U:\jbod_repair.exe --scan PhysicalDrive2,PhysicalDrive3,PhysicalDrive4,PhysicalDrive5 --output virtual.vhd The tool scans each disk’s first sector for boot records. It detects that PhysicalDrive2 has a valid NTFS boot sector but an invalid volume size. It then scans PhysicalDrive3 and finds the continuation of the $MFT.

The metadata for this span is stored in the or GPT (GUID Partition Table) of the first disk. If Disk 2 becomes disconnected or develops logical corruption, the OS loses track of where Disk 1 ends and Disk 2 begins.

Open DiskPart or the repair tool’s own disk list. Note the physical drive numbers (e.g., PhysicalDrive2, PhysicalDrive3, PhysicalDrive4, PhysicalDrive5).

By using a high quality portable executable—whether it’s the free command-line power of TestDisk or the professional-grade reconstruction of DMDE or UFS Explorer—you retain full control. You work from a clean USB environment, you reconstruct the span virtually, and you rescue your data without writing a single byte to the original disks.

When disaster strikes, you need a specialized solution. General recovery tools often fail because they assume a standard filesystem layout. Enter the niche but critical category of . And not just any tools— high quality portable executables ( exe files) that can run from a USB stick without installation.

Use FastCopy or Robocopy to copy data from the virtual volume to a fresh, healthy drive.

Insert your recovery USB containing the portable EXE.

In the world of data storage, few configurations are as misunderstood—or as vulnerable—as JBOD (Just a Bunch Of Disks). Unlike RAID 0, 1, or 5, JBOD offers no striping, no parity, and often no redundancy. It is a simple concatenation of drives into a single logical volume. While this maximizes usable space, it also creates a single point of catastrophic failure: if one disk in the chain develops a corrupt partition table, a bad sector, or a logical error, the entire JBOD span can become unreadable.