Re: TRIM support for ext4

[Floris Bos / Maxnet <bos@je-eigen-domein.nl>]

On 03/12/2012 07:51 AM, Joey Hess wrote:
> Floris Bos / Maxnet wrote:
> > In addition to that, it would also be nice if the "-E discard"
> > option is passed to mkfs.ext4, so that it TRIMs the entire disk
> > partition prior to creating the file system structures.
> -E discard is the default, according to mkfs.ext4(8)

Not the most clear man page...
On the (Ubuntu) version I have on my desktop, it also says nodiscard is 
the default?!


==
discard
Attempt to discard blocks at mkfs time (discarding blocks initially is 
useful on solid
state devices and sparse / thin-provisioned storage). When the device 
advertises that dis‐
card also zeroes data (any subsequent read after the discard and before 
write returns
zero), then mark all not-yet-zeroed inode tables as zeroed. This 
significantly speeds up
filesystem initialization. This is set as default.

nodiscard
Do not attempt to discard blocks at mkfs time. This is the default.
==

--
Yours sincerely,

Floris Bos