Vmfs Recovery (WORKING ◎)

fd = read_fd(fd_number) for each block_pointer in fd.fbt: dd if=vmfs_disk.dd of=recovered_flat.vmdk \ bs=<vmfs_block_size> skip=<block_pointer> count=1 seek=<output_offset> These are stored in metadata heaps. Use vmfs-fuse (from vmfs-tools) in read‑only mode if superblock is partially valid:

# Check VMDK descriptor consistency vmkfstools -Q recovered_vm.vmdk dd if=recovered_flat.vmdk bs=1M count=1 | hexdump -C Attempt to mount or clone vmkfstools -i recovered_flat.vmdk -d thin verified.vmdk vmfs recovery

sgrep -b 'VMFS5' vmfs_disk.dd FDs start with a known pattern (e.g., FD 00 00 01 for VMFS5). Scan the entire disk: fd = read_fd(fd_number) for each block_pointer in fd

dd if=vmfs_disk.dd bs=512 | strings -n 8 | grep -E "FD.4,8VMFS" Manually map FD number → block pointers. If you have the FD for a flat VMDK ( -flat.vmdk ), you can extract its data blocks sequentially using the FB table. If you have the FD for a flat VMDK ( -flat

dcfldd if=/dev/sdX of=vmfs_disk.dd hash=sha256 hashlog=hash.txt bs=1M conv=noerror,sync # Or using ddrescue for failing drives ddrescue -f /dev/sdX vmfs_disk.dd vmfs_mapfile Commercial tools are often the fastest path:

| Tool | Best for | |------|----------| | | VMFS3/5/6, deleted VMDKs, RAID reconstruction | | R‑Studio | VMFS datastores with partition table loss | | SysTools VMFS Recovery | Simple file extraction from healthy metadata | | vmfs-tools (open source) | Manual CLI recovery, limited to clean FS |

Example (pseudo‑script logic):