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CSHawkeye81

macrumors member
Original poster
Jun 30, 2009
87
0
Arlington VA
Just getting a new Macbook Pro 15 inch from work and it will have a 256gb SSD in it. Wanted to know who they are using? Also how much space is actually available?? 250?? 240??
 
They used Samsung but I think it's Toshiba now. No it's not full 256GB. Formatting takes space + OS, maybe 240GB with OS X
 
With wear levelling it usually takes a few GB off of user access to replace worn cells.

32GB = 30GB (2gb for cell replacement)
64GB = 60GB (4gb for cell replacement)
128GB = 120GB (8GB for cell replacement)
256GB = 250GB (6GB for cell replacement)

My X25-E 64GB read 59.6GB before I formatted it to install OS X.

After it showed 59.6GB (same amount, so 4GB approx is used for wear levelling).

After installing OS X I have this: 43.04GB available. OS X took around 10-15GB and a few extra's here and there (updates) took the rest.
 
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