Figure 22. Typical current wave form at start up of DJSA-232
6.4 Reliability
6.4.1 Data reliability
! Probability of not recovering data is 1 in 10
13
bits read.
! ECC implementation.
On-the-fly correction—performed as a part of read channel function—recovers up to 15 symbols of
error in 1 sector (1 symbol is 8 bits).
6.4.2 Failure prediction (S.M.A.R.T.)
DJSA-XXX supports Self-monitoring, analysis and reporting technology (S.M.A.R.T.) function. The details
are described in 11.7, "S.M.A.R.T. Function," on page 80 and 13.32, "S.M.A.R.T. Function Set (B0h),"
on 159.
6.4.3 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 require-
ment section.
Travelstar 32GH/30GT/20GN hard disk drive specifications
28
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