28Gb Loss on 400Gb Drive from format? Sector Testing?

[IPEX computing]

Hi

I have just purchased a 400Gb HDD, unfortunalty refurbished, which the seller claims was fully tested.
After putting the Hard drive into my computer i noticed that that drive was only reading about 380928Mb which works out at 372Gb. I contacted the seller and he insists that the drive will loose a lof of space when formatted. I know quite a bit about computers and i have never come across a hard drive that looses 28Gb of space from a format. I know Hard drives are never exactly what they say but i thought that this was too much.
In case i am wrong here are the details of the Hard Drive.
SEAGATE 400gb Barracuda 7200rpm....8mb Cache

I would also like to carry out a Sector Test on the Drive. How do i go about this.

Cheers
James Davies
IPEX Computing

 

[Mictlantecuhtli]

It's just marketing. The storage device manufacturers sell kilobytes as 1000 bytes, megabytes as 1000000, gigabytes as 10^9. It makes the devices look bigger.

Computers count kilobytes as 1024 bytes, megabytes as 1,048,576 bytes, gigabytes as 1,073,741,824 bytes.

400 * 10^9 / 1,073,741,824 = 372.529 GB.

 

[Rick]

I would also like to carry out a Sector Test on the Drive. How do i go about this.

Here's a reasonably complete list of diagnostic utilities. Check out the Manufacturer diagnostics, all of which test sectors outside of Windows. (only good way to do it. )

https://www.techspot.com/vb/topic7602.html