freebsd-performance Digest, Vol 4, Issue 7

[Jin Guojun [DSD]]

Doug Clements wrote:

> On Wed, Jun 18, 2003 at 11:52:55AM -0700, Jin Guojun [DSD] wrote:
> > Recently, we tested software RAID via CCD and VINUM, and compared
> > them to adaptec 2xxx RAID controller. The performance is the same.
> > The CPU are Xeon 2.8 GHz, SuperMicro MB with ServerWork Chipset.
> > Seagate 3147xxxxLC drives.
> >
> > Problem is the write is slow for all of them, especially when multiple writes.
> >
> > Heard from Adaptect that their 5400 RAID has best performance, but
> > never had one for testing.
> >
> > So, soft RAID is ok to save bucks for hardware.
>
> How was CPU usage during the tests?

Very minimum.
It was slow on SCSI bus , but I do not have time to diagnose,
which can be very time consuming.

    -Jin