Samsung 840 Pro RAID TRIM support

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siriuslee

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Feb 19, 2012
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Morning, i have 2x Samsung Pro 840 256GB SSD in a RAID 0 set up, which is solely for windows 7 64 bit i.e emails, docs, photos etc... But also i have a Corsair Neutron GTX 240GB SSD which is not in RAID which i only use for my games only.

I have heard that a RAID set up will not support TRIM, but i had the latest R600 chipset RAID driver installed when doing my fresh install of windows. Some website say that TRIM degrades the performance of the SSD over time.

But my question is, my RAID set up is only for windows plus emails photos as mentioned before, so the load on the drives should be low, and the neutron is for my games, so as the RAID set up ideally will not be doing as heavy works as my games drive, should the SSD last longer even though they will not be using TRIM.
 
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aramisathei

aramisathei

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Whether or your RAID setup supports TRIM depends on your raid card/controller.
The z77 chipset (recent Ivy Bridge boards) does with a firmware update, but you'll have to check for your specific board.

TRIM does not degrade SSDs; TRIM removes unnecessary files from the SSD so that open space is available when the SSD needs to write new data. Not having TRIM is what will degrade your performance over time unless you do frequent secure erases. Even then, TRIM is still recommended. I think what you're talking about is "write-thrashing" where there are multiple write sequences to your SSD for minor functions. That will reduce your SSD life quite a bit, but that has nothing to do with TRIM.

Honestly, there's no reason to use RAID 0 for your setup. You aren't doing anything that would merit the gains in read/write speed, and have an increased liability of data loss. And if your chipset doesn't support TRIM, then your SSDs are taking a hit there as well.

In short, your SSDs should "last" about as long either way, but they'll function a lot more slowly without TRIM.
 
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aramisathei

aramisathei

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The x79 chipset is older than the z77 chipset so some features can't be added by a firmware update.

The x79 actually does support TRIM via a firmware update though.
http://rog.asus.com/forum/showthread.php?26501-RIVE-3301-Patched-for-TRIM-in-RAID
Running 2 830s on RAID 0 on a RIVE.
 
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aramisathei

aramisathei

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TRIM is a command passed to the SSD through the mobo by the OS.
So long as the SSD supports the TRIM function (which 840s do), it should function properly.

You can use Samsung's Magician tool to check if TRIM is enabled.

The information you received from Samsung may be in reference to most RAID configurations not supporting TRIM.
 
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crypto1701

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RAID 0 can close to double throughput, it just doesn't help with seek times. Since SSDs have no seek time, it seems like RAID 0 would be the perfect companion for it (especially if you work with a lot of large files).



 
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