SSD Partitioning OP/Trim recommendations
Robert Moskowitz
rgm at htt-consult.com
Wed Dec 18 18:50:01 UTC 2013
On 12/18/2013 01:32 PM, Chris Murphy wrote:
>
> On Dec 18, 2013, at 6:03 AM, Robert Moskowitz <rgm at htt-consult.com
> <mailto:rgm at htt-consult.com>> wrote:
>
>>
>> On 12/18/2013 04:41 AM, John Obaterspok wrote:
>>> Hello,
>>>
>>> I'm going to setup F20 with a new SSD disk (256gb Samsung 840 PRO)
>>> and was wondering about best practices for Over Provisioning during
>>> partitioning.
>>
>> hmmm. I just ordered a Crucial M500 256GB SSD for my new install. I
>> thought I would have it all to work with (currently using a 320GB HD,
>> so that is a 64GB reduction already). Are you implying here that you
>> need to not use all of the SSD drive so that it has some swap around?
>>
>> I chose the M500 over the 840 based on price and reviews. The M500
>> uses MLC NAND compared to the 840 using TLC NAND.
>
> FYI, be aware there appears to be a queued TRIM bug with the M500
> where it may be causing silent data corruption. I wouldn't use discard
> on this, or any, SSD, in production until it's been well tested.
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1024002
Seems like a workaround was posted yesterday? So since I am still
waiting for the drive to show up on my porch...
> Until the industry gets its act together on TRIM, I think we're
> probably better off executing fstrim once a week with a cron job at a
> time the computer is likely to be idle.
And what is TRIM and fstrim?
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