SCI-CD

h1. Выравнивание дисковых разделов Windows

Windows 2003 не выравнивает первый раздел, Windows 2008 иногда не выравнивает.

Это приводит к дополнительной операции ввода-вывода при записи блока

h2. Creating and Formatting Disks

To Create and Format a Disk:

1. Open a command prompt, type @DISKPART@, and press ENTER.

2. For Windows 2008, Type the following commands within DISKPART:

<pre>

SELECT DISK 1

CREATE PARTITION PRIMARY ALIGN=64

SELECT PARTITION 1

FORMAT FS=NTFS LABEL="New Volume" QUICK UNIT=8192

ASSIGN LETTER=E

EXIT

</pre>

For Windows 2003, the format command is not available within DISKPART. Type the following commands in 

<pre>

DISKPART:

SELECT DISK 1

CREATE PARTITION PRIMARY ALIGN=64

SELECT PARTITION 1

ASSIGN LETTER=E

EXIT

</pre>

Then type this command from the command prompt:

<pre>

FORMAT E: /FS:NTFS /V:NewVolume /Q /A:8192  ISILON SYSTEMS

</pre>

h2. Checking Disk Alignment and Block Size

To Check an Existing Partition for Alignment:

1. Open a command prompt and type:

<pre>

wmic partition get BlockSize, StartingOffset, Name, Index

</pre>

2. Notice the result of StartingOffset is 65536 or 64 KB:

<pre>

BlockSize  Index  Name                   StartingOffset

512        0      Disk #1, Partition #0  65536

</pre>

To Check an Existing Partition for Unit Allocation Size (Block Size)

1. Open a command prompt and type:

<pre>

fsutil fsinfo ntfsinfo e:

</pre>

2. Notice the result of Bytes per Cluster is 8192 or 8 KB:

<pre>

NTFS Volume Serial Number :       0xf8e05f38e05efc76

Version :                         3.1

Number Sectors :                  0x00000000095fd83d

Total Clusters :                  0x000000000095fd83

Free Clusters  :                  0x000000000095dcb2

Total Reserved :                  0x0000000000000000

Bytes Per Sector  :               512

Bytes Per Cluster :               8192

Bytes Per FileRecord Segment    : 1024

Clusters Per FileRecord Segment : 0

Mft Valid Data Length :           0x0000000000008000

Mft Start Lcn  :                  0x0000000000060000

Mft2 Start Lcn :                  0x00000000004afec1

Mft Zone Start :                  0x0000000000060000

Mft Zone End   :                  0x000000000018bfc0

</pre>

Списано "отсюда":http://www.isilon.com/sites/default/files/tracked_assets/Isilon%20Best%20Practices%20Guide%20for%20the%20Microsoft%20iSCSI%20Initiator.pdf