Tips for RAID.

Joel Sloss

August 1, 1997

1 Min Read
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  • Separate I/O types: Keep write-intensive and read-intensive environmentson separate physical devices.

  • Keep random activity and sequential activity on separate devices.

  • Match the RAID level's characteristics to the volume in question; forexample, don't put a write-intensive application on a RAID 5 volume.

  • Use Fast drives, such as the new 10K-revolutions-per-minute

  • Use SCSI, not IDE or EIDE. SCSI's extensibility and performance far exceedIDE's for server applications (even EIDE maxes out at 17MBps data transferrates).

  • Use a RAID volume (such as 0) for your page file to enhance virtual memoryperformance.

  • Use multichannel hardware-accelerated disk controllers.

  • Keep an eye out for Intelligent I/O (I2O) devices, which offload I/O
    processing to dedicated CPUs on peripheral cards such as RAID and
    networkcontrollers. This approach achieves much greater throughput with a smallfraction of the impact on the system's main CPU(s).

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