Hard Drive Degaussing Process — Step by Step

Step 1 — Prepare and identify

Before anything touches a machine, the media has to be identified. Skipping this is the most common cause of a disputed destruction record.

• Pull the media from the retirement queue and match it to the asset register entry.
• Record asset tag, serial number, capacity, media type and the data classification that was on it.
• Confirm the retention period has genuinely expired — degaussing data you are legally required to keep is a records problem, not a security win.
• Check whether the drive is subject to a lease, finance or warranty-return obligation before destroying it.
• Check whether it contains anything subject to legal hold.

Step 2 — Remove from service

• Power the server down properly and remove the drive. Never degauss a drive that is powered or spinning.
• Remove all data and power cabling. Retain any caddy, sled or bracket — the T-1.2 and T-1.5 drawers accept server drives with them still fitted.
• Where the drive is in a shared or multi-tenant system, confirm with the system owner that the data is genuinely no longer needed.
• Move the media to the controlled destruction area. Do not leave sanitised-but-not-destroyed media in a general scrap bin.

Step 3 — Degauss

1. Place the drive into the drawer (T-1, T-1.2, T-1.5) or feed it into the slot (T-4, T-5). The T-1.2 and T-1.5 drawers accept multiple full-size drives at once — batch them for throughput, but not beyond what the drawer is designed to hold.
2. Close the drawer. The interlock must engage; the machine will not pulse with the drawer open.
3. Confirm the machine's pre-cycle check passes. On the T-1.5 the "Go" indicator only appears when capacitor voltage, switch state and all other parameters are in tolerance — if it does not appear, the cycle has correctly been refused.
4. Run the cycle. Cycle times range from under 5 seconds on the T-1.5 to under a minute on the T-4.
5. Wait for the success confirmation on the LCD before removing the media.

Step 4 — Verify and record

Record, per asset, in the destruction register:

• Date, time and operator
• Asset tag and serial number
• Machine model and serial number
• The verification value — field strength on the T-1.2, T-1.5 or T-4; cycle status and running count on the T-5
• Custodian signature confirming this asset was the one destroyed

Do not batch-register. "20 drives destroyed, machine ran fine" is not evidence for any individual drive, and an auditor will say so.

Step 5 — Physically destroy

Degaussing makes the data unrecoverable. Crushing makes the object unreconstructable — which matters because a physical fragment of an undegaussed drive can sometimes yield data, and because a sanitised drive sold second-hand is a bad look in a customer's supply chain.

• PDS-30 — manual, 3-ton punch, up to 3 tons of force, 5 seconds or less. Also destroys tapes, phones and PCBs; the optional SSD kit adds flash.
• PDS-75 — NSA-listed manual crusher, bending the drive about 90° in 8 seconds or less.
• PDS-100 — NSA/CSS evaluated, automatic 8-second cycle with a manual crank handle if power fails. Best for volume; the rear output slide ejects drives straight into a bin.

Destroy tapes, SD cards and any other magnetic media the same way, or degauss and then destroy it.

Step 6 — Dispose of scrap

• Segregate destroyed media from general waste. A drive in a mixed waste bin is a finding in any audit.
• Label containers so media cannot re-enter the asset register.
• Hand the scrap to an authorised e-waste recycler under the E-Waste (Management) Rules, retaining the recycler's authorisation, weighment or receipt and the downstream chain documentation.
• Record the recycler reference against the batch in the destruction register.

Special case: failed drives

A meaningful share of retired drives are dead. They cannot be formatted, cannot be securely erased, and often defeat a shredder because of their construction. Degaussing handles them without any special procedure:

• Do not attempt any software erase on a drive that does not enumerate.
• Degauss it like any other drive. The electronics do not matter — the data is on the platter.
• If the drive's physical form prevents it from seating in the drawer, do not force it. The T-4 and T-5 slot models and the wider drawer on the T-1.2 and T-1.5 handle most irregular shapes; a drive that genuinely will not fit should be documented as an exception and destroyed by an alternative method.
• Record the exception in the register. Undocumented exceptions are exactly what auditors escalate.

Destruction register format

Sample rows only. We supply a printable register template with every machine, and an electronic version if you run batches centrally.

9. Common mistakes

• Destroying before degaussing. Crushing an undegaussed drive leaves recoverable fragments. This is the single most important error to avoid.
• Batch-registering. A register row per drive, not per batch.
• Leaving sanitised media in general waste. Segregate and label.
• Not verifying the machine. An unverified degausser can be producing false assurance for years.
• Forgetting flash. A degaussed drawer of drives and an untouched box of old SSDs is a very common gap.
• Forgetting tapes. Backup media, particularly off-site, is the most overlooked category.
• No training record. If your auditor asks who is authorised to operate the machine, "everyone in IT" is not an answer.