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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

1 2 ... 142 143 144 145 146 147 148 149 150 151 152 ... 295 296

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