TRIM or no TRIM?

[Steven Hartland]

----- Original Message ----- 
From: "Karl Pielorz" <kpielorz_lst at tdx.co.uk>
> --On 24 July 2013 11:07 +0100 Steven Hartland <killing at multiplay.co.uk> 
> wrote:
> 
>> 9.1 is a bit old, 9.2-BETA1 or 9/stable will be able to tell you if
>> indeed your SSD is reporting TRIM via:
>> camcontrol identify <disk>
> 
> 'bit old'? - if only freebsd-update handled updating to 'stable' (unless it 
> does?).
> 
> Anyway, the camcontrol runs on this ancient 9.1 system ;) and shows:
> 
> "
>  data set management (TRIM)     yes
> "
> 
> So it is supported by the drive - remembering the file system is mounted 
> from '/dev/raid/r0' - i.e. not the actual underlying drive). But everything 
> I've seen about geom etc. indicates on this version is should support 
> 'trim' - it may well even be using it, but with the warning logged about 
> 'disk does not confirm that it supports trim' - I'd rather be sure...

I'm guessing that the software raid your using doesn't support TRIM then

Have you considered switching to ZFS based install, which does support
TRIM in 9.2, 9/stable and 8/stable?

    Regards
    Steve

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