My Promise Ultra 100TX2 produces dismal Simultaneous Disk I/O
performance on Sysbench 0.9.5 with my Seagate Barracuda IV 60GB:

 Simultaneous Disk I/O
   Disk 0-1: 57239 MB    :       10.511    Megabytes/second
   Disk 1-2: 78529 MB    :       54.425    Megabytes/second
  
-----------------------------------------------------------------------
   Total                 :       64.936    Simultaneous I/O-marks

 Disk I/O disk 0-1: 57239 MB - ST360021A
   Avg. data access time :       14.700    milliseconds
   Cache/Bus xfer rate   :       51.544    Megabytes/second
   Track 0 xfer rate fwd :       39.663    Megabytes/second
   Middle trk rate fwds. :       38.258    Megabytes/second
   Last track rate bwds. :       23.559    Megabytes/second
   Average Transfer rate :       33.826    Megabytes/second
   Disk use CPU load     :        5.280    percent
  
-----------------------------------------------------------------------
   Total                 :      193.206    Disk I/O-marks

 Disk I/O disk 1-2: 78529 MB - IC35L090AVV207-0
   Avg. data access time :       12.300    milliseconds
   Cache/Bus xfer rate   :       62.464    Megabytes/second
   Track 0 xfer rate fwd :       54.508    Megabytes/second
   Middle trk rate fwds. :       47.127    Megabytes/second
   Last track rate bwds. :       32.424    Megabytes/second
   Average Transfer rate :       44.686    Megabytes/second
   Disk use CPU load     :        6.870    percent
  
-----------------------------------------------------------------------
   Total                 :      252.029    Disk I/O-marks

Here are the same two disks with only the Hitachi on the TX2 (Seagate
running on motherboard's UDMA33):

 Simultaneous Disk I/O
   Disk 0-1: 57239 MB    :       15.104    Megabytes/second
   Disk 1-2: 78529 MB    :       29.247    Megabytes/second
  
-----------------------------------------------------------------------
   Total                 :       44.352    Simultaneous I/O-marks

 Disk I/O disk 0-1: 57239 MB - ST360021A
   Avg. data access time :       14.700    milliseconds
   Cache/Bus xfer rate   :       23.604    Megabytes/second
   Track 0 xfer rate fwd :       15.218    Megabytes/second
   Middle trk rate fwds. :       15.796    Megabytes/second
   Last track rate bwds. :       20.660    Megabytes/second
   Average Transfer rate :       17.225    Megabytes/second
   Disk use CPU load     :        3.610    percent
  
-----------------------------------------------------------------------
   Total                 :      101.512    Disk I/O-marks

 Disk I/O disk 1-2: 78529 MB - IC35L090AVV207-0
   Avg. data access time :       12.300    milliseconds
   Cache/Bus xfer rate   :       62.532    Megabytes/second
   Track 0 xfer rate fwd :       54.452    Megabytes/second
   Middle trk rate fwds. :       47.131    Megabytes/second
   Last track rate bwds. :       32.452    Megabytes/second
   Average Transfer rate :       44.678    Megabytes/second
   Disk use CPU load     :        6.810    percent
  
-----------------------------------------------------------------------
   Total                 :      252.057    Disk I/O-marks
-- 
"Each one should use whatever gift he has received to serve others..."
                                                1 Peter 4:10 NIV

 Team OS/2 ** Reg. Linux User #211409

Felix Miata  ***  http://members.ij.net/mrmazda/



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