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Windows 7: Installation for Advanced Format Hard Drives?


21 Apr 2013   #41

Windows 8.1.1 64bit
 
 

Mine shows 102MB is this incorrect ?

My System SpecsSystem Spec
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21 Apr 2013   #42
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by COMPUTIAC View Post
Mine shows 102MB is this incorrect ?
No problem with this disk. It is well aligned.
My System SpecsSystem Spec
21 Apr 2013   #43

Windows 8.1.1 64bit
 
 

Thank's for the quick reply.

Why is it not 101MB ?
My System SpecsSystem Spec
.


21 Apr 2013   #44
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by COMPUTIAC View Post
Thank's for the quick reply.

Why is it not 101MB ?
That is a good question. But it does not matter. The disk is fine.
My System SpecsSystem Spec
21 Apr 2013   #45

Windows 7 Professional x64 Linux Mint 16
 
 

It has to be an even number, right Wolfgang ?
My System SpecsSystem Spec
21 Apr 2013   #46
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by AddRAM View Post
It has to be an even number, right Wolfgang ?
It has to be a number divisible by 4 at the KB level. So 1024KB is good but 102MB is also good because that is 102.000KB which is divisible by 4.
My System SpecsSystem Spec
21 Apr 2013   #47

Windows 7 Ultimate x64 SP1
 
 

Assuming that 1MB == 1024KB, 102MB == 104,448KB which is still divisible by 4.
My System SpecsSystem Spec
21 Apr 2013   #48
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by King Arthur View Post
Assuming that 1MB == 1024KB, 102MB == 104,448KB which is still divisible by 4.
Thanks, that looks like the more exact conversion in the binary system.
My System SpecsSystem Spec
21 Apr 2013   #49

Windows 7 Ultimate SP1 (64 bit), Windows XP SP3, Linux Mint 17 MATE (64 bit)
 
 
I'm still confused

Thanks whs, but I'm still confused.

Quote:
Verification

If you want to verify the alignment (e.g. for a SSD where you are not certain whether the proper alignment was done), you use the following commands.

Diskpart
List disk
Select disk n
List partition

Now you should see a result like this.

Partition ### Type Size Offset
------------- ---------------- ------- -------
Partition 1 Primary 59 GB 1024 KB - but 64KB or any number divisible by 4 is also good

The offset (in KBs) has to be divisible by 4.


Note: Some readers and users of this tutorial got confused because the alignment numbers in a typical Windows7 installation are shown as:

1024KB for the 100MB partition
101MB for the next partition - which is most likely the C partition

They think that 101MB is not divisible by 4 and that there must be a problem. But that is not so. If you convert 101MBs into KBs (multiply by 1024), then the number is divisible by 4 and the partition is aligned.
By definition any integer multiplied by 1024 will be divisible by 4 (e.g. n x 1024 = n x 256 x 4).

Are you saying that the minimum offset must be 64 KB or more?
As a result, does this mean that I can't clone my OS partitions directly to a SSD (as the offset on Disk 0 is 31 KB)?
Installation for Advanced Format Hard Drives?-diskpart-alignment-13-04-22-.png
I always pre-partition my HDDs (using GParted) before installing any operating systems.
Is the end result, modern formatting tools (e.g. GParted) automatically create the correct format (which they should) without any input required from the user?


My System SpecsSystem Spec
21 Apr 2013   #50
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

1. On your cmd picture, disk0 and disk1 are not aligned. Disk2 is aligned.

2. I am not sure whether all imaging programs will maintain the original alignment. Macrium does if you recover the image a certain way. See here under Advanced Topics > Partition Alignment
My System SpecsSystem Spec
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 Installation for Advanced Format Hard Drives?




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