Acronis Backup for Windows Server Essentials - User Guide - Manual (Page 141)

141 Copyright © Acronis International GmbH, 2002-2014
If there is enough unallocated space, the volumes will be recovered "as is".
If unallocated space on the target disks is less than the size of the volumes being recovered,
the volumes will be proportionally shrunk (by decreasing their free space) in order to fit the
unallocated space. If the shrunk volumes still cannot fit the unallocated space, you have to
map the volumes manually.
Support for Advanced Format (4K-sector) hard disks
Acronis Backup can back up hard disks with a sector size of 4 KB (known as Advanced Format disks),
as well as traditional hard disks that have 512-byte sectors.
Acronis Backup can recover data from one disk to another as long as both disks have the same logical
sector size. (This is the sector size presented to the operating system.) Acronis Backup automatically
aligns the disk’s volumes (p. 144) if necessary. This way, the start of a cluster in the file system always
matches the start of a physical sector on the disk.
The disk management (p. 263) functionality of Acronis Backup is not available for disks with a 4-KB
logical sector size.
Determining the logical sector size
By disk specification
Development of the Advanced Format technology is coordinated by the International Disk Drive
Equipment and Materials Association (IDEMA). For more details, see
http://www.idema.org/?page_id=2.
In terms of the logical sector size, IDEMA specifies two types of Advanced Format disks:

512 Byte emulation (512e) disks have a 512-byte logical sector size. These disks are supported in
Windows starting with Windows Vista, and in modern Linux distributions. Microsoft and Western
Digital use the term “Advanced Format” exclusively for this type of disk.

4K native (4Kn) disks have a 4-KB logical sector size. Modern operating systems can store data on
these disks, but they generally cannot boot from these disks. These disks are commonly external
drives with USB connection.
By running the appropriate command
To find out the logical sector size of a disk, do the following.
In Windows:
1. Make sure that the disk contains an NTFS volume.
2. Run the following command as an administrator, specifying the drive letter of the NTFS
volume:
fsutil fsinfo ntfsinfo D:
3. Examine the value in the Bytes Per Sector line. For example, the output may be the
following:
Bytes Per Sector : 512
In Linux:
1. Determine the device name of the disk, such as /dev/sdb.
2. Run the following command as the root user, specifying the device name:
parted /dev/sdb print