On 09/08/2011 03:28 PM, Dennis Jacobfeuerborn wrote:
On 09/07/2011 10:55 PM, Jerry Geis wrote:
I grabbed a new SSD M4-CT064M4SSD2 from Crucial.I am disappointed. I stuck the unit in an Atom machine (zotac) with CentOS 6 on the disk. It really doesn't "feel" faster than the previous 5400 RPM drive that was in it.
The SSD is giving me (in the zotac running centos 6): hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 298 MB in 3.00 seconds = 99.30 MB/sec
Not sure about Centos 6 but I just got a new System with a Crucial M4 128G disk and and the difference to my previous non-ssd system is *huge*:
/dev/sda: Timing buffered disk reads: 700 MB in 3.00 seconds = 233.11 MB/sec
And that's just the throughput. What really is amazing is the reduced latency which makes the desktop fly.
100mb/s sound really broken though. Even the slowest ssd drives should give you more than that. Try installing Fedora 15 (what I'm using right now) and if you see the same performance then it might be a hardware problem. If the performance is much better under Fedora 15 though then there might be an issue with Centos 6 and ssd's (though I'm not sure what that could be in a simple read-only benchmark).
This just occured to me: are you maybe cpu bound? Since you use an atom based system maybe your system simply cannot deliver the full performance of the drive?
Regards, Dennis