Q: difference between ssd over-provisioning and simply not using space?

venm11

2[H]4U
Joined
Oct 6, 2004
Messages
2,236
On an SSD, is there any difference between:

1. partitioning your drive with 10% less space
2. using the mfr's over-provisioning tool to block off 10% space
3. keeping 10% space free for the life of the ssd
 

DrNick

Limp Gawd
Joined
Jul 19, 2006
Messages
276
Not sure about 1 but 2 and 3 make no difference. Also depending on the ssd capacity 10% can be a bit much as well.
 

jwcalla

2[H]4U
Joined
Jan 19, 2011
Messages
3,628
In terms of performance and longevity there is probably no difference.
 

fantabulous

Limp Gawd
Joined
Jan 2, 2013
Messages
229
1 and 3 are essentially the same thing, assuming TRIM in both cases to explicitly mark the blocks as free. Assuming the controller support dynamic overprovisioning (using the extra free pages that aren't explicitly reserved for overprovisioning), the extra free space can be used as such while it's available. The partitioning method is used as either a "set it and forget it" safeguard against 100% full, or for situations where TRIM isn't available.

IIRC most modern SSDs support dynamic overprovisioning now. I'm also glossing a bit over some of the nuances, but this should be good enough.
 
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