Guest Jordan Posted May 31, 2008 Posted May 31, 2008 I have purchased an addon eSATA II card wtih two ports and a box that has two eSATA 5 port multipliers for a total of 10 disks. I am using Windows 2000 Disk Manager to setup two RAID 5 sets with 5 disks each and each have a total of almost 2TB available. I am doing some speed testing with various utilities and it seems that small liniar and random reads have very poor performance (25 - 50% slower). It is only when the utilities test larger files above 500 KB where I start seeing higher performance than just putting a single disk on the controller rather than the 5 disk stripe. Is this normal for RAID 5 to have poor small data performance and only slightly better large file performance?
Guest David Posted June 2, 2008 Posted June 2, 2008 Re: Raid 5 speed issues I would advise that you look at purchasing a dedicated RAID 5 controller card. Software is very slow as it adds extra load on the processor, memory etc of the system "Jordan" <none@here.com> wrote in message news:OBcAAsxwIHA.3780@TK2MSFTNGP03.phx.gbl... >I have purchased an addon eSATA II card wtih two ports and a box that has >two eSATA 5 port multipliers for a total of 10 disks. I am using Windows >2000 Disk Manager to setup two RAID 5 sets with 5 disks each and each have >a total of almost 2TB available. > > I am doing some speed testing with various utilities and it seems that > small liniar and random reads have very poor performance (25 - 50% > slower). It is only when the utilities test larger files above 500 KB > where I start seeing higher performance than just putting a single disk on > the controller rather than the 5 disk stripe. > > Is this normal for RAID 5 to have poor small data performance and only > slightly better large file performance? > >
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