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.
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