Re: Slightly OT: SSD question
On Fri, Jun 26, 2015 at 02:40:31PM +0200, Petter Adsen wrote:
> I know this isn't Debian-specific, but I hope someone can give me some
> useful information here anyway, or point me to a better place to ask.
>
> My SSD is dead, and I need a new one. Samsung seems to be a generally
> recommended brand, but according to
>
> https://github.com/torvalds/linux/blob/e64f638483a21105c7ce330d543fa1f1c35b5bc7/drivers/ata/libata-core.c#L4109-L4286
>
> the 850 EVO does not support queued TRIM. Is that a problem for
> everyday desktop use?
>
> The place I buy from has quite a limited amount of SSDs that fit what I
> need, the only alternatives they have are a Kingston (that I don't
> want) and a Crucial BX100 (that I know nothing about). Would the
> Crucial drive be a better choice for a Jessie install?
>
> If anyone has any real-life experience with either of those drives I'd
> be happy to hear about it.
If you use Wheezy or prior releases with the default kernel,
queued TRIM is not used at all. No problem.
If you use a 3.16 kernel (wheezy-backports, jessie default), you
should get a blacklist entry that stops the use of queued TRIM
on that drive.
You may have data corruption if you use it with a kernel that
both supports queued TRIM and does not blacklist your drive.
Queued TRIM is an extension of NCQ to the TRIM command and is
only a mildly attractive feature if it's working right.
-dsr-
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