-----Original Message----- From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Feizhou Sent: Sunday, September 16, 2007 9:35 AM To: CentOS mailing list Subject: Re: [CentOS] Software Raid 6 Feizhou wrote: > Juan C. Valido wrote: >> How slow and how reliable is software raid 6 on CentOS 5. The system I'm >> going to use is A socket 939 dual core Athlon, 4 gigs of ram and a 3ware >> 7506-8 controller. Its mostly going to be used for storage (Movies, MP3s >> etc.). Thanks. >> Argh...just read the SOFTWARE RAID 6. Man, does the 3ware turn me into hardware mode... I do not know...I personally have stayed away from linux software raid for raid5/6. You might actually find raid10 hardware mode to be faster than software raid 5/6 but at the cost of less storage and but better reliability in power loss cases. > > The 7506 does not have any cache. Its ASIC chips have very limited > storage. You are far better off running in raid10 with the 75xx and 85xx > series. Those cards are especially slow when you get a degraded array > in raid5 or raid6 (not sure if the 75xx or the 85xx support raid6) mode > due to the lack of cache. > > So you get the benefit of multiple spindles but I personally will not > use anything but raid1 or raid10 with a 75xx or 85xx series 3ware board. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos _______________________________________________ CentOS mailing list CentOS at centos.org http://lists.centos.org/mailman/listinfo/centos Thanks, that's what I'm running now, I guess I'll add more space elsewhere.