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Windows 7: Defragging Solid State Drives?


17 Jan 2012   #1

Windows 7 Home Premium SP1 64-bit
 
 
Defragging Solid State Drives?

This isn't recommended, I know. But would it serve any purpose at all? As far as I understand the matter, aside from the wear and tear issue, whether an SDD is 0% fragmented or 100% fragmented makes no difference to the performance, due to the way the information is read from the disc. Is that so?

I run MS Flight Simulator from an SDD (my O/S is on another SDD too) and I am starting to get some performance issues. Some have recommended I defrag the disc - when I analyse it, it shows 100% fragmentation, but if what I wrote above is true, it wouldn't make any difference. Right??

Thanks,

Martin

My System SpecsSystem Spec
.

17 Jan 2012   #2
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

I think it would be a useless exercise. Your perceived performance degradation must have other causes.
My System SpecsSystem Spec
17 Jan 2012   #3

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

+1 WHS

If you can check the defrag amount on your SSD that means Defrag is not disabled on your system.
It should be disabled.

The defragger will never actually achieve defragmenting your drive. After it is done running the SSD will eventually move all the files again as it uses its wear leveling.
Wear leveling makes sure all NAND cells get equal usage.
Your files do not "sit" in one location after install as they do on an HDD/spinner.

So let the SSD write the files where it wants and do its job of wear leveling and clean up as designed by the SSD firmware.
No defrag.

Mike
My System SpecsSystem Spec
.


18 Jan 2012   #4

Windows 7 Home Premium 64bit
 
 

Quote   Quote: Originally Posted by Hopalong X View Post
...Defragging on an HDD makes it easier for the optic laser to find files by putting the ones that are related near each other...
Please show me an HDD that has an "optic laser". You won't be able to, because there is none. It's magnetic, not optical. CD's & DVD's are optical.

BTW, access time specs for SDD's are in the 0.1ms range which is about 1/100 that of a HDD.
My System SpecsSystem Spec
18 Jan 2012   #5

ultimate 64 sp1
 
 

Quote   Quote: Originally Posted by Hopalong X View Post
...

If you can check the defrag amount on your SSD that means Defrag is not disabled on your system.
It should be disabled.

...
sorry hoppy, but i'm not sure if this is 100% accurate either.

you can still run the defrag program, to analyse without actually defragging. what you need to disable is scheduled defrags on the SSD - most people that have ssd's also have an hdd or two, so they may still wish to defrag the hard disks.
My System SpecsSystem Spec
18 Jan 2012   #6

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

Quote   Quote: Originally Posted by Comp Cmndo View Post
Quote   Quote: Originally Posted by Hopalong X View Post
...Defragging on an HDD makes it easier for the optic laser to find files by putting the ones that are related near each other...
Please show me an HDD that has an "optic laser". You won't be able to, because there is none. It's magnetic, not optical. CD's & DVD's are optical.

BTW, access time specs for SDD's are in the 0.1ms range which is about 1/100 that of a HDD.
Sorry about that.
It was late when I posted that and I will edit.

You understand my point the reduced read access time of the SSD.
My System SpecsSystem Spec
18 Jan 2012   #7

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

Quote   Quote: Originally Posted by mickey megabyte View Post
Quote   Quote: Originally Posted by Hopalong X View Post
...

If you can check the defrag amount on your SSD that means Defrag is not disabled on your system.
It should be disabled.

...
sorry hoppy, but i'm not sure if this is 100% accurate either.

you can still run the defrag program, to analyse without actually defragging. what you need to disable is scheduled defrags on the SSD - most people have ssd's and an hdd or two, so they may still wish to defrag the hard disks.
Then it isn't disabled on the SSD.
Mine is set per what is in black inside the quotes.
I highlighted in red how to set if you need to defrag other HDD's/spinners from the SSD.

WHS's tutorial here on the forum.
SSD - Install and Transfer the Operating System

Quote:
Settings after the OS transfer

Disk Defragmentation makes no sense on an SSD. For a laptop, go into Services, navigate to Disk Defragmenter, right click on it and go to Properties. Here you set the service to Disabled.
For a desktop, you may want to disable defrag in the Disk Defragmenter and only for the SSD so that the remaining HDDs can still be defragmented.


My System SpecsSystem Spec
19 Jan 2012   #8

Windows 7 Home Premium SP1 64-bit
 
 

Thanks for the replies. I keep a defrag programme as I have two 1TB SATA drives in addition to the SSDs.

Yes, I have only analyzed the defragmjentation on the SSDs, not tried to defragment them. I have no scheduling active for defrag..

Martin
My System SpecsSystem Spec
19 Jan 2012   #9

Windows 7 Home premium 64bit SP1
 
 

only defrag HDD's. The SSD will be fine.
My System SpecsSystem Spec
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 Defragging Solid State Drives?




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