User Guide

Ampex 1308911-02 E-7
Statistics Operational Statistics Parameters 2 (Log Page
1. Physical Blocks (PB) and Physical Block Double Frames (PBDF). Data for recording of a PB
is usually received by the MSR just once, and is recorded to tape as a PB just once. There may
be several attempts required by the MSR to do so, all resulting in the recording of PBDFs. When
the last attempt is successful according to the rewrite criteria, the data received by the MSR has
been recorded as a single PB to tape. A recorded PB is included in the number of recorded
PBDFs. To retrieve data from a recorded PB, the MSR may have to read several PBDFs, of
which the last one only contains the data returned to the MSI for a successfully retrieved PB.
When this last PB cannot successfully be played back, it is counted as an unsuccessful PB
playback, unless this last PBDF was not a properly recorded PB. Statistics for PBDFs read,
other than for the PB retrieved, are commonly ignored, since problems with these PBDFs were
already detected during the preceding record attempts.
80 PBDF Re-writes Triggered by Channel 2
81 Reserved
82 C1 Generated Erasures During Unsuccessful PB Reads, Channel 2
1
83 C2 Generated Erasures During Unsuccessful PB Reads, Channel 2
1
84 Reserved
85 Mass Storage Recorder (MSR) Failures With Subsequent
MSR Status Request
86 MSR Failures Without Subsequent MSR Status Request
87 Unsuccessful Automatic Self-test Operations - Self-tests are defined as
tests that are initiated by the PCF itself, at power up or after the Electronics
has been reset.
88 Unsuccessful Diagnostic Commands - Diagnostics are defined as tests that
are run as a result of a Diagnostic Built-in Test command.
89 Head P1 Error Counts During PBDF Records
6
90 Head P2 Error Counts During PBDF Records
6
91 Head P3 Error Counts During PBDF Records
6
92 Head P4 Error Counts During PBDF Records
6
93 Head P1 Error Counts During PBDF Playbacks
6
94 Head P2 Error Counts During PBDF Playbacks
6
95 Head P3 Error Counts During PBDF Playbacks
6
96 Head P4 Error Counts During PBDF Playbacks
6
97 Reserved
98 Reserved
Table E-3. Electronics Operational Statistics 2 Log Parameters – Log Page 33h (Continued)
Parameter
Code
Description