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(E) 2-1
SIR-3400H / SIR-3032i / SIR-3032W
2. Data Format and Basic Operations
2-1. Data Format
Data recorded to HDDs by the SIR-3400H is based on the FAT32 logical format. However, at the application
level the data is of the SIR dedicated format. This is outlined below.
Generally, recording and playback are performed by observing the HDD as sequential media.
BOM (Beginning Of Media) Position of beginning physical recording.
BOD (Beginning Of Data) User data is recorded from here.
EOD (End Of Data) Each time recording stops, an EOD is written.
When a recording is added, the previous EOD is overwritten and
deleted, and a new EOD is written at the location where the last
recording ended. Generally, data cannot be read after the EOD, even
if previously recorded data remains.
EOM (End Of Media) Last position where recording is physically possible.
ID number ID blocks are formed for each recording with ID numbers (001 to 999)
automatically assigned. These can be used for ID searches.
Increments
-Automatic-
. Start of each recording (including cancellation of recording
pauses)
. When the index number exceeds 99
-Manual-
. When the INDEX/ID key is pressed after the SHIFT key during
recording
INDEX number An index (01 to 99) can be added at desired locations during
measuring. By marking an index, the desired location can quickly be
found during analysis (INDEX search).
Increments
-Manual-
. When the INDEX/ID key is pressed during recording
Start ID This indicates the point where recording starts. The start ID is not actually
written on the recording media, but the position is registered in the TOC.
The start ID can be used for start ID searches.
TOC (Table of Contents) The position and other information for all ID blocks are recorded in table
format in this area.
Start of recording
Start IDStart ID
ID number increments
. SHIFT + INDEX/ID key
. When the INDEX number exceeds 99
INDEX number increment
. INDEX/ID key
BOM
BOD
INDEX01 INDEX99
ID001
EOM
ID002 ID003
ID004 ID999 Blank
T
O
C
EODTOC