Poor performance with 3Ware 7506LP RAID
darren at 3x3x3.org
Thu Dec 23 11:40:09 PST 2004
>> we have performance problem with 3Ware 7506LP RAID5. For example if we
>> execute rsync for large array of data, then
>> 'systat -vmstat' shows 100% load on twed0, and many other processes
>> wait disk I/O.
>> Also, which SATA RAID controller would you recomend for
>> Samba/Courier-IMAP server for company with 80 users?
> I think the 7xxx series is not so great for RAID5 speed wise. I know on
> our 7810, its lucky to get 15MB/s on block writes on 6 160G
> ST3160021A... I havent tested the 8xxx series in RAID5, but supposedly
> they are faster as is the 9000. But I dont know about the stability of
> the 9xxx series drivers (twe vs twa). If speed and reliability is what
> you want, look at RAID10. Our one mail server on RAID10 sees about
> 15-40 concurrent connections a second at peak times. With a lot of RAM
> and Maildir format, there is hardly any blocking going on.
I'm running a 9500 on 5.3-STABLE with 4x250 RAID 5, performance is solid
and it's totally stable. Can't say the same for the 3dm2 software, tho.
Still no luck getting that up and running.
More information about the freebsd-stable