When you start ISRDDN, the Current Data
Set Allocations list displays, as shown in Figure 1.
On the right side of the display is a list of ddnames and their
associated data sets. The list of data sets can also contain indicators
of DUMMY allocations, subsystem files, or allocations to the terminal.
The ddname is shown in white, unless the first data set in the concatenation
is scrolled off the top of the screen. If the first data set in a
concatenation is not on the screen, the ddname is shown in yellow.
In the center of the display is a column of 1-character input fields,
preceded by greater-than signs (>). These input fields are used
for line commands such as E for Edit and I for Information. For
data set with an XTIOT, this input field may be unavailable if XTIOT
support is not enabled in the ISPF configuration table. Data sets
with an XTIOT have the data set name displayed in yellow. A column
with a heading of X is displayed next to the ENQW column. A value
of Y is displayed in this column if the data set has an XTIOT. This
column is shown in Figure 3.
The left side of the display contains columns of information about
individual data sets. When you scroll right or left, the left side
of the screen changes. Initially, the left side of the screen contains
the volume name and disposition. If the disposition is red, there
are other jobs waiting to use this data set as shown. You can use
the Q line command to see what jobs are waiting. You can view the
VTOC information for a volume by placing the cursor on the volume
name and pressing the Enter key.
ISRDDN automatically checks for mixed concatenations when it is
started. If you have concatenations of mixed data set types or formats,
you are shown a message to that effect when you press the Enter key
or scroll the first time. ISRDDN also checks for mixed concatenations
when you use the RESET command.
If you scroll right once, you see the attributes of each data set,
as shown in Figure 2.
For some types of allocations, such as subsystem allocations, you
might see different information. If you have mixed concatenations,
a message with this information appears when you press the Enter key
or scroll the first time. You can suppress this message for future
innovations of ISRDDN by using the CHECK OFF command.
If you scroll right a second time, you see information that includes
whether the ddname is open and if so, by how many active DCBs, as
shown in Figure 3.
You also see the indicator *SMS* if the data set
is SMS-managed, and information about jobs waiting on the resource.
For JES files you might see additional information such as the class
and the writer name.
Some primary commands, MEMBER and COUNT, for example, put messages
in a fourth status screen (Figure 4).
If messages exist and you scroll right again, you see the messages.
The message screen is only shown if messages exist. If messages do not exist,
a third scroll to the right returns you to the initial screen.