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post #41 of 848
Just a question real quick, whenever you get time. (great guide by the way)

Any tips for optimizing RAID 0? I have 2 160GB Velociraptors I plan to put in RAID 0, and was wondering if I need to take any special steps to make sure they work as well as possible.
    
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post #42 of 848
Thread Starter 
Quote:
Originally Posted by pow3rtr1p View Post

Just a question real quick, whenever you get time. (great guide by the way)

Any tips for optimizing RAID 0? I have 2 160GB Velociraptors I plan to put in RAID 0, and was wondering if I need to take any special steps to make sure they work as well as possible.

Mainly just use the latest RAID driver and set your strip size optimally (anywhere from 32-128 are fine). Otherwise I can't really think of anything for RAID in particular.
post #43 of 848
Is there somewhere I can read up on the advantages of different stripe sizes? Or do you have a quick and dirty explanation of stripe sizes?
    
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post #44 of 848
Thread Starter 
Quote:
Originally Posted by pow3rtr1p View Post

Is there somewhere I can read up on the advantages of different stripe sizes? Or do you have a quick and dirty explanation of stripe sizes?

Smaller strip size = faster with small random files.

Larger stripe size = faster with larger sequential files.

Info here: http://www.tomshardware.com/reviews/RAID-SCALING-CHARTS,1735.html

And possibly Google around for more info. 64 or 128 is what I usually use.
post #45 of 848
Quote:
Disable Prefetch and Superfetch: Applies to SSDs only
The purpose of these is to pre-load the programs you load from slow hard drive to fast memory (cache) in case you want to run them. With your SSD, there is no need. Disable them and free up some memory and resources and stop a lot of writes to the SSD. However, this may hurt performance in older first gen SSDs and HDDs.
Open your Windows 8 Task Manager and select "More details" from the bottom-left corner.
Then, choose the "Services" tab from the top and locate the "SysMain" service with "Superfetch" under "Description." Right-click and "Stop" the service.
Press the "Windows Key" + 'R" on your keyboard and type Services.msc, press Enter.
It will be under "Settings," select the "View local services" icon.
Scroll down until you see the "SuperFetch" entry.
Double-click it and choose "Disabled" from the drop down list.

Next:
Press the "Windows Key" + 'R" on your keyboard and type regedit, press Enter.
Go to:
Code:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters

Double-click on "EnablePrefetcher" and enter "0" (default value is "3")
Double-click on "EnableSuperfetch" and enter "0" (default value is "3")


I have found that "Double-click on "EnableSuperfetch" and enter "0" (default value is "3")" is not in my registry with the enableprefetcher entry. Just wondering if this has been moved or is no longer relevant?

Using win8 64 with 2x256gb vertex 4 in raid0



Thanks for this great guide
post #46 of 848
Hey Sean. I noticed that there weren't instructions to do a 4K alignment in this guide but there is one in your windows 7 guide. Is it not necessary for a 4K alignment for ssd users in windows 8? also, is it necessary for one to perform the 4k alignment every time they install Windows on the same SSD? just in case they would want a fresh install, again. there's not much reason to always reinstall windows, but just in case.
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post #47 of 848
Quote:
Originally Posted by khaxnguyen View Post

Hey Sean. I noticed that there weren't instructions to do a 4K alignment in this guide but there is one in your windows 7 guide. Is it not necessary for a 4K alignment for ssd users in windows 8? also, is it necessary for one to perform the 4k alignment every time they install Windows on the same SSD? just in case they would want a fresh install, again. there's not much reason to always reinstall windows, but just in case.

Thought I'd try to help out and answer some of your concerns. I don't think alignment is OS dependent. In that, windows 7/8 can't automatically alignment your SSD/HDD. If you want it done then you should align it before installation. As far as I know the instructions for windows 8 are the same for windows 7. Follow the same steps. If you wipe your SSD with something like parted magic then yes, I think you have to reapply the alignment. I hope this helps. Please correct me if I am wrong.
post #48 of 848
Hi Sean,

Awesome guide btw! Do you think this guide will change once Windows 8 is released on October 26? Are there any "surprises" we should expect that could forces changes to the optimization guide? I know the Win8 is based on Win7, but I thought it wouldn't hurt to ask. I plan on downloading Win8 once it becomes available, but I don't know if I should hold off before I do I fresh install.

Thanks!

