IBM DTCA-24090 Hard Drive Specifications - Page 31

Reliability

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5.3 Reliability 5.3.1 Data Reliability Probability of not recovering data ....... 1 in 1013 bits read ECC implementation On-The-Fly correction, performed as a part of read channel function, recovers up to 9 symbols of error in 1 sector. (1 symbol is 8 bits.) Off-line correction, performed as a part of retry procedure in the drive, recovers up to 12 symbols of error in 1 sector. 5.3.2 Failure Prediction ( S.M.A.R.T.) DTCA-2xxxx supports S.M.A.R.T. function. The details are described in 10.6, "S.M.A.R.T. Function" on page 76 and 12.30, "S.M.A.R.T. Function Set (B0h)" on page 144. 5.3.3 Cable Noise Interference To avoid any degradation of performance throughput or error when the interface cable is routed on top or comes in contact with the HDA assembly, the drive must be grounded electrically to the system frame by four screws. The common mode noise or voltage level difference between the system frame and power cable ground or AT interface cable ground should be in the allowable level specified in the power requirement section. 5.3.4 Drive Usage Condition The drive is designed to be used under the following conditions. Within specifications of Shock, Vibration, Temperature, Humidity, Altitude, and Magnetic Field. ESD protective handling. Without covering breathing hole on top cover. Without pressing top cover. Less than 140 power-on hours per month. Seeking/Writing/Reading operation be less than 20% of power-on hours. The power requirements be satisfied. Drive frame be grounded electrically to the system through four screws. Mounting with recommended screw depth and torque. Interface physical and electrical requirements be satisfied per ATA-3. Power off sequence according to 5.3.6.2, " Required Power-Off Sequence" on page 24. Actual product life and failure rate depend on duty cycle and environmental conditions. Consult your IBM representative for reliability estimate if atypical operating conditions are anticipated. 5.3.5 Preventive Maintenance None. Specification 23

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5.3
Reliability
5.3.1
Data Reliability
Probability of not recovering data
.......
1 in 10
13
bits read
ECC implementation
On-The-Fly correction, performed as a part of read channel function, recovers up to 9 symbols of error
in 1 sector. (1 symbol is 8 bits.)
Off-line correction, performed as a part of retry procedure in the drive, recovers up to 12 symbols of
error in 1 sector.
5.3.2
Failure Prediction ( S.M.A.R.T.)
DTCA-2xxxx supports S.M.A.R.T. function.
The details are described in 10.6, “S.M.A.R.T. Function” on
page 76 and 12.30, “S.M.A.R.T. Function Set
(B0h)” on page 144.
5.3.3
Cable Noise Interference
To avoid any degradation of performance throughput or error when the interface cable is routed on top or
comes in contact with the HDA assembly, the drive must be grounded electrically to the system frame by
four screws.
The common mode noise or voltage level difference between the system frame and power cable
ground or AT interface cable ground should be in the allowable level specified in the power requirement
section.
5.3.4
Drive Usage Condition
The drive is designed to be used under the following conditions.
Within specifications of Shock, Vibration, Temperature, Humidity, Altitude, and Magnetic Field.
ESD protective handling.
Without covering breathing hole on top cover.
Without pressing top cover.
Less than 140 power-on hours per month.
Seeking/Writing/Reading operation be less than 20% of power-on hours.
The power requirements be satisfied.
Drive frame be grounded electrically to the system through four screws.
Mounting with recommended screw depth and torque.
Interface physical and electrical requirements be satisfied per ATA-3.
Power off sequence according to 5.3.6.2, “ Required Power-Off Sequence” on page 24.
Actual product life and failure rate depend on duty cycle and environmental conditions.
Consult your IBM representative for reliability estimate if atypical operating conditions are anticipated.
5.3.5
Preventive Maintenance
None.
Specification
23