Date: Thu, 20 Feb 2014 14:23:04 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Tom Evans" <tevans.uk@googlemail.com>, "Willem Jan Withagen" <wjw@digiware.nl> Cc: fs@freebsd.org Subject: Re: What types of SSDs to use..... Message-ID: <65C4D81622BE4331A9DD9FE2A293B303@multiplay.co.uk> References: <5305F8B0.1060308@digiware.nl> <783388CA2911497B98479F1187F49915@multiplay.co.uk> <53060C89.8040500@digiware.nl> <CAFHbX1KedURiD_XQVixJQREkvVQzJ=XMrTGmaaGiCSE5d__GDA@mail.gmail.com>
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----- Original Message -----
From: "Tom Evans" <tevans.uk@googlemail.com>
To: "Willem Jan Withagen" <wjw@digiware.nl>
Cc: <fs@freebsd.org>
Sent: Thursday, February 20, 2014 2:19 PM
Subject: Re: What types of SSDs to use.....
> On Thu, Feb 20, 2014 at 2:09 PM, Willem Jan Withagen <wjw@digiware.nl> wrote:
>> On 20-2-2014 14:06, Steven Hartland wrote:
>>> The "disconnect" issue is generally related to Sandforce based devices.
>>>
>>> Its a lot better on later devices / firmware and does depend on the
>>> controller / MB they are connected to.
>>
>> Any easy way to detect these? Or is it just a matter of reading the
>> specsheets? Hoping that the controller chipset is mentioned.
>>
>
> You can tell the old (SF-2000) chipset devices from their advertised
> read and write speeds - read will be 500+MBs, write will be
> 200-300MBs. This is because the "read speed" assumes you will be
> reading compressible data.
>
> I would avoid SF based drives if you can, I have had horrific
> experiences with OCZ Vertex 4 SSDs where they basically lock up if you
> do non-sequential access. Having said that, there are two parts to it,
> the controller and the firmware running on the controller; Intel SSDs
> using SF controllers, like the Intel 530, don't have such a bad
> reputation.
>
> Looking on wikipedia or tech review sites for a specific SSD should
> let you know what controller it uses, if it is not listed in the tech
> specs. I replaced my OCZ drives with Crucial M4, which use a Marvell
> controller.
OCZ avoid the older like the plage they are very unreliable, Crucial M4's
have very slow for TRIM so would avoid them on that basis.
In terms of manufactures, both Kingston and Corsair have very good support.
Regards
Steve
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