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Intel adding TRIM support for SSDs in RAID 0 with RST 11.5

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On November 22, 2011, 3:00 PM

Windows 7 and Intel's RST (Rapid Storage Technology) have supported TRIM for quite a while, but this support has always excluded solid-state drives in RAID configurations. Fortunately for owners of multiple SSDs who want to put all their precious GBs to use that may change soon, as the TRIM feature will reportedly be enabled for RAID 0 setups in an upcoming RST 11.5 driver release.

Currently the only way for TRIM to function on an SSD is to operate in AHCI mode. Last year users were led to believe that the Intel RST 9.6 drivers would add TRIM support in RAID volumes, but Intel later clarified that it was only for SSDs acting as single drives in AHCI mode alongside a separate array attached to the same Intel storage controller -- but not if the SSD was part of a RAID volume.

The benefits of TRIM are obvious because the write performance of an SSD significantly degrades with time or as the drive fills out without a feature to properly handle garbage collection overhead. This means that SSDs in high-performance RAID 0 arrays could eventually see the increased read/write speeds neglected.

Intel RST 11.5 is not expected to arrive until sometime in Q2 2012 with support for Windows 7 and Windows 8 systems. For a more detailed explanation on TRIM, take a look at AnandTech's SSD Anthology article.

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User Comments: 5

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  1. "Currently the only way for TRIM to function on an SSD is to operate in AHCI mode."

    Not true. I can switch my p67's board to IDE and check that TRIM is still enabled.

  2. "Currently the only way for TRIM to function on an SSD is to operate in AHCI mode."

    Not true. I can switch my p67's board to IDE and check that TRIM is still enabled.

    Enabled and functioning are not the same thing.

  3. Finally. So dumb how it's not supported for RAID

  4. "The benefits of TRIM are obvious because the write performance of an SSD significantly degrades with time"

    well that sucks considering most SSDs are over a dollar per Gig

  5. The benefits of TRIM are obvious because the write performance of an SSD significantly degrades with time

    Most SSDs have garbage collection which has the same effect on recovering performance. It's just not realtime like TRIM.

    Enabled and functioning are not the same thing.

    True. Looking at the OCZ forums, a few report TRIM working on IDE. I'm still skeptical because their evidence is benchmark based.

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