How do you calculate Over Provisioning?

Let's say you have a 256 GB SSD, but the actual storage that is shown in Windows is 237 GB

Do you calculate 30% of 256 or 30% of 237?

educate teh meh pl34$3

MOD NOTE: MEMBER BANNED FOR SPAMMING!

 

Maybe this can help,

***USE Scientific View***

Convert drive to nominal capacity:
[ Inv ] 256 [ / ] 1.024 [ x3 ] [ = ] 238.4185791015625

Reserve 30% unallocated space:
238.4185791015625 [ * ] .30 [ = ] 71.52557373046875

Subtract reserved space from nominal capacity:
71.52557373046875 [ - ] 238.4185791015625 [ = ] -166.89300537109375

Strip negative, strip decimal:
-166.89300537109375 [ -+ ] [ Int ]

Create an exact partition size in GB's using MB's:
166 [ * ] 1024 [ = ] 169984 MB

169984 MB = 166 GB

Realized usable file space, including Windows OS share, after reserving ~ >30% unallocated space;
Creating a 166 GB OS partition leaves ~ >30% unallocated space remaining.

Calc History:

256 / cube(1.024)
238.4185791015625 * 0.3
71.52557373046875 - 238.4185791015625
Int(negate(-166.89300537109375)) * 1024
169984 / 1024

 

What????? I asked a simple quesion and need a simple answer! what is that?

Do I calculate 30% of the advertised capacity or the usable capacity?

 

I just showed you how to do it...

The calculation says to convert to nominal capacity FIRST!

Take what you want and leave what you don't want - ok?

 

The simple way to do it is:

When installing Windows with the custom option, remove all partitions (if the drive has any - whether it is an SSD or a HDD) to ensure proper alignment.

Now, select the unformatted drive and select New.

Put that number (it is how many MB's of capacity that specific drive has; at it may be different for the exact same model) into a calculator and multiply by 0.7; now, enter that number in the Windows setup and say 'yes' when it warns it may create additional partitions.

Done. Accurately.

 

Well, both answers will get you around the same end capacity after provisioning. Though perhaps the math in RCB's post flew over your head (it's a bit over the top, imo).

But yeah, to summarize RCB's and tiller's posts, the short answer is ~30% of the capacity remaining after the Windows install. Definitely do a clean install instead of a clone though, as it'll save you a lot of headache (and it's just cleaner, too).

 

Still not clear, calculate TOTAL CAPACITY (256 GB) x 0.7

OR

Available CAPACITY (237 GB) x0.7?

 

Available

10char

 

Re: How do you calculate Over Provisioning?

If details aren't needed then ignore them. If someone else benefits from more detail - it is there showing how much space should be remaining.

Of course you can use .70 (70%) and skip any additional steps - what is the difference if you want to calculate how much OP is remaining, same thing, subtraction. Click Click. Simple.

There it was displayed in all of its glory.

NBR must be an addiction.

***EDITED*** From nominal capacity. Windows accounts for all the bits in its form.

237GB (I get 238.41) You don't want the OS partition larger than 167GB (171008MB's).

 

I'm just curious, but how do you use Scientific View within NBR?

 

Nahhhh man. Crack, now that is an addiction. NBR is more like a religion. Praise Almighty Silicon. Thou shalt partition 30% of available space, so said the prophet tiller.

 

Maybe with the VR tech Facebook bought?

 

Nah, I'm not wearing one of those silly, heavy face masks

 

See post 5 - as each storage subsystem has different (specific) amounts of 'available capacity'. Just the nature of storage.

 

:thumbsup:

They're special goggles you acquire after x number of posts, didn't you get yours?

 

Back when I reached that post count, I was still an engineering student, so they only gave me the engineering version. enough of a difference to not be able to correctly render your text

 

Yes it is my intention to leave you all with a water bored'ed (intentionally mis-spelled) - headache.

***USE Scientific View*** (er, Mode from the View menu in Windows calculator)

Convert drive to nominal capacity:
[ Inv ] 256 [ / ] 1.024 [ x3 ] [ = ] 238.4185791015625

OS Partition 70% useable space:
238.4185791015625 [ * ] .70 [ = ] 166.89300537109375

Strip decimal:
166.89300537109375 [ -+ ]

Create an exact partition size in GB's using MB's:
166 [ * ] 1024 [ = ] 169984 MB

Remaining unallocated/unpartitioned space 30%:
238.4185791015625 [ - ] 166.89300537109375 [ = ] 71.52557373046875

Strip decimal:
71.52557373046875 [ Int ] 71 GB

Calc History:

256 / cube(1.024)
238.4185791015625 * 0.7
Int(166.89300537109375) * 1024 (166GB=169984MB)
238.4185791015625 [ - ] 166.89300537109375
Int(71.52557373046875) (=71GB)


The original way just works faster and easier for me. Whateva.