Specifications

Troubleshooting Resources 4–41
Checking Unit Status and I/O Activity
Use the cache display to see the status and I/O activity for the logical units configured on
the controller (see Figure 4–3). Table 4–13 lists the heading and contents for each column
of the device status region.
Figure 4–3. Sample unit status on the cache display
RdKB/S Average data transfer rate from the devices on the port (reads) during the last update
interval.
WrKB/S Average data transfer rate to the devices on the port (writes) during the last update
interval.
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.
VTDPY> DISPLAY CACHE
HSG80 S/N: ZG92712820 SW: SSDRS-0 HW: E-06
58.1% Idle 878 KB/S 787 Rq/S Up: 0 22:10:28
Unit ASWC KB/S Rd% Wr% Cm% HT% PH% MS% Purge BlChd BlHit
P0300 o 0 0 0 0 000000
D0303 o^ b 0 0 0 0 000000
D0304 0 0 0 0 000000
P0400 0 0 0 0 000000
P0401 0 0 0 0 000000
D0402 x^ b 0 0 0 0 000000
Table 4–13 Unit Status Columns
Column Contents
Unit Kind of unit (and its unit number):
D = disk drive or CD-ROM drive
P = passthrough device
? = unknown device type
Table 4–12 Device-Port Status Columns (Continued)
Column Contents