Acoustics; Reliability - Seagate Decathlon 850 Product Manual

Decathlon 850 ATA Product Manual, July 1995
shock or vibration episode. When normal operating shock levels resume,
the drive meets its performance specifications.
Shock
5–22 Hz vibration
22–350 Hz vibration 0.50 Gs

1.11 Acoustics

Sound pressure is measured from 1 meter above the drive top cover at
idle.
Value
Sound pressure, typ (dBA)
Sound pressure, max (dBA)

1.12 Reliability

Read error rates are measured with automatic retries and data correction
with ECC enabled and all flaws re-allocated (88 bit Reed Solomon code
using 22 bit ECC span with 11 bit on-the-fly is used). Mean time between
failures (MTBF) is measured at nominal power at sea level and an
ambient temperature of 40 ° C.
Nonrecoverable read errors
Seek errors
Contact Start/Stop
MTBF
Service life
Operating Abnormal
2 Gs 10 Gs
0.020-inch 0.030-inch
displacement displacement
0.75 Gs
Idle Seek
30 dBA 34 dBA
34 dBA 38 dBA
13
1 per 10 bits transferred
7
1 per 10 physical seeks
40,000 cycles
300,000 power-on hours
5 years
11
Nonoperating
75 Gs
0.160-inch
displacement
4.00 Gs