F15 ext4 discard option - why not default?

Jeff Moyer jmoyer at redhat.com
Wed Mar 16 18:27:40 UTC 2011

Michał Piotrowski <mkkp4x4 at gmail.com> writes:

> W dniu 16 marca 2011 18:55 użytkownik Ric Wheeler <rwheeler at redhat.com> napisał:
>> On 03/16/2011 01:53 PM, Michał Piotrowski wrote:
>>> Hi,
>>> I installed F15 on SSD and I noticed that file systems are not mounted
>>> with discard option.
>>> Shouldn't "discard" option be enabled by default for SSD devices?
>> No - discard is off on purpose. Some SSD's work very well, others have
>> performance issues with discard and some even became unusable bricks.
>> The idea is to have it off by default so people can test. Over time, if
>> things go well, we can think about changing the default.
> Ok, thanks for your answer

Out of curiosity, what SSD do you have?


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