as far as > I can tell...granted, I just might be missing something in my kernel > config, but I swear my pre-CAM kernel had better performance, with pretty > much no change in settings. > > By slower, I mean that the VIKING II below, that I ran IOZONE on > several times with the older driver, was reporting closer to 11Meg/s... > > ==================================================================== > hub> dmesg | grep da2 > da2 at ahc1 bus 0 target 1 lun 0 > da2: <Quantum XP34300W L912> Fixed Direct Access SCSI2 device > da2: Serial Number PCB=JF60324939 U; HDA=MP62542171 > da2: 20.0MB/s transfers (10.0MHz, offset 8, 16bit), Tagged Queueing > Enabled > da2: 4101MB (8399520 512 byte sectors: 255H 63S/T 522C) > (da2:ahc1:0:1:0): tagged openings now 37 > (da2:ahc1:0:1:0): tagged openings now 36 > > Writing the 69 Megabyte file, 'iozone.tmp'...34.046875 seconds > Reading the file...39.593750 seconds > > IOZONE performance measurements: > 2125062 bytes/second for writing the file > 1827352 bytes/second for reading the file > hub# df . > Filesystem 1K-blocks Used Avail Capacity Mounted on > /dev/da2s1a 992751 461077 452254 50% /usr/local/httpd > ====================================================================== > > da1 at ahc1 bus 0 target 0 lun 0 > da1: <Quantum XP34300W L912> Fixed Direct Access SCSI2 device > da1: Serial Number PCB=JF60539596 U; HDA=MP61750113 > da1: 20.0MB/s transfers (10.0MHz, offset 8, 16bit), Tagged Queueing > Enabled > da1: 4101MB (8399520 512 byte sectors: 255H 63S/T 522C) > (da1:ahc1:0:0:0): tagged openings now 36 > (da1:ahc1:0:0:0): tagged openings now 33 > > Writing the 62 Megabyte file, 'iozone.tmp'...34.695312 seconds > Reading the file...27.132812 seconds > > IOZONE performance measurements: > 1873789 bytes/second for writing the file > 2396055 bytes/second for reading the filehub > # df . > Filesystem 1K-blocks Used Avail Capacity Mounted on > /dev/da1s1a 992751 572953 340378 63% /news > ====================================================================== > > hub# dmesg | grep da0 > da0 at ahc0 bus 0 target 0 lun 0 > da0: <QUANTUM VIKING II 4.5WSE 3506> Fixed Direct Access SCSI2 device > da0: Serial Number 194805310043 > da0: 20.0MB/s transfers (10.0MHz, offset 8, 16bit), Tagged Queueing > Enabled > da0: 4350MB (8910423 512 byte sectors: 255H 63S/T 554C) > (da0:ahc0:0:0:0): tagged openings now 63 > > Writing the 82 Megabyte file, 'iozone.tmp'...13.632812 seconds > Reading the file...15.726562 seconds > > IOZONE performance measurements: > 6307079 bytes/second for writing the file > 5467388 bytes/second for reading the filehub > # df . > Filesystem 1K-blocks Used Avail Capacity Mounted on > /dev/da0s1d 1477506 927430 431876 68% /var > ======================================================================= > > hub# dmesg | grep ahc > ahc0: <Adaptec 2940 Ultra SCSI adapter> rev 0x00 int a irq 10 on pci0.11.0 > ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs > ahc1: <Adaptec 2940 Ultra SCSI adapter> rev 0x01 int a irq 11 on pci0.12.0 > ahc1: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-scsi" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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