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SSDs in raid-0?
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lolisiah
Newbie
_ 		18. March 2010 @ 07:50 _ Link to this message    Send private message to this user   
i have a question for who ever can answer.

I know that a SSD with TRIM is way better then a SSD with out TRIM. and i also know that if you put 2 SSDs is raid-0 configuration then you loss TRIM, but the question is "how long would you notice the performance decrease without having TRIM?" OR "is there a manual TRIM command to delete the unwanted blocks, that are no longer in use?"
[ + quote]
KillerBug
AfterDawn Addict

1 product review
_ 		19. March 2010 @ 01:06 _ Link to this message    Send private message to this user   
There are utilities that will do the TRIM manually, but they still don't work with RAID arrays.

There may be some RAID card out there that will pass along TRIM info to SSDs, but I have yet to see it.

The speed losses should not start until you have written the capacity of the drives, so a 400GB RAID-0 array would start to see significant speed losses as soon as you had written about 400GB of data total (even if it was only 1GB at a time, and you deleted it every time).

Oh, one other thing...the advantages of TRIM are not very noticable in most cases. Even if you have TRIM, SSDs still have to erase 256K-512K at a time. Considering most files are considerably larger than 256K, the speed advantages of RAID-0 are still there...they just are not as noticable on smaller files.
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This message has been edited since posting. Last time this message was edited on 20. March 2010 @ 03:33
lolisiah
Newbie
_ 		20. March 2010 @ 06:07 _ Link to this message    Send private message to this user   
Originally posted by KillerBug:
 There are utilities that will do the TRIM manually, but they still don't work with RAID arrays.

There may be some RAID card out there that will pass along TRIM info to SSDs, but I have yet to see it.

The speed losses should not start until you have written the capacity of the drives, so a 400GB RAID-0 array would start to see significant speed losses as soon as you had written about 400GB of data total (even if it was only 1GB at a time, and you deleted it every time).

Oh, one other thing...the advantages of TRIM are not very noticable in most cases. Even if you have TRIM, SSDs still have to erase 256K-512K at a time. Considering most files are considerably larger than 256K, the speed advantages of RAID-0 are still there...they just are not as noticable on smaller files.
Finally a good answer, i was reading alot out there about the whole "SSD" thing, and i was also wandering if its even worth getting it now? do you think its better if we should wait for better SSD's or are they somewhat at its peek?
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A$E

This message has been edited since posting. Last time this message was edited on 20. March 2010 @ 06:08
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