Disk size Difference ?? WHY ??

[datarikaviri]

Hello I have a drive which I am testing. I have formatted it and examined in FTK Imager. And partition size seems 156.297.216 sector length. But when I click properties on Windows it says disk size is 80.024.170.496 byte (156.297.208 sector) size. Where comes this 8 sector difference. I think this area is for partition boot code and OS doesnT show this area to user. What is the reason actually?

[fzabkar]

The IDEMA standard specifies the LBA count as ...

LBA count = (97,696,368) + (1,953,504 * (Advertised Capacity in GBytes – 50))

So ...

(97,696,368) + (1,953,504 * (80 – 50)) = 156,301,488 LBAs

That's a difference of 4272 sectors. I suspect that the formatter terminated the partition on a [logical] cylinder boundary.

Could we see the partition table (sector 0) and the volume boot sector?

[lcoughey]

I suspect that the 8 sector difference is because the drive uses AF 4K sectors. The higher number is the number of sectors available while the lower number is the maximum sector number.

[fzabkar]

The OP isn't clear, but AIUI the drive is an 80GB model, in which case it predates AF.

[lcoughey]

True. Then it makes no sense at all.

[datarikaviri]

Hello again

Drive LBA Count is: 156301488 (like fzabkar said)
I have formatted disk and there is just one partition. And when I look at the first sector on FTK Imager it says partition begins at sector 2048 and it is 156297216 sector length.

But when I look at the properties of drive on windows it says 80024170496 byte which equals to 156297208 sector.

I send screenshots. So why there is difference between FTK and windows?

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