IBM IC35L036UWDY10 Hard Drive Specifications - Page 50

reliability, 6.5 Failure prediction PFA/S.M.A.R.T.

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7.6 Reliability 7.6.1 Start/stop cycles The drive is designed to withstand a minimum of 50,000 start/stop cycles at ambient environment. The drive is designed to withstand a minimum of 10,000 start/stop cycles at operating environment conditions specified on page 30. 7.6.2 Data reliability The probability of uncorrectable data error rate is 10 in 1x1016 bits read. The following ECC on the fly correction is implemented: ! 1 Symbol : 8 bits ! 3 Interleave ! 15 Symbols, 5 symbols per each interleave, for on the fly correction. This implementation always recovers 5 random burst errors and a 113 bit continuous burst error. 7.6.3 Seek/ID miscompare errors A non-recoverable seek/ID miscompare error is defined as a seek operation that cannot be recovered by the error recovery procedure of the drive. The drive reports sense key 04 and sense code 02 for this error. No drive has more than one non-recoverable seek/ID miscompare error per 100 million seek operations (1 in 1x108) when operated at the full range of voltage and environmental conditions. 7.6.4 Equipment errors A recoverable equipment error is any error other than a seek/ID mis-compare error or read error that is detected and corrected by the drive error recovery procedure. Examples are Write Fault, Drive Not Ready and internal drive errors. No drive has more than one recoverable equipment error per 108 read, 108 write or 10 6 seek operations when operated at the full range of voltage and environmental conditions. Non-recoverable equipment errors indicate a defective drive. 7.6.5 Failure prediction (PFA/S.M.A.R.T.) The drive supports Informational Exceptions Control Page (1C) defined in the SCSI-3 Parallel Interface Standard. The function enables the drive to report sense codes of FAILURE PREDICTION THRESHOLD EXCEEDED to the host system. The Mode page 1C specifies enable/disable, reporting method, and report count. If the drive exceeds the failure prediction threshold, the drive returns Check Condition on any command. Per the specified reporting method in Mode Page 1C, 0/5D/00, 1/5D/00, or 6/5D/00 as sense key/code/ qualifier is then sent to the host as a response of Request Sense command. As the default the function is enabled but no reporting of informational exception condition is made. The details are described in Section 8.8.13, "Mode Page 1C (Informational Exceptions Control)" on page 111. 7.6.6 Preventive maintenance None. Ultrastar 146Z10 hard disk drive specifications 34

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7.6
Reliability
7.6.1 Start/stop cycles
The drive is designed to withstand a minimum of 50,000 start/stop cycles at ambient environment.
The drive is designed to withstand a minimum of 10,000 start/stop cycles at operating environment
conditions specified on page 30.
7.6.2 Data reliability
The probability of uncorrectable data error rate is 10 in 1x10
16
bits read.
The following ECC on the fly correction is implemented:
!
1 Symbol : 8 bits
!
3 Interleave
!
15 Symbols, 5 symbols per each interleave, for on the fly correction.
This implementation always
recovers 5 random burst errors and a 113 bit continuous burst error.
7.6.3 Seek/ID miscompare errors
A non-recoverable seek/ID miscompare error is defined as a seek operation that cannot be recovered by
the error recovery procedure of the drive.
The drive reports sense key 04 and sense code 02 for this
error.
No drive has more than one non-recoverable seek/ID miscompare error per 100 million seek operations
(1 in 1x10
8
) when operated at the full range of voltage and environmental conditions.
7.6.4 Equipment errors
A recoverable equipment error is any error other than a seek/ID mis-compare error or read error that is
detected and corrected by the drive error recovery procedure. Examples are Write Fault, Drive Not Ready
and internal drive errors.
No drive has more than one recoverable equipment error per 10
8
read, 10
8
write or 10
6
seek operations
when operated at the full range of voltage and environmental conditions.
Non-recoverable equipment errors indicate a defective drive.
7.6.5 Failure prediction (PFA/S.M.A.R.T.)
The drive supports Informational Exceptions Control Page (1C) defined in the SCSI-3 Parallel Interface
Standard. The function enables the drive to report sense codes of FAILURE PREDICTION THRESHOLD
EXCEEDED to the host system. The Mode page 1C specifies enable/disable, reporting method, and
report count.
If the drive exceeds the failure prediction threshold, the drive returns Check Condition on any command.
Per the specified reporting method in Mode Page 1C, 0/5D/00, 1/5D/00, or 6/5D/00 as sense key/code/
qualifier is then sent to the host as a response of Request Sense command.
As the default the function is enabled but no reporting of informational exception condition is made.
The details are described in Section 8.8.13, "Mode Page 1C (Informational Exceptions Control)" on
page 111.
7.6.6 Preventive maintenance
None.
Ultrastar 146Z10 hard disk drive specifications
34