In a nutshell, TRIM spatially distributes writes across an SSD's memory so no 
particular spot of memory gets unduly utilized by writes and consequently 
"dies" or becomes slow due to soft (correctable) errors, which indicates the 
beginning of memory death.

Apple enables TRIM for all of its own SSD drives. For 3rd-party drives, you 
have to do it yourself. There are free apps like Trim Enabler that are very 
easy to use. 

-Carl


On Jan 14, 2014, at 7:43 PM, "Dinse, Gregg (NIH/NIEHS) [V]" 
<[email protected]> wrote:

> Thanks for the suggestion, though I don’t know what TRIM is or which disk 
> utilization patterns would indicate that I should enable it.  Can you provide 
> any details?
> 
> Thanks,
> 
> Gregg
> 
> On Jan 14, 2014, at 9:37 PM, Carl Hoefs <[email protected]> 
> wrote:
> 
>> On Jan 14, 2014, at 7:30 PM, "Dinse, Gregg (NIH/NIEHS) [V]" 
>> <[email protected]> wrote:
>> 
>>> And although the system does not feel slower with the SSD than with my old 
>>> HDD, it also does not feel remarkably faster either, though I’m sure some 
>>> things are at least somewhat faster.
>> 
>> Depending on your disk utilisation patterns, you might want to enable TRIM 
>> on the SSD.
>> 
>> -Carl
> 

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