www.vikingtechnology.com
Correction Rate
(UECC)
Number of errors corrected by RAISE
that cannot be fixed on-the-fly and
requires RAISE to correct. The
normalized value is only computed
when the number of bits in the
"BitsRead" count is in the range of
10^10 to 10^12. The count is cleared at
power on reset and when >10^12 bits
have been read.
Normalized Equation:
10log10(BitsRead/UECC + 1)
SectorsRead= Number of sectors read
SectorsToBits= 512*8
BitsRead= SectorsRead*SectorsToBits
Normalized Value Range:
Best = 100
Worst = 1
Invalid = 0
Raw Usage:
[3-0] : Number of sectors read
[6-4]: Soft ECC correction count
(UECC)
The Soft ECC Correction Rate
includes all uncorrectable ECC
(UECC) errors tracked by
the CONTROLLER. The
normalized equation for Soft
ECC Correction Rate is
logarithmic since the
valid BER range of the attribute
spans from 1.00E-10 to 1.00E-
12. To force positive numbers,
the numerator and denominator
are flipped. One is then added to
the number of errors in the
denominator to avoid a divide-
by-0 condition if no errors are
encountered. By taking the log of
the inverted BER and multiplying
by ten a reasonable range of
normalized values from 120 to
38 (representing a BER range of
1.00E-13 to 1.68E-04 ) are
presented. As defined this
attribute is identical to 195 and
201.
This Attribute reads ‘0’ until a
sample size between 10E10 and
10E12 is available to be tracked
Current state of drive operation based
upon the Life Curve, which is the Flash
Program-Erase Cycle usage schedule
defined for the drive’s warranty period
configured by Viking at manufacturing
time.
Normalized Equation: 100=usage does
not require throttling, 90=throttling
Normalized Value Range:
Best = 100 (positive wrt Life Curve)
Worst = 1 (throttling)
RawUsage: none
When no throttling is in effect,
this value reads 100. If the PE
Cycle usage trajectory threatens
to violate the Life Curve usage
schedule for the block that has
the minimum PE cycles left
unused, throttling commences
to forbid such violation; this
value reads 90 while throttling is
in effect.
If throttling is disabled, this value
reads 100 (i.e., throttling is not in
effect).
