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Windows 7: Prefetch and SSDs

14 Jul 2011   #71
GeneO

Windows 7 64 bit SP1. EFI boot partition, full EFI boot.
 
 

You are right. Micro$oft must have realised that there is not much reason to have specialized code and that there is not any reason to disable suprferch anyhow. So I say follow ms lead.


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14 Jul 2011   #72
essenbe
Microsoft MVP

Windows 7 Ultimate SP1 X64 (Windows 10, 8.1, Linux Mint, Windows XP and others in VM)
 
 

Quote   Quote: Originally Posted by GeneO View Post
You are right. Micro$oft must have realised that there is not much reason to have specialized code and that there is not any reason to disable suprferch anyhow. So I say follow ms lead.
I really don't know which is best, but Microsoft's reasoning was on 1st GEN SSDs, we are now in the 3rd GEN. I would think that the SSD manufacturers would want their SSDs to run as well as possible and they all recommend disabling it. What I would really like to know is why SSD manufacturers recommend that. They must have some reason. They just won't tell what it is.
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15 Jul 2011   #73
cluberti

Windows Server 2008 R2
 
 

Given it's not for performance (pro or detriment), I'd wager a guess it's for extending the life of the drives. Given a desktop/laptop or even workstation with a 2nd or 3rd gen SSD moves the resource bottleneck to the CPU, it's not really necessary to have any of that hitting the "disk" anymore. Most of the superfetch and prefetching is meant to alleviate the performance hit to a mechanical disk by Windows, and given an SSD does not have those limitations those technologies really aren't useful anymore.
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08 Aug 2011   #74
stereo

Windows 7 Ultimate x64
 
 

What about to move the pagefile on the HDD ( as D partition ) ?
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08 Aug 2011   #75
cluberti

Windows Server 2008 R2
 
 

The paging file is mostly read and rare writes (unless under incredible load that passes RAM capacity), an SSD (even Gen1) is a very good place for a paging file (given the nature of how the paging file is used).
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08 Aug 2011   #76
essenbe
Microsoft MVP

Windows 7 Ultimate SP1 X64 (Windows 10, 8.1, Linux Mint, Windows XP and others in VM)
 
 

In an interview Microsoft said that pagefile reads outnumber writes 40-1, and that the majority of writes were something like 60kb or less. Considering the write tests they are doing at xtremesystems, I don't think a few writes will hurt. These are the latest numbers released

xtremesystems write endurance test

Post #1228, #1230

Kingston SSDNow 40GB- Intel 25 rebrand
220.19 TiB writes
MWI- 1 July 25th
RaS-6

Intel 320 40GB No update since 8/4/11
271.0 TiB writes.
MWI- 1 - Since July 9th. @ 190.5 TB
RaS-39

Samsung 470
368.289 TiB writes
MWI-1 (approx. 5 weeks ago)

They also have a C300 , an M4 and a couple of others that have just started.
My System SpecsSystem Spec
09 Aug 2011   #77
GeneO

Windows 7 64 bit SP1. EFI boot partition, full EFI boot.
 
 

Quote   Quote: Originally Posted by essenbe View Post
In an interview Microsoft said that pagefile reads outnumber writes 40-1, and that the majority of writes were something like 60kb or less. Considering the write tests they are doing at xtremesystems, I don't think a few writes will hurt. These are the latest numbers released

xtremesystems write endurance test

Post #1228, #1230

Kingston SSDNow 40GB- Intel 25 rebrand
220.19 TiB writes
MWI- 1 July 25th
RaS-6

Intel 320 40GB No update since 8/4/11
271.0 TiB writes.
MWI- 1 - Since July 9th. @ 190.5 TB
RaS-39

Samsung 470
368.289 TiB writes
MWI-1 (approx. 5 weeks ago)

They also have a C300 , an M4 and a couple of others that have just started.
I have been following that forum for a while. Their m4 is still running strong at > 150% of its rated life with no errors or reallocated sectors. Looking at the number of erase cycles on my m4 and the number of power on hours, if mine does as well as theirs up to now, then my m4 SSD should last over 17 power on years, which is more than 25 of my years
My System SpecsSystem Spec
09 Aug 2011   #78
essenbe
Microsoft MVP

Windows 7 Ultimate SP1 X64 (Windows 10, 8.1, Linux Mint, Windows XP and others in VM)
 
 

Quote   Quote: Originally Posted by GeneO View Post
Quote   Quote: Originally Posted by essenbe View Post
In an interview Microsoft said that pagefile reads outnumber writes 40-1, and that the majority of writes were something like 60kb or less. Considering the write tests they are doing at xtremesystems, I don't think a few writes will hurt. These are the latest numbers released

xtremesystems write endurance test

Post #1228, #1230

Kingston SSDNow 40GB- Intel 25 rebrand
220.19 TiB writes
MWI- 1 July 25th
RaS-6

Intel 320 40GB No update since 8/4/11
271.0 TiB writes.
MWI- 1 - Since July 9th. @ 190.5 TB
RaS-39

Samsung 470
368.289 TiB writes
MWI-1 (approx. 5 weeks ago)

They also have a C300 , an M4 and a couple of others that have just started.
I have been following that forum for a while. Their m4 is still running strong at > 150% of its rated life with no errors or reallocated sectors. Looking at the number of erase cycles on my m4 and the number of power on hours, if mine does as well as theirs up to now, then my m4 SSD should last over 17 power on years, which is more than 25 of my years
Just be careful, don't do too many writes to it.
My System SpecsSystem Spec
09 Aug 2011   #79
carwiz

Windows 7 Pro-x64
 
 

It won't matter by then. We'll all have computers in our brain and SSDs will be the size of a postage stamp.
My System SpecsSystem Spec
09 Aug 2011   #80
essenbe
Microsoft MVP

Windows 7 Ultimate SP1 X64 (Windows 10, 8.1, Linux Mint, Windows XP and others in VM)
 
 

Quote   Quote: Originally Posted by carwiz View Post
It won't matter by then. We'll all have computers in our brain and SSDs will be the size of a postage stamp.
Right, I have 2 M4's, an X25 and a Vertex2. I started to say that my 9 year old Granddaughter will be able to use them. But, by then they will be too large and too slow.
My System SpecsSystem Spec
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 Prefetch and SSDs




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