Lab notes · Pocket-size drives · BHD-2025-8635
The Diagnosis Arrived Before the Drive.
A cable snagged on a chair arm in Great Barr and pulled the Seagate off the desk while it was copying. Word of what had happened got here a day ahead of the parcel. His site laptops are looked after by an IT firm, and they had opened the drive, closed it again and been straight with him — that tick is the heads, not the motor
and this needs a proper lab, not us
. He had picked the drive up secondhand from an online ad. On it was a photo of every driveway and patio I ever laid
.
Sounds like yours? Give us a ring.
0800 6890668
What that means.
The firm was right, and being right was also the end of what it could do. The flying height of a head above a disc is set on the production line and measured in nanometres. Once an arm sits crooked, no amount of bench work brings it back: either a donor stack from the same family goes in, or the job stops there. What nobody can call in advance is the state of the surfaces, because a drive knocked over while it is reading can drop a head onto the coating. Damage of that kind gets worked around, never read through. Which is why a firm price quoted before the lid is off is only a guess wearing a suit.
What did the work here.
The order of the work →| Equipment | The job it did | What it adds |
|---|---|---|
| DeepSpar Disk Imager 4 | Graded each head for consistency as soon as the donor stack read | Head mapping first, then one surface at a time, with resets, timeouts and power all governed |
| PC-3000 Data Extractor | Sequenced the reads so the scored band waited until the clean areas were safe | Reads the disk from inside its firmware, using the PC-3000's imager |
| ACE Lab PC-3000 Express | Pulled the firmware's own service log, the past a used drive cannot edit | Gets at the factory service commands that standard ATA cannot carry |
What we did.
Look at the discs before deciding anything
Under magnification the firm's call held up: one arm sat higher than the rest, and a stack that is not true reads nothing. The discs mattered more. A head had touched down and left a pale band round the second platter, light rather than the deep ring of scoring that ends a job on the spot. The firmware log filled in the rest, and it had been quietly retiring sectors long before he ever bought it.
Sourcing a stack this thin chassis would accept
There is almost no room inside a slim portable Seagate, and drives built that tight are fussy about what goes in them. The donor had to match the patient on family and on firmware generation; the capacity on the label narrows a search down and settles nothing. One came off our donor shelf. It went in under laminar flow, the disc spun up cleanly and held speed, and every head was graded on its own before any bulk reading started.
Clean surfaces first, the damaged ring last
With the new stack at its best, the undamaged surfaces were read straight through, start to finish. The touched band was left until the end and handled gently: brief runs, few retries, a rest between them. It gave up a decent share of what was there, then stopped answering, and we left it alone.
How it closed.
Nearly all of it came back on fresh media, year upon year of job photographs, checked over and filed by address. What was missing went into the report as well. One folder from his first summer in business lay under the touched band and stayed there, and those were the pictures he wanted for a warranty argument. Set against a used drive knocked over while reading, with no copy anywhere else, he was still well ahead.
Other pages worth a look here.
Also filed under Pocket-size drives.
Is yours behaving the same way?
Switch the device off, post it in, and decide nothing until the diagnosis comes back to tell you where you stand.