1 Reply Latest reply on Jan 2, 2010 7:23 PM by gossd

    seq. write tanked after ssd toolbox optimization

    gossd

      good lord..what's going on?! after running ssd toolbox optimization, the drive's small-sized sequential write speeds tanked to ~4mb/sec, it was in ~30mb/sec before the optimization.. any ideas?

       

      before:

      ---------------------------------------------------------------
      CrystalDiskMark 3.0 Beta2 (C) 2007-2009 hiyohiyo
                         Crystal Dew World : http://crystalmark.info/
      ---------------------------------------------------------------

       

                 Sequential Read :  256.878 MB/s
                Sequential Write :   78.799 MB/s
               Random Read 512KB :  202.917 MB/s
              Random Write 512KB :   62.591 MB/s
          Random Read 4KB (QD=1) :   21.032 MB/s [  5134.7 IOPS]
         Random Write 4KB (QD=1) :   31.544 MB/s [  7701.2 IOPS]
         Random Read 4KB (QD=32) :  158.996 MB/s [ 38817.4 IOPS]
        Random Write 4KB (QD=32) :   59.246 MB/s [ 14464.2 IOPS]

       

        Test : 500 MB [C: Used 31.5% (23.5/74.5 GB)]

       

       

      after:

      ---------------------------------------------------------------
      CrystalDiskMark 3.0 Beta2 (C) 2007-2009 hiyohiyo
                         Crystal Dew World : http://crystalmark.info/
      ---------------------------------------------------------------

       

                 Sequential Read :  255.542 MB/s
                Sequential Write :   57.406 MB/s
               Random Read 512KB :  196.012 MB/s
              Random Write 512KB :   56.329 MB/s
          Random Read 4KB (QD=1) :   20.368 MB/s [  4972.6 IOPS]
         Random Write 4KB (QD=1) :    4.098 MB/s [  1000.5 IOPS]
         Random Read 4KB (QD=32) :  157.508 MB/s [ 38454.2 IOPS]
        Random Write 4KB (QD=32) :    4.366 MB/s [  1065.9 IOPS]

       

        Test : 500 MB [C: Used 32.8% (24.4/74.5 GB)]

        • 1. Re: random write tanked after ssd toolbox optimization
          gossd

          so i switched the achi mode from raid mode in the bios and the results returned to pre-optimization level or even better:

          ---------------------------------------------------------------
          CrystalDiskMark 3.0 Beta2 (C) 2007-2009 hiyohiyo
                             Crystal Dew World : http://crystalmark.info/
          ---------------------------------------------------------------

           

                     Sequential Read :  258.652 MB/s
                    Sequential Write :   88.130 MB/s
                   Random Read 512KB :  200.476 MB/s
                  Random Write 512KB :   88.656 MB/s
              Random Read 4KB (QD=1) :   20.743 MB/s [  5064.1 IOPS]
             Random Write 4KB (QD=1) :   51.535 MB/s [ 12581.9 IOPS]
             Random Read 4KB (QD=32) :  159.902 MB/s [ 39038.5 IOPS]
            Random Write 4KB (QD=32) :   64.472 MB/s [ 15740.1 IOPS]

           

            Test : 500 MB [C: Used 32.4% (24.1/74.5 GB)]

           

          what's a little odd and i don't quite understand yet is that prior to optimization i was under raid mode also (even though the system drive wasn't raid'ed).. it seems that the optimization done something that i don't fully understand to make it raid/achi sensitive..