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Windows 7: Show us your SSD performance

19 Dec 2011   #2441
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

Quote   Quote: Originally Posted by whs View Post
Am I fighting the wrong war here.
Absolutely not.

I know that an 80 GB Intel SSD shows as about 93% of that: 74.5.

We know from Anandtech that a 300 GB Intel SSD shows as about 93% of that: 279 GB.

I think Hoppy said his 120 GB Intel showed as 111 plus in Windows; about 93%.

What about other Intel SSD sizes?

Do all other Intel SSD sizes happen to show as 93% of stated capacity in Windows?

Is it merely a coincidence that Intel allots 7% of advertised space for over-partitioning?

I have no idea.


My System SpecsSystem Spec
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19 Dec 2011   #2442
essenbe

Windows 10 Pro/ Windows 10 Pro Insider
 
 

As I understand it, all SSD manufacturers over provision their SSDs. That is why wear leveling and Replacing bad nand cells comes from. There are nand cells on the SSD that are not accessible to the user.
My System SpecsSystem Spec
19 Dec 2011   #2443
Hopalong X

Windows7 Pro 64bit SP-1; Windows XP Pro 32bit
 
 

Exactly Essenbe.

Intel must have figured about 7% is the sweet spot for their drives.

Other brands do vary slightly.
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19 Dec 2011   #2444
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by essenbe View Post
As I understand it, all SSD manufacturers over provision their SSDs. That is why wear leveling and Replacing bad nand cells comes from. There are nand cells on the SSD that are not accessible to the user.
Steve, that is correct - but that is another matter. The other discussion we had was a matter of pure mathematics (Decimal vs Binary)
My System SpecsSystem Spec
19 Dec 2011   #2445
Hopalong X

Windows7 Pro 64bit SP-1; Windows XP Pro 32bit
 
 

Oh well.

Good conversation while it lasted.
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19 Dec 2011   #2446
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

111.79 x 1.024 x 1.024 x 1.024 = 120.033


111.79/120.033 = .9313272

1 - .9313272 = .0686728

.0686728 x 100 = 6.86728%

A coincidence?
My System SpecsSystem Spec
20 Dec 2011   #2447
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Read the 1st 2 paragraphs in this pdf file from Intel

http://cache-www.intel.com/cd/00/00/...555_459555.pdf

Quote:
The performance benefits of over-provisioning are most
relevant to the Intel® X25-M SSD because the SSD already has
a larger spare area set by design. For this MLC device, which is
architected with 7% spare area, increasing the spare area can
boost performance by 10% or more depending on the amount
of spare area assigned
A Guy
My System SpecsSystem Spec
20 Dec 2011   #2448
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by A Guy View Post
Read the 1st 2 paragraphs in this pdf file from Intel

http://cache-www.intel.com/cd/00/00/...555_459555.pdf

Quote:
The performance benefits of over-provisioning are most
relevant to the Intel® X25-M SSD because the SSD already has
a larger spare area set by design. For this MLC device, which is
architected with 7% spare area, increasing the spare area can
boost performance by 10% or more depending on the amount
of spare area assigned
A Guy
Bill, I am a bit lost. What is this quote telling me - other than that they set sufficient spare area aside.

Does that mean that there is no need to leave extra unallocated space on the X25?
My System SpecsSystem Spec
20 Dec 2011   #2449
Snakeyeskm

Win 7 64 bit professional
 
 

whs I have a few Intel drives and a little extra OP(10% plus) has always helped. The toolbox helps in establishing the trim command, but the OP is really where the SSD executes the sub-processes that clear the blocks identified by the trim command. The extra OP can always be recovered by expanding the partition but there is a catch 22. Unfortunately SSD drives that out over 80% full tend to operate in the "mapped" steady-state and under heavy usage (read/write/delete) will frequently enter the "hammered" state.
My System SpecsSystem Spec
21 Dec 2011   #2450
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Quote   Quote: Originally Posted by whs View Post
Quote   Quote: Originally Posted by A Guy View Post
Read the 1st 2 paragraphs in this pdf file from Intel

http://cache-www.intel.com/cd/00/00/...555_459555.pdf

Quote:
The performance benefits of over-provisioning are most
relevant to the Intel® X25-M SSD because the SSD already has
a larger spare area set by design. For this MLC device, which is
architected with 7% spare area, increasing the spare area can
boost performance by 10% or more depending on the amount
of spare area assigned
A Guy
Bill, I am a bit lost. What is this quote telling me - other than that they set sufficient spare area aside.

Does that mean that there is no need to leave extra unallocated space on the X25?
It confirms the 7% number for OP that was mentioned, and people were questioning if that was binary to decimal ad nauseum

A Guy
My System SpecsSystem Spec
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