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Offset/Alignment @ 4K Cluster

idata
Esteemed Contributor III

I am wondering if this is going to be an issue with this drive, asI have never seen this before...

I just recently reinstalled Windows 7 Professional x64 with Service Pack 1, and after running

the AS SSD Benchmark, I noticed this (in red) in the information:

Is there any way to fix this?

31 K - BAD

When I move the mouse cursor to it, it pops up the following message:

Offset/Alignment @ 4K Cluster

9 REPLIES 9

idata
Esteemed Contributor III

I assume that you did not use the Windows 7 installer originally on this SSD? W7 correctly aligns the disk by default. You must have either cloned the OS or created the OS partition using a 3rd party tool.

Basically, the SSD has to do more work if it writing data near these boundary disk areas.

Here's a calculator to check alignment yourself: http://www.techpowerup.com/articles/other/157 http://www.techpowerup.com/articles/other/157

It is fixable.... you have to take an image of your current disk, create a partition to force alignment, and reapply the image. As always, be sure to make backup(s) of your data before these type of work.

Here is just one of many methods using GParted: http://www.tuxyturvy.com/blog/index.php?/archives/59-Aligning-Windows-Partitions-Without-Losing-Data... http://www.tuxyturvy.com/blog/index.php?/archives/59-Aligning-Windows-Partitions-Without-Losing-Data...

idata
Esteemed Contributor III

I used a 3rd party tool (GParted), as I was trying to avoid Windows 7 creating the 100mb System Partition.

I then installed Windows 7 as normal, and after installing AS SSD Benchmark, that's when I noticed the

Offset/Alignment problem.

I have tried your fix, with no success... These are the steps I took...

Created a backup image of the SSD using Roxio's BackOnTrack, using the Disaster Recovery option.

Saved the image to another hard drive and tested/checked it's integrity -> ok.

Rebooted, went into the BIOS, changed the controller to IDE, rebooted with a DOS 6.22 boot disk and

ran a Secure Erase on the SSD. Rebooted again, changed BIOS back to AHCI, and rebooted with the

Windows 7 installation disc. At the setup page, I opened a command window (shift-F10), and ran Diskpart,

Created an active primary partition, and then formatted it NTFS (quick). Rebooted again and ran the Roxio

BackOnTrack Restore (using a boot cd created when I ran the original backup), and restored the hard disk

image. After booting back into Windows 7, I ran the AS SSD Benchmark program, I see the problem is still

there... Am I still doing something wrong?

Frustration setting in...

Any help here would be really appreciated again, as I don't want to start the whole ordeal again from scratch!

I had a heck of a time trying to activate my copy of Windows 7 last time, dodn't want to have to go thru that again....

Thanks in advance....

idata
Esteemed Contributor III

That 100MB partition that installer creates is used for alignment.

Are sure the diskpart was the right size?

Sorry, I forget to not that Intel engineers have stated that misalignment does not impact the G1/G2 performance. Your benchmark numbers are in line with expected values.

idata
Esteemed Contributor III

I have managed to fix the problem....

I used a utiltiy from Paragon called "Partition Alignment Tool",

and after allowing the software to re-align the partition, this is

the result: