Disk Performance measurement for RAID and Software Raid 
 

							15 Apr 1999
							T. Ichihara (RIKEN)
 
Preliminary

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Hardware
   SUN Enterprise 450 : Solaris 2.6
      CPU: Dual Ultra2 sparc at 400MHz 
      Memory: 1280 MB Main Memory
      PCI Dual ultra-wide SCSI controller (diff.) (Ext. Raid connection)
      PCI Dual ultra-wide SCSI controller (single.) (Internal disks)

   External Raid System (raid0+1,raid4 or raid5)
      Controller: CMD CRD-5440-001/002 Ultra SCSI Raid Controller 
      Disk sub system: IBM 3.5" 36GB Disk driver 10 unit (1 for Hot spare)
      Host I/F: Ultra-Wide SCSI (differential)
      Product Name: IAI SNX96000E 	

Testing method
     Fortran unformatted IO write, read
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Bare Disk (Seagate 18GB ST318275LC internal, ultra-wide SCSI)

  File Write rate = 14.3  MB/S  (  200 MB    14. sec.)
  File Write rate = 12.58 MB/S  ( 2000 MB   159. sec.)

  File Read rate = 20.0  MB/S  (  200 MB    10. sec.)
  File Read rate = 19.05 MB/S  ( 2000 MB   105. sec.)
							
Hardware RAID4 288GB (CMD CRD-5440-001/002 Ultra SCSI Raid Controller
                      3.5" 36GB IBM HD x 10 unit  2 SCSI-Channel
 		      Block-size 128 KB, Product IAI SNX96000E) 

  File Write rate = 13.3  MB/S  (  200 MB    15. sec.)
  File Write rate = 12.90 MB/S  ( 2000 MB   155. sec.)

  File Read rate = 13.33 MB/S  (  200 MB    15. sec.)
  File Read rate = 14.18 MB/S  ( 2000 MB   141. sec.)

Hardware RAID5 288GB (CMD CRD-5440-001/002 Ultra SCSI Raid Controller
                      3.5" 36GB IBM HD x 10 unit  2 SCSI-Channel
 		      Block-size 128 KB : Product IAI SNX96000E)

  File Write rate = 14.3  MB/S  (  200 MB    14. sec.)
  File Write rate = 12.99 MB/S  ( 2000 MB   154. sec.)

  File Read rate = 16.7  MB/S  (  200 MB    12. sec.)
  File Read rate = 16.39 MB/S  ( 2000 MB   122. sec.)

Software RAID 0+1 (Solaris2.6 Disksuite)

  File Write rate = 11.1  MB/S  (  200 MB    18. sec.)
  File Write rate = 10.10 MB/S  ( 2000 MB   198. sec.)
  
  File Read rate = 25.00 MB/S  (  200 MB     8. sec.)
  File Read rate = 23.26 MB/S  ( 2000 MB    86. sec.)
     
Software RAID 5 (Solaris2.6 Disksuite)  

  File Write rate =  1.9  MB/S  (  200 MB   102. sec.)
  File Write rate =  1.80 MB/S  ( 2000 MB  1111. sec.)

  File Read rate = 28.57 MB/S  (  200 MB     7. sec.)
  File Read rate = 27.78 MB/S  ( 2000 MB    72. sec.)