Reliability; Start/Stop Cycles; Data Reliability; Seek Errors - Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications

10.0 Reliability

10.1 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 the operating environment conditions specified in
"Enviornment" on page 36.

10.2 Data reliability

The probability of an uncorrectable data error is 10 in 1x10
The following ECC On-The-Fly (OTF) correction is implemented:
• 1 symbol = 8 bits
• 3 interleaves
• 18 symbols, 6 symbols per each interleave, for OTF correction This implementation always recovers 18 random burst
errors and a 144 bit continuous burst error.

10.3 Seek errors

A non-recoverable seek/ID miscompare error is defined as a seek operation that cannot be recovered by the error recovery pro-
cedure 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 1x 10
operated at the full range of voltage and environmental conditions.

10.4 Failure prediction (PFA/S.M.A.R.T)

A recoverable equipment error is an error other than a seek/ID miscompare 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
at the full range of voltage and environmental conditions.
Non-recoverable equipment errors indicate a defective drive.

10.5 Preventive maintenance

None.

10.6 Temperature warning

Temperature warning is enabled by setting the EWASC (Enable Warning additional sense code) bit to 1 and setting DEXCPT
(Disable Exception Control) bit to 0 in Mode Page 1C. For mode page settings, refer to Section 17.11.13, "Mode page 1C
(Informational exceptions control)" on page 152. The warning is issued as sense data (Sense Key 01h, Code 0Bh, Qual 01h).
The drive temperature is reported in Log Sense page 2F. Refer to Section 17.7.11, "Log Sense page 2F" on page 111.
16
Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
bits read.
8 8
READ, 10 WRITE, or 10
41
8
) when
6
SEEK operations when operated