User`s guide

INITIALIZE
Device
Decimal Number of
Segments in Directory
DL (RL01) 16
DL (RL02) 31
DM (RK06/07) 31
DU (Winchester disks) 31
DU (Diskettes) 1
RK (RK05) 16
The number of default segments in a directory depends on the size of the
volume. The next table shows the algorithm RT–11 uses for determining directory
segments.
Algorithm for Determining Number of Directory Segments
Device Block Size = s Default Number of Directory Segments
s 512
10
1
512
10
< s
2048
10
4
2048
10
< s 12288
10
16
10
s > 12288
10
31
10
/VOLUMEID[:ONLY]
/VOLUMEID writes a volume identification on a device when you initialize
it. This identification consists of a volume ID and an owner name. The
volume ID can be up to 12 characters long for a block-replaceable device and
up to 6 characters long for a magtape or interchange diskette when used with
/INTERCHANGE. The owner name can be up to 12 characters long for a block-
replaceable device and up to 10 characters long for a magtape.
If you use this option with /INTERCHANGE but you specify no volume ID, the
volume ID RT11A is automatically assigned.
The following example initializes volume DU1 and writes a volume identification
on it:
.INITIALIZE/VOLUMEID DU1:
DU1:/Initialize; Are you sure? Y
Volume ID? FORTRAN VOL
Owner? AJAX-CORP
/VOLUMEID:ONLY writes a new volume identification on a device without
reinitializing the device. However, this option does not work for magtapes; you
cannot change the volume ID of a magtape without initializing the entire tape.
RT–11 Command Descriptions 151