Failed to read shadow copy of volume , the system error is [The drive cannot find the sector requested. (27)].
Arcserve D2D Backup fails with error 'Failed to read shadow copy of volume , the system error is [The drive cannot find the sector requested. (27)]'. This error message occurs if the partition size is larger than the actual disk size.
Following error message will be recorded on the Backupxxx.log
CVolumeReplicatorSimpleNTFS::Replicate::ReadFile() returns error, volume length is 214744561664, offset = 214744432640, length = 126976, mserr=27
Also check the MSINFO32 and make sure that the Partition size ( bytes ) matches the Actual disk size ( bytes ).
Shrink the partition size using the Disk Management to the size that matches the actual disk size or lesser and then run the backup.
Note: Please go through the Microsoft Documentation befpre shrinking the volume.
Please refer the below link on how to shrink the volume.