Question
You have an Active Directory Domain Services (AD DS) domain that contains the member servers shown in the following table.
Server3 contains a data disk named Disk1 that has Data Deduplication installed. Disk1 contains the files shown in the following table.
Server3 fails.
You need to recover the files on Disk1.
Which files can you recover if you attach Disk1 to Server1, and which files can you recover if you attach Disk1 to Server2? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
| Name | Operating system | Data Deduplication role service |
| --- | --- | --- |
| Server1 | Windows Server 2019 | Installed |
| Server2 | Windows Server 2022 | Not installed |
| Server3 | Windows Server 2022 | Installed |
| Name | Size |
| --- | --- |
| File1.txt | 5 KB |
| File2.docx | 800 KB |
| File3.sys | 2 MB |
| File4.bmp | 5 GB |
Explanation
Server1: File1.txt only. Data Deduplication replaces the data of each optimized file with a reparse point that points to chunks in the chunk store. Dedup is backward compatible but not forward compatible: an older Windows Server version cannot read data that a newer version deduplicated, and it reports those files as corrupted. Disk1 was deduplicated by Server3 (Windows Server 2022), and Server1 runs Windows Server 2019, so even with Data Deduplication installed it cannot read the optimized files File2.docx, File3.sys and File4.bmp. File1.txt is 5 KB. Data Deduplication only optimizes files larger than 32 KB, so File1.txt was never optimized. It is still a normal NTFS file that Server1 can read.
Server2: File1.txt only. Server2 runs Windows Server 2022 but does not have the Data Deduplication role service, so it has no deduplication filter to resolve the reparse points into the chunk store. The optimized files cannot be read there. File1.txt was never optimized, so it can be read. To recover every file, attach Disk1 to a server that runs Windows Server 2022 or later and has Data Deduplication installed, or install Data Deduplication on Server2.
