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| subject: | Re: Strangely bad disk performance |
=?ISO-8859-2?Q?Sini=b9a_Pavlovi=e6?= wrote:
> Hello, I think I have some configuration problem here and I would like some
> advice. I have Adaptec 2940UW with latest available BIOS, and two UW disks
> attached to it. One holds Boot Manager and NTFS W2K partition and another one
> two OS/2 HPFS partitions,one bootable and one data. I also have one IDE 80GB
> disk with several partitions (one FAT32 and two HPFS). These are results of
> sysbench:
> Disk I/O disk 0-1: 4338 MB - QUANTUM VIKING 4.5 WSE 8808
> Avg. data access time : 13.400 milliseconds
> Cache/Bus xfer rate : 7.377 Megabytes/second
> Track 0 xfer rate fwd : 10.241 Megabytes/second
> Middle trk rate fwds. : 9.195 Megabytes/second
> Last track rate bwds. : 5.934 Megabytes/second
> Average Transfer rate : 8.457 Megabytes/second
> Disk use CPU load : 1.520 percent
> -----------------------------------------------------------------------
> Total : 55.269 Disk I/O-marks
> Disk I/O disk 0-2: 4338 MB - QUANTUM VIKING 4.5 WSE 8808
> Avg. data access time : 13.400 milliseconds
> Cache/Bus xfer rate : 7.371 Megabytes/second
> Track 0 xfer rate fwd : 10.244 Megabytes/second
> Middle trk rate fwds. : 9.194 Megabytes/second
> Last track rate bwds. : 5.929 Megabytes/second
> Average Transfer rate : 8.456 Megabytes/second
> Disk use CPU load : 1.420 percent
> -----------------------------------------------------------------------
> Total : 55.715 Disk I/O-marks
> Disk I/O disk 1-3: 76317 MB - WDC WD800LB-55DNA0
> Avg. data access time : 19.200 milliseconds
> Cache/Bus xfer rate : 71.061 Megabytes/second
> Track 0 xfer rate fwd : 49.019 Megabytes/second
> Middle trk rate fwds. : 50.576 Megabytes/second
> Last track rate bwds. : 28.510 Megabytes/second
> Average Transfer rate : 42.701 Megabytes/second
> Disk use CPU load : 4.730 percent
> -----------------------------------------------------------------------
> Total : 243.826 Disk I/O-marks
> Performance of UW disks is so much worse than of IDE one. Why? Since the
> problem persists when I boot to W2K, I presume that the problem is in wrong
> setup of SCSI adapter and/or conflict with UW disks. I also have CD ROM, CD
> Writer and HP DAT device attached to 50 pins connector to Adaptec card. I'm
> open to any suggestion... Thank you in advance.
Your Vikings perform below the best UW disks for sure. What is looks
like to me is you have simply wide, not UW. Even UW can't touch a
fraction of current U100 disks. Here are a few others you can compare:
148
Processor - AMD K6-2 550
Storage Controller - Symbios (NCR) - 53C875 Ultra-Wide SCSI
Simultaneous Disk I/O
Disk 0-1: 4110 MB : 10.491 Megabytes/second
Disk 1-2: 4110 MB : 10.616 Megabytes/second
-----------------------------------------------------------------------
Total : 21.107 Simultaneous I/O-marks
Disk I/O disk 0-1: 4110 MB - QUANTUM FIREBALL SE4.3S PJ0A - ultra 50
pin
Avg. data access time : 16.500 milliseconds
Cache/Bus xfer rate : 17.278 Megabytes/second
Track 0 xfer rate fwd : 10.633 Megabytes/second
Middle trk rate fwds. : 9.604 Megabytes/second
Last track rate bwds. : 6.401 Megabytes/second
Average Transfer rate : 8.880 Megabytes/second
Disk use CPU load : 2.350 percent
-----------------------------------------------------------------------
Total : 55.771 Disk I/O-marks
Disk I/O disk 1-2: 4110 MB - QUANTUM FIREBALL SE4.3A - UDMA33
Avg. data access time : 15.100 milliseconds
Cache/Bus xfer rate : 26.978 Megabytes/second
Track 0 xfer rate fwd : 10.621 Megabytes/second
Middle trk rate fwds. : 9.591 Megabytes/second
Last track rate bwds. : 6.400 Megabytes/second
Average Transfer rate : 8.871 Megabytes/second
Disk use CPU load : 2.760 percent
