Technical data

4–50 Troubleshooting
Checking Device-Port Status and I/O Activity
The device-port status region of the device display (lower left) shows the I/O
characteristics for the controller’s device ports. Table 4–12 lists the heading and
contents for each column of the device-port status region.
RdKB/S Average data transfer rate from the device (reads) during the last update
interval.
WrKB/S Average data transfer rate to the device (writes) during the last update
interval.
Que Maximum number of I/O requests waiting to be transferred to the device
during the last update interval.
Tg Maximum number of requests queued to the device during the last update
interval. If the device doesn’t support tagged queuing, the maximum value is
1.
CR Number of SCSI command resets that occurred since VTDPY was started.
BR Number of SCSI bus resets that occurred since VTDPY was started.
TR Number of SCSI target resets that occurred since VTDPY was started.
Table 4–11 Device Status Columns (Continued)
Column Contents