Andrew
post #49 of 848
Thread Starter 
First of all this is getting annoying, I swear I have replied to this and other threads already and I come back and there are no replies. Either I am crazy or lazy, idk. frown.gif
Quote:
Originally Posted by Wanderinlost View Post

Quote:
Disable Prefetch and Superfetch: Applies to SSDs only
The purpose of these is to pre-load the programs you load from slow hard drive to fast memory (cache) in case you want to run them. With your SSD, there is no need. Disable them and free up some memory and resources and stop a lot of writes to the SSD. However, this may hurt performance in older first gen SSDs and HDDs.
Open your Windows 8 Task Manager and select "More details" from the bottom-left corner.
Then, choose the "Services" tab from the top and locate the "SysMain" service with "Superfetch" under "Description." Right-click and "Stop" the service.
Press the "Windows Key" + 'R" on your keyboard and type Services.msc, press Enter.
It will be under "Settings," select the "View local services" icon.
Scroll down until you see the "SuperFetch" entry.
Double-click it and choose "Disabled" from the drop down list.

Next:
Press the "Windows Key" + 'R" on your keyboard and type regedit, press Enter.
Go to:
Code:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters

Double-click on "EnablePrefetcher" and enter "0" (default value is "3")
Double-click on "EnableSuperfetch" and enter "0" (default value is "3")


I have found that "Double-click on "EnableSuperfetch" and enter "0" (default value is "3")" is not in my registry with the enableprefetcher entry. Just wondering if this has been moved or is no longer relevant?

Using win8 64 with 2x256gb vertex 4 in raid0
Thanks for this great guide
I will have to look into that when I have the time, my Windows 8 is gone now and I have to reinstall it. lol. It shouldn't matter much, you can skip that if you like.

Quote:
Originally Posted by khaxnguyen View Post

Hey Sean. I noticed that there weren't instructions to do a 4K alignment in this guide but there is one in your windows 7 guide. Is it not necessary for a 4K alignment for ssd users in windows 8? also, is it necessary for one to perform the 4k alignment every time they install Windows on the same SSD? just in case they would want a fresh install, again. there's not much reason to always reinstall windows, but just in case.
Well, the default 1024 offset is 4k aligned already, however, I just like doing the 4KB offset myself because most SSDs are written to in 4KB pages.

You don't really need to do it, I have just left it out in this guide and I'm probably going to add it later, but it shouldn't make any difference in performance. Oh and if you do it manually Windows will not write a system reserve partition and right now idk what they will need the system reserve partition for in windows 8 so I am not excluding it for now.
Quote:
Originally Posted by AC0014 View Post

Quote:
Originally Posted by khaxnguyen View Post

Hey Sean. I noticed that there weren't instructions to do a 4K alignment in this guide but there is one in your windows 7 guide. Is it not necessary for a 4K alignment for ssd users in windows 8? also, is it necessary for one to perform the 4k alignment every time they install Windows on the same SSD? just in case they would want a fresh install, again. there's not much reason to always reinstall windows, but just in case.

Thought I'd try to help out and answer some of your concerns. I don't think alignment is OS dependent.
It is actually.
Quote:
In that, windows 7/8 can't automatically alignment your SSD/HDD.
They do. They use 1024KB (1MB) as the default.
Quote:
If you want it done then you should align it before installation. As far as I know the instructions for windows 8 are the same for windows 7. Follow the same steps. If you wipe your SSD with something like parted magic then yes, I think you have to reapply the alignment. I hope this helps. Please correct me if I am wrong.
You can simply use dispart just as I did in my Windows 7 guide too. smile.gif
Quote:
Originally Posted by AC0014 View Post

Hi Sean,

Awesome guide btw! Do you think this guide will change once Windows 8 is released on October 26? Are there any "surprises" we should expect that could forces changes to the optimization guide? I know the Win8 is based on Win7, but I thought it wouldn't hurt to ask. I plan on downloading Win8 once it becomes available, but I don't know if I should hold off before I do I fresh install.

Thanks!

Andrew
This is definitely not complete, things may be added or dropped. I have no idea what the final release will be like.
post #50 of 848
Thanks for getting back so soon Sean. I guess I should probably wait then. But, I meant that Win8 doesn't automatically apply the 4K alignment like the he/she was asking so he would have to do it manually/using disk part before installation or else windows will align the drive differently.

Ehhh...Why can't Win8 be here sooner! smile.gif
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