-----------------------------------------------------------------------
Total : 56.464 Disk I/O-marks
201
Processor - AMD K6-2 500
Storage Controller - Symbios Logic (NCR) (LSI Logic) - 53C875 875XS/D,
2280X Ultra-Wide-SCSI Adapter
Simultaneous Disk I/O
Disk 0-1: 8676 MB : 6.443 Megabytes/second
Disk 0-2: 1028 MB : 3.188 Megabytes/second
Disk 0-3: 1035 MB : 3.102 Megabytes/second
-----------------------------------------------------------------------
Total : 12.733 Simultaneous I/O-marks
Disk I/O disk 0-1: 8676 MB - QUANTUM QM39100TD-SW N1B0 - Atlas 3 UW
7200
Avg. data access time : 12.600 milliseconds
Cache/Bus xfer rate : 25.653 Megabytes/second
Track 0 xfer rate fwd : 13.405 Megabytes/second
Middle trk rate fwds. : 12.405 Megabytes/second
Last track rate bwds. : 8.370 Megabytes/second
Average Transfer rate : 11.394 Megabytes/second
Disk use CPU load : 3.680 percent
-----------------------------------------------------------------------
Total : 70.002 Disk I/O-marks
Disk I/O disk 0-2: 1028 MB - QUANTUM EMPIRE_1080S 1242 - 50 pin SCSI-2
Avg. data access time : 17.700 milliseconds
Cache/Bus xfer rate : 7.860 Megabytes/second
Track 0 xfer rate fwd : 3.947 Megabytes/second
Middle trk rate fwds. : 3.680 Megabytes/second
Last track rate bwds. : 2.336 Megabytes/second
Average Transfer rate : 3.321 Megabytes/second
Disk use CPU load : 1.480 percent
-----------------------------------------------------------------------
Total : 23.907 Disk I/O-marks
Disk I/O disk 0-3: 1035 MB - QUANTUM FIREBALL1080S 1Q09 - 50 pin
SCSI-2
Avg. data access time : 16.700 milliseconds
Cache/Bus xfer rate : 7.868 Megabytes/second
Track 0 xfer rate fwd : 3.774 Megabytes/second
Middle trk rate fwds. : 5.042 Megabytes/second
Last track rate bwds. : 3.025 Megabytes/second
Average Transfer rate : 3.947 Megabytes/second
Disk use CPU load : 1.550 percent
-----------------------------------------------------------------------
Total : 27.677 Disk I/O-marks
336
Processor - AMD K6-2 550
Storage Controller - Symbios Logic (NCR) (LSI Logic) - 53C875 875XS/D,
2280X Ultra-Wide-SCSI Adapter
Simultaneous Disk I/O
Disk 0-1: 8746 MB : 7.065 Megabytes/second
Disk 0-2: 4330 MB : 7.067 Megabytes/second
-----------------------------------------------------------------------
Total : 14.133 Simultaneous I/O-marks
Disk I/O disk 0-1: 8746 MB - IBM DPSS-309170N S96H - UW 7200 RPM
Avg. data access time : 10.400 milliseconds
Cache/Bus xfer rate : 30.731 Megabytes/second
Track 0 xfer rate fwd : 29.585 Megabytes/second
Middle trk rate fwds. : 25.902 Megabytes/second
Last track rate bwds. : 20.268 Megabytes/second
Average Transfer rate : 25.252 Megabytes/second
Disk use CPU load : 7.870 percent
-----------------------------------------------------------------------
Total : 143.990 Disk I/O-marks
Disk I/O disk 0-2: 4330 MB - IBM DCHS04F 2525 - 50 pin
Avg. data access time : 12.500 milliseconds
Cache/Bus xfer rate : 3.692 Megabytes/second
Track 0 xfer rate fwd : 8.809 Megabytes/second
Middle trk rate fwds. : 8.325 Megabytes/second
Last track rate bwds. : 6.115 Megabytes/second
Average Transfer rate : 7.750 Megabytes/second
Disk use CPU load : 3.120 percent
-----------------------------------------------------------------------
Total : 47.904 Disk I/O-marks
366
Processor - AMD K6/3-560
Storage Controller - Symbios Logic (NCR) (LSI Logic) - 53C875 875XS/D,
2280X Ultra-Wide-SCSI Adapter
Simultaneous Disk I/O
Disk 0-1: 8746 MB : 29.586 Megabytes/second
Disk 1-2: 57239 MB : 16.672 Megabytes/second
-----------------------------------------------------------------------
Total : 46.258 Simultaneous I/O-marks
Disk I/O disk 0-1: 8746 MB - IBM DPSS-309170N S96H - UW 7200 RPM
Avg. data access time : 10.400 milliseconds
Cache/Bus xfer rate : 31.715 Megabytes/second
Track 0 xfer rate fwd : 29.742 Megabytes/second
