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Conference ssag::ask_ssag

Title:Ask the Storage Architecture Group
Notice:Check out our web page at http://www-starch.shr.dec.com
Moderator:SSAG::TERZAN
Created:Wed Oct 15 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:6756
Total number of notes:25276

6705.0. "Raw performance for RAID and Non-RAID adapters" by VAXRIO::CUPOLILLO () Tue May 20 1997 06:00

    
         Hi,
    
         A customer asked me which is the overhead of the RAID processing in a 
    SCSI adapter when compared with a non RAID SCSI adapter.  In other
    words, for a single I/O operation with a transfer size that fits in
    one track (no seeks involved) what would be the percent difference in
    time from execute this operation from a RAID SCSI adapter (suposed to be
    using a RAID 5 configuration) and a non-RAID one?
    
         May we consider the performance of a RAID SCSI adapter configured
    as JBOD equal to a Non-RAID adapter?
    
         Thanks,
    
         Cupol
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