ZFS Pool Data Recovery
We specialise in professional data recovery for failed or degraded ZFS Pool systems, including RAID-Z, RAID-Z2, striped mirrors, and hybrid vdev setups. Whether your pool is faulted, unmountable, or suffering from multiple disk failures, our team can help recover your valuable data. We accept mail-in jobs Australia-wide.
ZFS Pool Common Problems
- Pool won't import due to missing or failed drives
- ZFS pool marked as FAULTED or DEGRADED
- Corrupted ZFS metadata or label headers
- Accidental zpool destroy or zfs destroy command
- Multiple disk failure in RAID-Z configurations
- ZIL/SLOG or L2ARC device failure
- Read/write errors causing system crashes
- Incompatibility after FreeNAS/TrueNAS update
ZFS Pool RAIDZ1 Data Recovery Caselog
02SEP25: RAIDZ1 pool with three ST4000VN008-2DR166 drives. Two (ZM401ZXR, ZDH5N8SG) had dead heads and showed “0003” terminal error. One drive (ZDH5F828) was healthy and used as a reference. ROMs read via terminal, preamp versions confirmed, and tech mode patching applied. ZDH5F828 was cloned to an 8TB donor; head swap planned into ZDH5N8SG for pool reconstruction.
RAIDZ2 TrueNas Data Recovery Caselog
27Feb26: This truenas raid pool came in for data recovery at our sydney data recovery service. The customer tried a lot of different experiments to get it working again. Unfortunately this has made the problem way worse then it needed to be for data recovery. Its got 6 hard drives with some in bad condition. We can see the zfs file system but it has been damaged from these experiments. The customer was originally quoted over $4000 dollars from a different company so they brought it to Zero Alpha for a 60% discount. The customer was in the middle of a resilver before another hard drive failed. Data recovery software could not scan this drive as the volume was so large (48tb) that it could not build anything. We increased ram size. We used this command: sudo zpool import -f -FXn "Mass Storage"