Hi all
I have a RAID 5 array consisting of 8 300GB Maxtor SATA drives (6B300S0), hooked up to a Asus A8N-SLI deluxe motherboard with 4 NForce4 SATA ports and 4 SiI 3114 ports.
see [3] for a description of what I did and more details.
each single disk in the array gives a read performance (tested with dd) of about 62MB/s (when reading the first 4GiB of a disk).
the array (reading the first 8GiB from /dev/md0 with dd, bs=1024K) performs at about 174MiB/s, accessing the array through LVM2 (still with bs=1024K) only 86MiB/s.
my first conclusion was to leave out the LVM2 of the loop and directly put a file system on /dev/md0.
however, when reading Neil Brown's article [1], I got the impression that my system should perform better, given the fact that each disk has a transfer rate of minimally 37MiB/s, maximally 65MiB/s [2].
or is there a flaw in my argumentation and the current performance is normal? are at last the controllers saturating?
any suggestions are welcome.
regards nicola
[1]: http://cgi.cse.unsw.edu.au/~neilb/01102979338 [2]: http://www.storagereview.com/articles/200410/200410087B300S0-2_2.html [3]: http://variant.ch/phpwiki/WikiBlog/2005-02-27 - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
