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Summary



When trying to restore from a file level backup of a compressed source file system there are failures with all files.

Symptoms



During the restore immediately when the first files are attempted the errors below are reported in the job log:

10.11.0.23 ssevthnd Thu Nov 01 11:11:27 2018 SNBEHD4281E 9392: Job 1541088359 task 1 file 10034 [W:\RestoreTestSR\<some_path>\<some_file>.xls]: error 1024 (error restoring file mode)
10.11.0.23 ssevthnd Thu Nov 01 11:11:27 2018 SNBEHD4281E 9392: Job 1541088359 task 1 file 10035 [W:\RestoreTestSR\<some_path>\<some_file>.xls]: error 1024 (error restoring file mode)
10.11.0.23 ssevthnd Thu Nov 01 11:11:27 2018 SNBEHD4281E 9392: Job 1541088359 task 1 file 10036 [W:\RestoreTestSR\<some_path>\<some_file>.xlsx]: error 1024 (error restoring file mode)
10.11.0.23 ssevthnd Thu Nov 01 11:11:27 2018 SNBEHD4281E 9392: Job 1541088359 task 1 file 10041 [W:\RestoreTestSR\<some_path>\<some_file>.docx]: error 1024 (error restoring file mode)

The backup source was a Windows compressed volume or directory.

Resolution



Ensure that the destination volume can support compression. Windows volumes with a cluster size larger than 4K will not support compression and the restore data needs to be written in a compressed state. To determine cluster size on the volume use diskpart and reference the article below for default cluster sizes depending on volume size.

Default cluster size for NTFS, FAT, and exFAThttps://support.microsoft.com/en-us/help/140365/default-cluster-size-for-ntfs-fat-and-exfat 

The restore needs to be redirected to a volume that supports compression.