RAID 10 geometry recovery
RAID 10 combines mirroring and striping, but controllers differ in pair layout, near or far copies, offsets, and member order. After controller loss or manual recreation, a plausible but wrong layout can expose corrupted files without obvious parity errors.
Understand the symptom
Two disks can contain similar data because they are mirrors, but generation differences, write holes, rebuild history, and controller-specific placement matter. Recovery compares block similarity, timestamps, filesystem structures, and member metadata to determine pairs, choose current copies, and establish stripe geometry.
What you may see
The controller accepts a layout whose block order does not match the original.
Wrong pair or stripe sequencing can misdirect alternating regions.
An interrupted rebuild or stale member created generation differences.
Replacement hardware sees disks but not the original virtual-disk map.
Protect the source
A new virtual disk can overwrite metadata and the beginning of the file system.
One member may be stale or partially rebuilt.
A superblock may parse while later blocks come from the wrong member.
Do this now
Do not import read-write, initialize, rebuild, check, or repair the filesystem.
Photograph bays and record serials, controller ports, failure events, and replacements.
Export virtual-disk configuration, cache state, firmware, stripe size, and logs.
Use protected copies before testing mirror and stripe combinations.
NEPFOSYS process
NEPFOSYS compares block signatures and generation evidence across every member.
Order, offsets, stripe size, copy layout, and stale-member choices are tested virtually.
Filesystem metadata, databases, and representative files confirm the chosen reconstruction.
A clear next step
Start a case with the exact symptoms, incident timeline, prior attempts, encryption details, and the files that matter most. NEPFOSYS will route the case to the appropriate DFW intake or nationwide mail-in path.
Start with a case reviewQuestions, answered
No. Pairing and stripe order vary by controller and implementation.
No. Equal capacity is expected but does not establish pair identity or which copy is current.
A wrong layout can feed unrelated blocks to the repair tool, causing it to write widespread damage.
DFW local · Nationwide mail-in