Hardware and RAID configuration:
20 x 4-TB drives configured as RAID 6.
Our longtime customer contacted us seeking for a way to bypass all
layers and restore the end-user data directly. If this can be done, it will
save about 42 TB of storage space and 6 days supposedly used for staging steps.
- All RAID settings are provided. We double-check and found no abnormality. All drives seem to
store the most current data.
- The host Ext4 volume stores
42 iSCSI files,
approximately 1 TB each. These iSCSI files form a large VMFS
volume, where all the virtual machines reside. The main goal is to restore these
virtual machine files directly without saving the LUNs.
- Run File Scavenger® in special mode in which only the metadata of the 42 iSCSI files are restored.
- Parse the metadata and create a large mapping table for the VMFS volume.
- Modify the File Scavenger® code so it can accept the manually-fed custom volume definition.
- Once the VMFS volume is well defined, run the scan and restore the virtual machine data.
- 17-TB of virtual machine data is restored. The user-files inside the virtual disks is also checked
to ensure data integrity. It is a successful recovery.