SSD in RAID0

Jordan97

Jordan97

Jordan97

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Hi all, just a quick question,

I am right in saying that if you put two SSD's in RAID0, TRIM will be disabled?
 
If the ssd drive is part of a raid array, then no trim

The confusing is with this.

trim will reach an ssd drive if its in a system with a raid array, but not part of it.

hope this makes sense, its how i understand it anyway,

Some smarty pants will sure correct me if im wrong :(
 
Hi

If you have two SSD Drives combined in RAID 0, manual TRIM with windows tools such as SSD Tool 0.95 or SSD Tweaker Pro Edition
should still work, shouldn't it? or dose manual TRIM not work at all ether when on RAID?

Can anybody answer this for me please.

Thanks for responding.

Sylver123
 
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Sylver123 said:
Hi

If you have two SSD Drives combined in RAID 0, manual TRIM with windows tools such as SSD Tool 0.95 or SSD Tweaker Pro Edition
should still work, shouldn't it? or dose manual TRIM not work at all ether when on RAID?

Can anybody answer this for me please.

Thanks for responding.

Sylver123
Click to expand...

No, Trim commands can not currently be passed through to drives in RAID0 on Intel onboard. This applies to both the automatic and any manual utilities.

Don't worry about it too much, the speed benefits from striping more than outway performance lost through lack of trim under normal usage scenarios with any recent generation of SSD. Do try to avoid running drive benchmarks over and over again as that sort of thing puts a lot of strain on the garbage collection and will slow your drive down for a while until it can sort itself out.
 
I thought those utilities like I mentioned above don't need to execute Trim commands to the drives as the only fill the drive with dummy blank files or something to overwrite data still in free space and acting like Trim.

or have I got that completely wrong about those two utilities?

I`m sure utilities like those I mentioned above was recommended for older SSDs that didn't have Trim built in.
 
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Sylver123 said:
I thought those utilities like I mentioned above don't need to execute Trim commands to the drives as the only fill the drive with dummy blank files or something to overwrite data still in free space and acting like Trim.

or have I got that completely wrong about those two utilities?

I`m sure utilities like those I mentioned above was recommended for older SSDs that didn't have Trim built in.
Click to expand...

In my experience they don't make any positive difference to the performance of my RAID0 array of Intel drives.
They work by creating zeroed files, the theory is that writing a zeroed file to a block on an ssd is the same as erasing it, so that later on when your file system issues a command to overwrite that area with some useful data (the only way an SSD finds out that a block is supposed to be empty in a non TRIM system) it doesn't need to be erased first.
SSD's nowadays have large enough spare areas for scratch space, plenty of RAM and clever enough controllers that this isn't really necessary though - they can free up new blocks whilst being written at a fast enough rate that write speeds don't suffer.
 
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