Installation guide

start
This command issues a SCSI Start Unit command to the selected
device. This action enables the selected device to allow media access
operations.
stop
This command issues a SCSI Stop Unit command to the selected
device. This action disables the selected device from allowing media
access operations.
tur
This command issues a Test Unit Ready command to determine the
readiness of a device. If the command detects a failure, it
automatically reports the sense data.
verify media [
test-parameters ]
This command performs verify operations on the selected device.
The media argument verifies the data written on the device media.
This activity involves reading and performing an ECC check of the
data. If the test parameters are omitted, the entire device media is
verified.
If the device does not support the verify command, the following
error message appears:
scu>verify media starting 1000 length 1024
Verifying 1024 blocks on /dev/rrz10c (RX23),
please be patient...
Verifying blocks [ 1000 through 2023 ] ...
scu: Sense Key = 0x5 = ILLEGAL REQUEST -
Illegal request or CDB parameter,
Sense Code/Qualifier = (0x20, 0) =
Invalid command operation code
When an error occurs, the sense key is examined. The expected sense
keys are Recovered Error (0x01) or Medium Error (0x03). When these
errors are detected, the following error message is displayed and
verification continues with the block following the failing block:
scu: Verify error at logical block number 464392 (0x71608).
scu: Sense Key = 0x1 = RECOVERED ERROR -
Recovery action performed,
Sense Code/Qualifier = (0x17, 0) = Recovered data with no
error correction applied
If any other sense key error occurs, the full sense data is displayed
and the verification process is aborted.
The following conditions apply to the verify command:
B–8 SCSI/CAM Utility Program