Summary
Restoring a volume-backed image might cause slight changes in partition sizes. In the example, [Recovery, EFI, C drive] are backed up on a volume unit, and E drive is not backed up.
- Partition layout before restore PartitionNumber DriveLetter Offset Size Type --------------- ----------- ------ ---- ---- 1 1048576 450 MB Recovery 2 472907776 100 MB System 3 577765376 16 MB Reserved 4 C 594542592 27.45 GB Basic 5 E 30063722496 2 GB Basic - Partition layout after restore PartitionNumber DriveLetter Offset Size Type --------------- ----------- ------ ---- ---- 1 1048576 128 MB Reserved 2 135266304 450 MB Recovery 3 607125504 100 MB System 4 C 711983104 27.45 GB Basic - Partition layout after format unallocated space PartitionNumber DriveLetter Offset Size Type --------------- ----------- ------ ---- ---- 1 1048576 128 MB Reserved 2 135266304 450 MB Recovery 3 607125504 100 MB System 4 C 711983104 27.45 GB Basic 5 E 30181163008 1.89 GB Basic
In this scenario, the E drive has decreased 0.11GB.
Cause
In UEFI, the hidden "System Reserved" partition can't be backed up on a volume unit. It doesn't appear in Disk Management. During restoration, AIP will create a 128MB "System Reserved" partition. This is a known issue in AIP2018SP2M1 or earlier versions.
As a result, the unallocated area becomes limited.
* On Windows Server 2016 / Windows 10, the system reserved space is 16MB by default.
* This problem does not occur in BIOS.
Workaround
To restore to the original partition size, choose the disk unit or select all volumes for backup. The size shift issue was resolved in AIP2018SP2M2, so please upgrade. Use the WinPE Boot Environment for restoration; UEFI bare metal restore is not possible in the CentOS boot environment.
Target Products
– ActiveImage Protector 2018SP2M1 (5.1.1.5036) or earlier version
(13451128017305)
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