Im using the Samsung F3 disks, which can do 140MB/s sequentially. I have
tried different raids raid0 will do just as bad as raid5. I even tried
one disk which performed as expected 100MB/s+ reads and writes so I'm
not sure anymore what could be the problem. Maybe the controller hates
samsung disks?
-zsozso
On 2010.06.19. 0:21, krad wrote:
On 18 June 2010 10:08, oizs<o...@freemail.hu> wrote:
I've seen people with the same configuration doing 160MB/s writes and
250MB/s+ reads with raid5 so I still think something isn't right. And using
raid10 with 4 disks is a rather large waste of capacity.
-zsozso
On 2010.06.18. 1:55, Chuck Swiger wrote:
On Jun 17, 2010, at 4:50 PM, oizs wrote:
I've bought a Dell Perc 5/i because I couldn't make the onboard marvell
88sx7042 work with 8.0/8.1 or current, but as lucky as I am, the best I can
do with 4x1.5tb samsung in raid5 is 60MB/s writes and 90MB/s reads, with
bbu/write-back/adaptive-read-ahead.
I was expecting at least twice of that, and I'm not sure what can I do to
get that speed. (I've read man 7 tuning with no success)
Switch to using RAID-10 rather than RAID-5. It's normal for RAID-5 to
have worse write performance than that of a single drive.
Regards,
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what are your drives though? Are they SATA green/eco type drives or proper
SAS enterprise ones
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