Stiction occurs when the read/write heads become physically bonded to the platter surface, usually due to impact, humidity, or a sticky residue on the platter's protective lubricant layer. This results in the drivze not spinning up (often a buzzing or quiet whine). This is the first critical mechanical step.
|
Step |
Procedure |
Critical Challenge/Risk |
|---|---|---|
|
1. Cleanroom Opening |
The drive cover is carefully removed in the cleanroom to expose the platters and head assembly. |
Dust and contaminants must be prevented from entering the enclosure. |
|
2. Head Unsticking |
A specialized head unsticking tool (often a thin, non-abrasive spatula or pick specific to the drive model) is used to gently create leverage to lift the head sliders off the platter surface. |
Forcing the head to break free will rip the magnetic layer (data) right off the platter, causing permanent data loss. |
|
3. Parking the Heads |
Once the heads are freed, they are immediately moved to their designated parking ramp or secured using head combs. |
Even a brief, uncontrolled movement of the freed head over the platter can cause destructive scoring. |
|
4. Post-Unstick Diagnosis |
After freeing the heads, the heads and platters must be inspected under a microscope (see 3.2) for physical damage. |
The act of stiction often damages the heads or platters. If damage is found, a full head swap (3.3) is required. |
