Re: Software RAID5 with 2.6.0-test

Måns Rullgård
2003-10-09T08:55:53Z

Andre Tomt <andre@tomt.net> writes:

>> When I tried it, I was running 2.6.0-test4. The RAID5 was 4 120 GB
>> Seagate disks on a Highpoint controller.
>
> <snip>
>
>> The other thing that I don't like, is the performance of the RAID
>> array. The disks individually give ~40 MB/s read speed, but the array
>> only measures 25 MB/s. I was of the impression, that RAID5 would give
>> read speeds at least equal to the underlying disks. Is this
>> incorrect?
>
> Was this a 4 port or 2 port HPT controller? Keep in mind, two disks on
> the same IDE channel severely degrades performance, *especially* with
> RAID.

It's a four port SATA controller. I'd never even think about placing
two disks on the same cable.

--
Måns Rullgård
mru@users.sf.net