Middle trk rate fwds. : 25.943 Megabytes/second
Last track rate bwds. : 20.310 Megabytes/second
Average Transfer rate : 25.332 Megabytes/second
Disk use CPU load : 4.870 percent
-----------------------------------------------------------------------
Total : 146.733 Disk I/O-marks
Disk I/O disk 1-2: 57239 MB - ST360021A
Avg. data access time : 14.700 milliseconds
Cache/Bus xfer rate : 35.203 Megabytes/second
Track 0 xfer rate fwd : 21.679 Megabytes/second
Middle trk rate fwds. : 21.633 Megabytes/second
Last track rate bwds. : 23.671 Megabytes/second
Average Transfer rate : 22.327 Megabytes/second
Disk use CPU load : 3.910 percent
-----------------------------------------------------------------------
Total : 130.503 Disk I/O-marks
435
Processor - Intel Celeron 2.4G
Storage Controller - LSI Logic (Was: Symbios Logic, NCR) - LSI53C896/7
PCI
to Dual Channel Ultra2 SCSI Multifunction ContLSI Log
Simultaneous Disk I/O
Disk 1-1: 8746 MB : 29.640 Megabytes/second
Disk 2-2: 76317 MB : 55.736 Megabytes/second
-----------------------------------------------------------------------
Total : 85.376 Simultaneous I/O-marks
Disk I/O disk 1-1: 8746 MB - IBM DPSS-309170N S96H - 7200 RPM LVD U2
Avg. data access time : 10.500 milliseconds
Cache/Bus xfer rate : 57.279 Megabytes/second
Track 0 xfer rate fwd : 29.752 Megabytes/second
Middle trk rate fwds. : 25.945 Megabytes/second
Last track rate bwds. : 20.321 Megabytes/second
Average Transfer rate : 25.340 Megabytes/second
Disk use CPU load : 4.250 percent
-----------------------------------------------------------------------
Total : 150.379 Disk I/O-marks
Disk I/O disk 2-2: 76317 MB - ST380011A
Avg. data access time : 15.200 milliseconds
Cache/Bus xfer rate : 81.018 Megabytes/second
Track 0 xfer rate fwd : 55.771 Megabytes/second
Middle trk rate fwds. : 46.401 Megabytes/second
Last track rate bwds. : 28.685 Megabytes/second
Average Transfer rate : 43.619 Megabytes/second
Disk use CPU load : 6.700 percent
-----------------------------------------------------------------------
Total : 247.653 Disk I/O-marks
440
Processor - AMD K6/3+ 550
Storage Controller - LSI Logic (Was: Symbios Logic, NCR) - LSI53C896/7
PCI
to Dual Channel Ultra2 SCSI Multifunction ContLSI Log
Simultaneous Disk I/O
Disk 0-1: 8746 MB : 24.817 Megabytes/second
Disk 0-2: 17508 MB : 25.394 Megabytes/second
-----------------------------------------------------------------------
Total : 50.211 Simultaneous I/O-marks
Disk I/O disk 0-1: 8746 MB - IBM DPSS-309170N S96H - 7200 LVD U2
Avg. data access time : 10.300 milliseconds
Cache/Bus xfer rate : 42.670 Megabytes/second
Track 0 xfer rate fwd : 29.730 Megabytes/second
Middle trk rate fwds. : 25.935 Megabytes/second
Last track rate bwds. : 20.280 Megabytes/second
Average Transfer rate : 25.315 Megabytes/second
Disk use CPU load : 4.900 percent
-----------------------------------------------------------------------
Total : 147.851 Disk I/O-marks
Disk I/O disk 0-2: 17508 MB - QUANTUM ATLAS_V_18_WLS 0230 - 7200 LVD U2
Avg. data access time : 10.500 milliseconds
Cache/Bus xfer rate : 44.248 Megabytes/second
Track 0 xfer rate fwd : 28.396 Megabytes/second
Middle trk rate fwds. : 24.491 Megabytes/second
Last track rate bwds. : 15.394 Megabytes/second
Average Transfer rate : 22.760 Megabytes/second
Disk use CPU load : 4.450 percent
-----------------------------------------------------------------------
Total : 134.516 Disk I/O-marks
--
"For since the creation of the world God's invisible qualities -- his
eternal power and divine nature -- have been clearly seen, being
understood from what has been made, so that men are without excuse."
Romans 1:20 NIV
Team OS/2 ** Reg. Linux User #211409
Felix Miata *** http://members.ij.net/mrmazda/partitioningindex.html
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