On Sat, Jun 25, 2005 at 12:06:14PM +0100, Allan Stirling wrote: > > Here's the results from my array, which is a 8 disk RAID5, spread over 2 > SATA controllers on a PCI-X dual Xeon (yes, I believe overkill _is_ just > a word): > Sweet setup. I don't believe you've reached overkill yet ;-)
> hdparm -Tt /dev/sda > > /dev/sda: > Timing cached reads: 2204 MB in 2.00 seconds = 1101.07 MB/sec > Timing buffered disk reads: 374 MB in 3.01 seconds = 124.31 MB/sec > > The 'buffered disk reads' is the line you're looking for. And 124Mb / > sec is quite good for this type of setup. > Neat! I didn't know you could run hdparm against non-[S]ATA devices. I'd guess only these tests work, though. Just for comparisons (3ware 8506, 4 Maxtor 7Y250M0s RAID5, dual AthlonMP): # hdparm -Tt /dev/sda /dev/sda: Timing cached reads: 1124 MB in 2.00 seconds = 560.96 MB/sec Timing buffered disk reads: 478 MB in 3.00 seconds = 159.20 MB/sec The wife has given me the go-ahead to build a new storage system (the current 750GB array has topped out with HDTV programs, and I haven't made a significant dent in the DVD library transfer process). I've planned a dual Opteron 246 box with a 3Ware 9500S-12 PCI-X controller. It has Online-Capacity-Expansion, so I can buy my favorite Maxtor 7Y250M0's a few at a time and keep the initial outlay down a bit. > Cheers, > > Allan. -- Trey
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