SB850 Very Poor RAID Performance

[Cecil]

Ive been using one Super Talent Ultradrive GX 64gb SSD in AHCI, and was getting 225Mb/s average. Added a second one, did a fresh install (used sanitary erase to wipe them) set stripe size to 128k, dissabled drive indexing and super fetch, enabled write caching and NCQ. Im getting about 145Mb/s average now. With no tweaks I got about the same.

RAID0 (before tweaks)


Single

[onex]

you might want to go over this thread, it might give you some tips .

[Cecil]

you might want to go over this thread, it might give you some tips .

I saw that thread, didnt really see much that I didnt do.

However, I see now hdtune is a bad bench to use, running other ones show about 375 reads, 250 writes, which is still pretty poor.



Tried increasing SB voltage to 1.15 from 1.1,

[felix_w]

Edit: Not functioning well in the morning.......So m/b is the ASUS M4A89GTD-PRO/USB3...

Which raid drivers did you use & which firmware do the SuperTalents have ?

[GullLars]

Have you downloaded and installed RAIDXpert? You need it to activate NCQ for RAID. Pretty retarded of AMD to make it that way IMO.

[F@32]

I saw that thread, didnt really see much that I didnt do.

Not sure if you are on XP or not.

1. If not 7 or Vista - you need to manually align partition
2. C1E and C&Q off
3. SATA3 off
4. 8.71 chipset, AHCI and RAID drivers
5. NCQ on in RAIDXpert
6. Write back caching on
7. Buffer flushing off

You will still not see linear scaling as on ICH10R which is one of the best $/performance controllers out there.

[[XC] Oj101]

Unfortunately, AMD have traditionally been bad at making RAID controllers. What I suggest is, as you won't see a noticable difference between a single drive and two in RAID while doing day to day tasks, is just enjoy the extra storage you have on the volume

[onex]

p.s - did you try going for 64KB stripes?
maybe a driver issue..