A 1 TB drive has only 931 MB usable.
That's very close to 7%.
The usable capacity of an 80 GB Intel SSD is 74.5 GB.
That is also very close to 7%.
The question is:
What is the source of the differential in the case of Intel SSDs--overprovisioning or the well-known decimal/binary reason as on 1 TB/931 MB drives?
I think it is the other way around. An 80GB (decimal) disk shows as 74.5GB (binary) on the screen. There you have your 7% difference.Aha!!!
So, by inference, an 80 GB Intel SSD is actually 88 GB?
The 7% decimal/binary differential does not apply, at least to Intel SSDs?
I am talking about the decimal to binary effect. Each decimal capacity number on the box or in ads will show 7% less (in the GB range) when you see it in the system - because all nums in the system are in binary.If I knew what you were talking about here then I could answer maybe.???
Total confusion reigns - LOL
Divide 100 billion (100GB in decimal) three times by 1024 and see what you get.
The first one to figure it out wins the Speedy Gonzales prize.
The difference being referred to is the reason a 1TB hard drive gives 931GB of useable space. But, AFAIK, all SSD manufacturers over provision SSDs for maintenance and nand replacement.
If you look at the bottom right NAND chip it is a different part number. Still can't find my list as usual.
So it isn't a straight 10x ? =80GB
One chip is used with the controller only for wear leveling and "Raid type parity".
Quotes are what Intel calls it I'm pretty sure.
So that takes one and the other 9 are storage.
You got close. Shift the comma one position to the right since you started with 10 billion and not 100 billion.Well, I get 9.5367431.
You better put new batteries into your calculator. LOLI get 74.505
Anandtech quote for 300GB. > AnandTech - The Intel SSD 320 Review: 25nm G3 is Finally HereIntel sent a 300GB version of the 320 for us to take a look at. Internally the drive has 20 physical NAND devices. Each NAND device is 16GB in size and features two 64Gbit 25nm 2-bit MLC NAND die. That works out to be 320GB of NAND for a drive whose rated capacity is 300GB. In Windows you'll see ~279GB of free space, which leaves 12.8% of the total NAND capacity as spare area
The I-29F16 is 16GB. New numbering system.
The I-29F64 is 8GB. Old number system exact same chip as X-25.
So one 16GB + 8x8GB = 80GB storage.
1 8GB is used with the controller as explained in my above post.
I had to figure it out from scratch since I couldn't find my list.
The difference is over provisioning. This isn't an HDD.
Read the anandtech page I posted above explaining the OP.
