Product manual

Byte 0
The page code is the code assigned to an attribute the drive
monitors. It specifies the log page that is being transferred.
The page codes the drives support are listed and described
below:
Page Description
02
H
Error Counter Page (Write)
03
H
Error Counter Page (Read)
05
H
Error Counter Page (Verify)
06
H
Nonmedium Error page
37
H
Cache Statistics page
Parameter codes 00
H
through 06
H
specify six counters each for write,
read and verify errors (18 counters). A description of the type (category
of error) counters specified by codes 00
H
through 06
H
are described
below.
Parameter Code 00
H
—
Error Corrected Without Substantial Delay
. An
error correction was applied to get perfect data (also known as ECC
on-the fly).
Without Substantial Delay means the correction did not
postpone reading of later sectors (that is, a revolution was not lost). The
counter is incremented once for each logical block that requires correc-
tion. Two different blocks corrected during the same command are
counted as two events.
Parameter Code 01
H
—
Error Corrected with Possible Delays . An error
code or algorithm (that is, ECC, checksum) is applied to get perfect data
with substantial delay.
With Possible Delays means the correction took
longer than a sector time so that reading/writing of subsequent sectors
was delayed (that is, a lost revolution). The counter is incremented once
for each logical block that requires correction. A block with a double error
that is correctable counts as one event and two different blocks corrected
during the same command count as two events.
Parameter Code 02H—
Total (rewrites or rereads) .This parameter code
specifies the counter counting the number of errors that are corrected by
applying retries. This counts errors recovered, not the number of retries.
If five retries are required to recover one block of data, then one is added
to the counter, not five. The counter is increased once for each logical
block that is recovered using retries. If an error is not recoverable while
applying retries and is recovered by ECC, it is not counted by this counter;
it is counted by the counter specified by parameter code 01
H
—Error
Corrected with Possible Delay.
78 Medalist Pro 2160N/2160WC Product Manual, Rev. A