3 ms·

Actually, according to HD manufacturers, 0.5 TiB is roughly equal to 465.66 GB. That's a difference of almost 50GB.

by windsurfer 16y ago

alanh 16y ago
I could be wrong but I think SSDs tend to come in actual powers of two, or genuine 500GB
- moe 16y ago
  SSDs have their own ways to shrink the physical capacity. For example the new SandForce chipsets needed 20%(!) of the flash-capacity for their scratch space when they were initially released. I think they have that down to around 6% now. However, regardless of the figures, the harddrive vendors have a user-base that was trained for decades that harddrives are supposed to be smaller than advertised. I doubt they will stop taking advantage of that.
  - icegreentea 16y ago
    It's not just scratch. It's also spare capacity and stuff to deal with level wearing. They also advertise the actual usable space as opposed to the 'max' space. A SSD might actually have 256GB of space, but it'll be advertised as 240GB. They're actually fairly honest. Remember, most of the major SSD manufacturers -aren't- harddrive manufacturers. They're chip and memory manufacturers (which makes sense).
- Bud 16y ago
  "Actual powers of two" would imply 512 GB.
ghshephard 16y ago
According to everyone _except_ memory manufacturers, 1/2 Terabyte = 500 Gigabytes = 5*10^11 Bytes. See: http://www.tarsnap.com/GB-why.html http://www.tarsnap.com/GB-why.html I can't find a single other example, other than Memory where "Giga" isn't 10^9. The question is - SSDs - Memory or Disk? :-) See: http://www.bit-tech.net/hardware/storage/2010/06/25/sandforce-ssd-test/2 http://www.bit-tech.net/hardware/storage/2010/06/25/sandforc... In addition to the GB vs GiB, the use of NAND disk over-provisioning and partition formatting further complicates issues - the punchline: "The 100GB SandForce-based drives use a massive 28 per cent of over provisioning, leaving just 93.16GB of formatted capacity despite their 128GiB of NAND storage"
deleted 16y ago
[deleted]

Actually, according to HD manufacturers, 0.5 TiB is roughly equal to 465.66 GB. That's a difference of almost 50GB.

alanh 16y ago

I could be wrong but I think SSDs tend to come in actual powers of two, or genuine 500GB

moe 16y ago
SSDs have their own ways to shrink the physical capacity. For example the new SandForce chipsets needed 20%(!) of the flash-capacity for their scratch space when they were initially released. I think they have that down to around 6% now. However, regardless of the figures, the harddrive vendors have a user-base that was trained for decades that harddrives are supposed to be smaller than advertised. I doubt they will stop taking advantage of that.
- icegreentea 16y ago
  It's not just scratch. It's also spare capacity and stuff to deal with level wearing. They also advertise the actual usable space as opposed to the 'max' space. A SSD might actually have 256GB of space, but it'll be advertised as 240GB. They're actually fairly honest. Remember, most of the major SSD manufacturers -aren't- harddrive manufacturers. They're chip and memory manufacturers (which makes sense).
Bud 16y ago
"Actual powers of two" would imply 512 GB.

ghshephard 16y ago

According to everyone _except_ memory manufacturers, 1/2 Terabyte = 500 Gigabytes = 5*10^11 Bytes. See: http://www.tarsnap.com/GB-why.html http://www.tarsnap.com/GB-why.html I can't find a single other example, other than Memory where "Giga" isn't 10^9. The question is - SSDs - Memory or Disk? :-) See: http://www.bit-tech.net/hardware/storage/2010/06/25/sandforce-ssd-test/2 http://www.bit-tech.net/hardware/storage/2010/06/25/sandforc... In addition to the GB vs GiB, the use of NAND disk over-provisioning and partition formatting further complicates issues - the punchline: "The 100GB SandForce-based drives use a massive 28 per cent of over provisioning, leaving just 93.16GB of formatted capacity despite their 128GiB of NAND storage"

deleted 16y ago

[deleted]