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April 2015

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Sender:
Mailing list for Scientific Linux users worldwide <[log in to unmask]>
Date:
Sat, 11 Apr 2015 11:03:48 -0700
Reply-To:
Brandon Vincent <[log in to unmask]>
Subject:
Re: need SSD RAID controller advice
From:
Brandon Vincent <[log in to unmask]>
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<[log in to unmask]>
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To: Vladimir Mosgalin <[log in to unmask]> cc: [log in to unmask]
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On Sat, Apr 11, 2015 at 4:18 AM, Vladimir Mosgalin
<[log in to unmask]> wrote:
> Otherwise you're going to live with eventual performance degradation,
> because hardware controllers (at least LSI and Adaptec) do not support
> TRIM for drives in RAID.

This is not correct. LSI SAS2008 I/O controllers do support TRIM with
drives that support both deterministic trim (DRAT) and deterministic
read zero after trim (DZAT).

The mpt2sas kernel driver will not enable TRIM if DZAT is unavailable
(which some drives with DRAT lack), so researching the drive you wish
to purchase and the I/O controller is a must.

Brandon Vincent

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