[mythtv-users] SATA Drive Failure

Trey Boudreau trey at treysoft.com
Sat Jun 25 18:22:02 UTC 2005

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

# hdparm -Tt /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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