Slow Speeds In Raid 0 3-way

[R0H1T]

SO....... I was given an answer on another thread in here about trim support for raid. According to this person, trim is NOT supported with RAID 0 on an amd board. So im gonna quit looking for awhile. so what i did is change everything back to ACHI and I created a spanned volume in windows disk manager. I cant manually trim the drive but i ran Trimcheck 0.7 and it says that trim appears to be working!!! i also have a 4gb cache set up for the drive and i get up to 4gb/s read speed (I have the cache set up for read only). I dont know if this is wise, but its what ive been playing around with lately.

In which case you can breathe a certain sigh of relief. Look here's what I think you should do ~

1. Put 2 SSD's in RAID0, make two RAID0 arrays. Now Use Primocache & allocate as much memory as you possibly can for L1 cache, then use the second RAID0 array as L2 cache for your system drive ~ which I'm assuming is going be the two 850's in RAID0. Also get a UPS because whenever you're using a cache buffer you're bound to have a (potentially critical) data loss scenario, so better be safe than sorry. Just an FYI don't disable the pagefile whenever you're using any caching software.
2. Use one of the 850's as a single system boot drive, then use RAPID & again allocate as much RAM as possible for caching. Use the rest of the three drives in RAID0 & move your pagefile, temp (appdata/local & windows) folders over to that array so that their(RAID0) performance isn't totally wasted.

I got myself a couple of LITEON (LCS-256L9S) OEM 256GB drives recently & have been using them as system drive in RAID0 on an H97m mobo + Pentium G3258 with Seagate 2TB as data drive. I'm a little light on RAM atm but as soon as I add more I'm going to use Primocache or Condusiv's v-locity endpoint for caching, will add a UPS as well.

 

[R0H1T]

One more thing, on modern SSD's TRIM is not a deal breaker, especially the 850 PRO ~ www.techpowerup.com/forums/threads/ssd-raid-0-no-trim-big-deal.162502/

What you can do to compensate for lack of TRIM, though I do hope that AMD will add support for RAID arrays eventually, is to allocate more drive space for OP &/or move the temp folders to a dedicated RAMdisk plus move your frequently used data there. This is indeed a chipset limitation but if you want the speed of a RAID0 array then you'll have to sacrifice TRIM on an AMD platform, at least for the time being.