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Windows 7: I Am Tyin' To Chill

12 Feb 2011   #1

win 7 X64 Ultimate SP1
 
 
I Am Tyin' To Chill

This may not be a good post but it is to those of you that are about to buy an SSD.

I recently purchased two OCZSSD2-2VTXE120G 2.5" 120Gig OCZ Verte3x 2 Drives. Once installed the size is reported at 107.13 Gig.
Thats a loss of 12.87 Gigs. That is 10.725% less than advertised.
I am accustomed to drives being less than the size printed on the device. But don't you think 10% is a little steep.
The following is a quote from their web site concerning the ssd's:
Consumers may see a discrepancy between reported capacity and actual capacity; the storage industry standard is to display capacity in decimal. However, the operating system usually calculates capacity in binary format, causing traditional HDD and SSD to show a lower capacity in Windows. In the case of SSDs, some of the capacity is reserved for formatting and redundancy for wear leveling.
Going from 120 Gig decimal to "binary" (1028?) would mean a loss of 3.36 Gig. That I would understand. The link in this post is to a news blivot that indicateds to me there has been some dissatisfaction with these drives. They are offering a remedy which a lot of people will not bother with.
I Think I have been had. Maybe not. But I have got that feeling.

OCZ Forum - New update on the 25nm OCZ SSD drives

Read all of this News posting.
My System SpecsSystem Spec
12 Feb 2011   #2
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

In the GB range the difference is 7%. 100GB decimal equal 93GB binary . it is 100Billion bytes in both cases. But where you lost the other 3% beats me. My 2 months old Vertex 2 of 90GB shows up as 83.7 GB which exactly the 7% difference.
My System SpecsSystem Spec
13 Feb 2011   #3

Main - Windows 7 Pro SP1 64-Bit; 2nd - Windows Server 2008 R2
 
 

SSDs reserve extra space for over provisioning:
Quote:
Over-provisioning essentially refers to “spare area” that is reserved for background operations that are fundamental to the drive’s performance. NAND natively has around 6 percent over-provisioning built in, so as SSD capacity goes up so does the corresponding percentage of over-provisioning. This increase in “spare area” results in greater performance in the larger capacity drives.
Second-to-last paragraph here:

Micron Innovations Blog » The 64GB RealSSD

Some manufacturers play it a little loose when reporting capacity. I guess their rational is that the drive is using it, even if you can't. I know some of the seemingly odd sizes you see (60GB, 100GB, etc) are due to that particular manufacturer being a little more forthright about it.
My System SpecsSystem Spec
13 Feb 2011   #4

win 7 X64 Ultimate SP1
 
 
OK

I guess I need to quit whining. It just seemed like a lot of space to me.
My System SpecsSystem Spec
13 Feb 2011   #5
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Yeah, the overprovisioning is there, but it should not show up as missing space from the specified capacity. Your disk should show as 111.6GB binary. Why it shows only as 107.13 beats me.

Check in another place. Type system into Start/Search and hit Enter. Then open Components > Storage > Disks and see what it says there.
My System SpecsSystem Spec
13 Feb 2011   #6

win 7 X64 Ultimate SP1
 
 
Win Sys Info

Win sys information lists them as 107.3. Western Dig tools says 115.
My System SpecsSystem Spec
13 Feb 2011   #7

win 7 X64 Ultimate SP1
 
 
Info

Let me add some info that may be relevant and may not be.
When I set the disks up I plugged them into an external dock and booted with a Acronis 2011 disk. I did not format them. I cloned the OS disk and the other disk. Since it worked I reasoned the format was taken care of by Acronis. I then shut down and installed the disks. Everything worked with out a hitch.
My System SpecsSystem Spec
13 Feb 2011   #8
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

There is still something wrong. Did you align the disk before you cloned the OS? Check the alignment: SSD Alignment
My System SpecsSystem Spec
13 Feb 2011   #9

win 7 X64 Ultimate SP1
 
 
Alignment

The large partition was 1024. The reserved partition was 101 which is not divisible by 4. I'll do some fresh back ups and work on the alignment.

Later
My System SpecsSystem Spec
13 Feb 2011   #10

Windows 7 Ultimate SP1 (64-bit)
 
 

Actually, if you multiply 101 by 1024, it'll give you 103424, if you divide that by 4, that's 25856

The SSD is aligned
My System SpecsSystem Spec
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