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RDD / Casebook

Jobs closed · written up after

The casebook. Closed jobs, described exactly as they ran.

Approval governs all of it. Nothing is published until the customer has been through the recovered material and told us to go ahead, and at that point every identifying detail comes out: the person, the firm, the town, the serial numbers. Each entry then points to the page dealing with that class of fault, for anyone wanting method rather than narrative. The entries below are illustrative examples written to show the shape a casebook entry takes; they are marked as such and will be replaced by genuine closed jobs as they are approved for publication.

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UK · RDD-2026-0551JOB LOGGED ✓

An ST1200MM0088 out of a PowerEdge R730, slot 3, clicking, with a RAID 5 set of six that could not rebuild without it and a second drive predictive

Two heads had failed and the controller had marked the drive failed; the owner powered down instead of rebuilding. The clicking drive had a matched head stack fitted on the clean bench and was imaged on the SAS imager head by head; the predictive-failure drive was imaged too, with its weak areas last. Both images went back on fresh drives and the set rebuilt cleanly.

100% of the member recovered4 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0558JOB LOGGED ✓

Six MO1600JVYPR SSDs in a DL380 Gen9 RAID 5, four failed within an hour at 40,000 hours, the other two updated and re-added by an engineer the same afternoon

The free look found two of the four failed drives answering at controller level and two not. Two members of six was not enough to rebuild a RAID 5, and the survivors had been updated and re-added, which had already rewritten what a rebuild could have used. We said so, sent everything back, and did not charge.

0% recovered, and no bill3 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0559JOB LOGGED ✓

Fourteen 520-byte SAS drives from a decommissioned NetApp DS4246, kept in a cupboard for two years, with one aggregate's files needed for an audit

There was no filer left to put them in and every host that saw them offered to initialise them. All fourteen were imaged at 520 bytes on the SAS imager, the images translated to 512-byte sectors, and the RAID-DP aggregate reassembled in software from the translated images. The WAFL volume inside was opened and the audit's files copied out.

100% of the volume recovered10 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0557JOB LOGGED ✓

Four SEDs from an R740 whose PERC H740P had been replaced, leaving the set locked, with the passphrase in a password vault nobody had looked in

The passphrase decided the job. The four drives were unlocked on the SAS imager with it and imaged, one after a head swap on the clean bench, and the images went back on fresh drives with the set reassembled from them. The same job without the passphrase would have ended at the free look, unbilled.

100% of the set recovered6 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0553JOB LOGGED ✓

Eight ST16000NM001G drives in a Supermicro RAID 6, two dropped within a week, and FARM logs that showed 30,000 hours on drives bought as new

Both dropped drives were imaged, one after a head swap on the clean bench and the other slowly with its weak areas last; the FARM logs on all eight showed the set had been used before it was sold. Both images went back on fresh drives and the set was rebuilt, with a note about the other six.

100% of both members recovered6 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0563JOB LOGGED ✓

An R740 in RAID 5 that rebuilt with 47 bad blocks after a drive was replaced, and a SQL database that would not open afterwards

The owner sent the set here with the failed drive he had kept. The five current members were imaged and the PERC's bad-block table read; the failed drive was imaged with its weak areas last and its stripes used to fill 44 of the 47 holes. The database was repaired on the virtual volume with three pages rebuilt from its log.

99.99% of the volume recovered8 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0549JOB LOGGED ✓

Three Cheetah 15K.5 SCA drives from a PowerEdge 2850 whose PERC 4 had died, holding a practice's twenty years of patient records

The card was dead and one drive would not spin. The seized drive had its bearings freed and its heads checked on the clean bench and was imaged on a terminated Ultra320 controller with an SCA adaptor; the other two were imaged directly. The RAID 5 was reassembled from the three images and the database copied out.

100% of it recovered9 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0562JOB LOGGED ✓

An R720 whose PERC H710 was replaced by an engineer who cleared the foreign configuration to get the new card to boot

Four drives arrived with their description erased and their data untouched. Each was imaged, and the RAID 5's order and stripe size were recovered from the parity arithmetic across the images; the set was reassembled in software and the NTFS volume mounted from the virtual array.

100% of the volume recovered8 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0552JOB LOGGED ✓

A WD82PURZ from a Hikvision DS-7608 with a burglary on it, a clicking drive, and a recorder that had been left running for three days

A matched head stack was fitted on the clean bench and the drive imaged with the most recently written regions last; the Hikvision block format was parsed from the image and the three cameras that mattered reconstructed for the hour of the break-in.

The hour that mattered, from three cameras4 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0564JOB LOGGED ✓

An eight-drive mdadm RAID 6 that logged kicking non-fresh on two members after a power cut, then went inactive when the owner tried --assemble --force

All eight drives were imaged, the original superblocks read from the images, the two stale members identified by their event counts, and the set assembled in software from the six current members with the stale ones used only where the others could not read. The XFS volume mounted from the virtual array.

100% of the volume recovered8 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0560JOB LOGGED ✓

A PM9A3 out of an R750's vSAN node, missing after a power cut, with the disk group down and the cluster one failure from losing an object

The owner did not reset the host. The missing drive was imaged at controller level on a U.2 adaptor, its mapping table rebuilt from the image, and the disk group's components read from the images of all four drives. The objects came back and the cluster was resynced from them.

100% of the disk group recovered5 days here, and back by post
Illustrative example — replace with a genuine case
UK · RDD-2026-0567JOB LOGGED ✓

Eight NL-SAS drives in an MD1200 that vanished together when an expander module failed, then came back foreign to a PERC H810 that an engineer offered to clear

The owner declined and sent the shelf's drives here. Every drive was healthy; the configuration on them was intact and consistent, and the RAID 6 was reassembled in software from the images and the volume copied out. The shelf went back into service with a new expander module.

100% of the volume recovered7 days here, and back by post
Illustrative example — replace with a genuine case

Yours could be next on the list, or not, as you prefer.

Nothing is published without your say-so. The first look is free either way.

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