IOSB Contents shows the I/O status block (IOSB) for all disk
device QIO functions except sense mode.
IOSB Contents for the Sense Mode Function shows the I/O status block for the sense mode function.
I/O Function Codes lists the status messages
for all functions and devices. (The OpenVMS system messages documentation
provides explanations and suggested user actions for these messages.)
Figure 7 IOSB Contents
The byte count is a 32-bit integer that gives the actual number
of bytes transferred to or from the process buffer.
Figure 8 IOSB Contents for the Sense Mode Function
The second longword of the I/O status block for the sense
mode function returns information about the cylinder, track, and
sector configurations for the particular device.
HP OpenVMS I/O User's Reference Manual
Disk Drivers
