Samsung SM863 missing space?

[Wasmachineman_NL]

I know that all storage devices have overhead, but 800GB usable of a 960GB SSD seems excessive? My 1TB 860 Evo has 931GB usable as a example.

Wat do?

 

[EffrafaxOfWug]

Welcome to the wonderful world of Marketing Mathematics and the fact that hard drive manufacturers wanted to use base 10 units rather than base 2. It didn't make much of a difference back when storage was titchy, but as drives have gotten bigger the discrepancy has become more and more obvious.

1000GB == 931GiB
1TiB == 1100GB

 

[BoredSysadmin]

even with 1000 vs 1024, it only makes 800GB to 840GiB, still seems excessive variance.

 

[EffrafaxOfWug]

Ah sorry I misread the post, didn't realise they were talking about two drives here.

Yes, a 960GB drive should have 894GiB usable. What model drive is it and what does the partition table look like?

 

[Wasmachineman_NL]

Ah sorry I misread the post, didn't realise they were talking about two drives here.

Yes, a 960GB drive should have 894GiB usable. What model drive is it and what does the partition table look like?

Only a single partition with 800GB capacity, I checked it with disk management in Win7 and GParted under SUSE.

No overprovisioning according to Samsung DC Toolkit either!

 

[EffrafaxOfWug]

Do the start and and sectors of the partition agree with the drive geometry? I'm not sure how you see that sort of thing in windows but parted or fdisk will both show it with the print command.

 

[Wasmachineman_NL]

Do the start and and sectors of the partition agree with the drive geometry? I'm not sure how you see that sort of thing in windows but parted or fdisk will both show it with the print command.

I'll take a look later.

 

[Wasmachineman_NL]

Strangely enough, another SM863 960GB I bought has 894GB usable?

 

[marv]

I am not familiar with Samsung DC Toolkit, but I check overprovisioning with command

hdparm -N /dev/sda

I bought 600GB Intel SSD which showed capacity 480GB and yeah it was overprovisioned too.

 

[Wasmachineman_NL]

I am not familiar with Samsung DC Toolkit, but I check overprovisioning with command

hdparm -N /dev/sda

I bought 600GB Intel SSD which showed capacity 480GB and yeah it was overprovisioned too.

Looks like i'll have to put that SM863 in my parts M6500 and install Loonix? Will do later.

EDIT: I'm in Knoppix right now, hdparm is saying this about my SM863: 1677721601/1875385008

What does that mean, overprovisioning in effect?

EDIT 2: Wrong geometry, fixed it with setmax and it's now showing the entire 894GB.