[ILUG] Good Linux SATA RAID Controller

[FRLinux]

On Thu, Oct 1, 2009 at 8:44 AM, stephen mulcahy
<smulcahy at atlanticlinux.ie> wrote:
> So, in a vague handy-wavey type conclusion without going into what kind of
> disks you have, what filesystems you are using and what kind of machine it's
> all installed in - it looks like the 3ware has pretty good read speed (which
> you'd expect if it's smart enough to do reads from both drives) but pretty
> poor write speed, relatively. It'd be interesting to see equivalent bonnie
> results if you switched the drives to software RAID (it'd be interesting to
> see results from my 1yr old machine using RAID aswell -  but probably like
> yourself, I have only limited time for testing these things).

Howdy!

The 2 drives are Seagate Barracuda 7200.11 1,5TB, SATA, 7200RPM, 32MB
(# ST31500341AS).

As I said, this is the cheapest 3ware card I have (2 ports only, no
BBU). They are RAID1.

also tried on soft raid on a cheapish system:

 bonnie++ -n 0 -u 0 -r 512 -s 1024 -f -b -d /mnt/backups/
Using uid:0, gid:0.
Writing intelligently...done
Rewriting...done
Reading intelligently...done
start 'em...done...done...done...
Version 1.03d       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
europa           1G           52464  40 27003  12           65510  17 168.8   1
europa,1G,,,52464,40,27003,12,,,65510,17,168.8,1,,,,,,,,,,,,,

Drives are ST3400832AS. But old generation.

Cheers,
Steph