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// case file · External · LaCie LRD0TU9 · bad sectors · imaging

Millions of bad sectors, read once and carefully.

A LaCie LRD0TU9 with a damaged port, connecting intermittently and less often each time. The drive carried millions of bad sectors and was imaged on DeepSpar hardware rather than copied conventionally.

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// the brief

What arrived, and what it was doing.

The client identified the symptom accurately: a physically damaged port, and a drive connecting intermittently with decreasing frequency. They wanted the contents moved onto another drive.

Decreasing connection frequency is a warning worth acting on immediately. Whatever the underlying cause, the number of remaining opportunities to read that drive was falling, and each unsuccessful attempt consumed one of them.

// diagnosis

What had actually failed.

Assessment found the drive riddled with bad sectors — millions of them. That volume of defects makes conventional copying not merely slow but actively harmful.

A normal file copy retries a failed sector repeatedly, because the operating system assumes the disk is basically healthy and its job is to return that data. On a drive with millions of defects, those retries keep the drive working at maximum effort for hours against regions it cannot read, and the drive deteriorates further while it happens.

// the work

What was done, and in what order.

StageMethodResult
AssessmentPort damage confirmed, defect density established Millions of bad sectors identified across the surface. Imaging required
ImagingDeepSpar imaging hardware, configured for high defect density Read once and move on rather than retry. Difficult regions revisited afterwards with adjusted timing, head selection and read direction. Imaged
ExtractionFile system rebuilt from the image All reconstruction carried out against the copy, so the failing drive was never asked to work again. Data extracted
DeliveryRecovered data supplied on separate media As the client requested, contents moved to another drive. Delivered
// outcome

What came back.

The data was extracted from the image. The drive itself was not returned to service, and a drive in that condition should not be.

This job illustrates the practical difference between imaging and copying more clearly than most. The same physical disk, approached two ways, produces two entirely different outcomes — and the conventional approach is the one that fails.

// the transferable bit

What generalises from this job.

01 / FALLING FREQUENCY IS A COUNTDOWN

Act on it

A drive that connects less often each time has a limited number of reads left. Every failed attempt spends one of them.

02 / COPYING IS NOT IMAGING

The retry behaviour differs

Your computer retries a bad sector hard. Imaging hardware reads once, moves on, and comes back later with different settings. On a badly degraded drive that difference decides the outcome.

03 / MILLIONS OF DEFECTS IS STILL WORKABLE

With the right approach

Defect density affects how long imaging takes and how much comes back. It does not automatically make a drive unrecoverable.