Certified unit report
Unit U-489 · WDC WUH721818AL4200
Tested Nov 1, 2026 · Light Use · full serial on your in-box certificate
Warranty: 24 months from delivery
SMART healthPass
| Attribute | This unit | Our pass rule | |
|---|---|---|---|
| 5 · Reallocated sectors | 0 | must be 0 | |
| 197 · Pending sectors | 0 | must be 0 | |
| 187/198 · Uncorrectable errors | 0 | must be 0 | |
| Grown defect list | 0 | must be 0 | |
| 9 · Power-on hours | 12,781 | disclosed, never reset | |
| 12 · Power cycles | 18 | disclosed |
Capacity bytes18,000,207,937,536
InterfaceSAS 12Gb/s
Temperature c42
PassedYes
Extended self-testPass
ResultCompleted without error
Poh at test12,742
Nominal duration min2,060
Actual duration min1,560
Suspect protocol runNo
Measured benchmarkPass
Sequential read / write271 / 143 MB/s
Random 4k read / write205 / 599 IOPS
Runtime s per job60
Seq bs1M
Rand bs4k
Iodepth32
Odometer authenticityVerified
Vendor log cross-check passed: the drive's internal factory log agrees with its SMART hours. A wiped or rolled-back odometer would disagree. We run this check on every unit.
Methodselftest_log
Smart hours12,781
Secondary hours12,742
Delta hours39
AgreesYes
Data wipeComplete
Previous dataWiped · verified
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