Message-ID: <519D8282.8000600@catalyst.net.nz>
Date: Thu, 23 May 2013 14:44:18 +1200
From: Mark Kirkwood <mark.kirkwood@catalyst.net.nz>
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To: Greg Smith <greg@2ndQuadrant.com>
CC: "Joshua D. Drake" <jd@commandprompt.com>,
	Merlin Moncure <mmoncure@gmail.com>,
	sthomas@optionshouse.com, Tomas Vondra <tv@fuzzy.cz>,
	pgsql-performance@postgresql.org
Subject: Re: Reliability with RAID 10 SSD and Streaming Replication
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	<519C0EFD.9080002@2ndQuadrant.com>
	<CAHyXU0ymFT7Sqw77yPryGWKEpjV4Wv9Vkc21vGtPKo0GZWGg8A@mail.gmail.com>
	<519CF8CC.1030204@optionshouse.com>
	<519D0921.9080807@2ndQuadrant.com>
	<519D174A.4050703@commandprompt.com>
	<519D1CD6.2080607@2ndQuadrant.com>
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	<519D2562.2060604@2ndQuadrant.com>
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	<519D49DC.7060406@commandprompt.com>
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On 23/05/13 14:26, Mark Kirkwood wrote:
> On 23/05/13 14:22, Greg Smith wrote:
>> On 5/22/13 10:04 PM, Mark Kirkwood wrote:
>>> Make that quite a few capacitors (top right corner):
>>> http://regmedia.co.uk/2013/05/07/m500_4.jpg
>>
>> There are some more shots and descriptions of the internals in the 
>> excellent review at 
>> http://techreport.com/review/24666/crucial-m500-ssd-reviewed
>>
>> That also highlights the big problem with this drive that's kept me 
>> from buying one so far:
>>
>> "Unlike rivals Intel and Samsung, Crucial doesn't provide utility 
>> software with a built-in health indicator. The M500's payload of 
>> SMART attributes doesn't contain any references to flash wear or 
>> bytes written, either. Several of the SMART attributes are labeled 
>> "Vendor-specific," but you'll need to guess what they track and read 
>> the associated values using third-party software."
>>
>> That's a serious problem for most business use of this sort of drive.
>>
>
> Agreed - I was thinking the same thing!
>
>

Having said that, there does seem to be a wear leveling counter in its 
SMART attributes - but, yes - I'd like to see indicators more similar 
the level of detail that Intel provides.

Cheers

Mark


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