Learn the z/OS command to check the status of the first online DASD device. Get a detailed explanation of the D U,DASD,ONLINE,0000,1 command syntax and usage.
Table of Contents
Question
What command can be issued to determine the status of the first online DASD device?
A. D U,,ONLINE,100,1
B. D U,DASD,200,8
C. D U,DASD,ONLINE,0000,1
D. None of the above
Answer
The correct command to determine the status of the first online DASD device is:
C. D U,DASD,ONLINE,0000,1
Explanation
This command has the following syntax and meaning:
D – Display command
U – Unit device
DASD – Specifies that only DASD devices should be displayed
ONLINE – Shows only online devices
0000 – Starting device number
1 – Number of devices to display
So this command will display the status of 1 online DASD device starting from device address 0000.
The other options are incorrect because:
A) 100 is not a valid starting device number
B) 200,8 would display 8 devices starting at address 200
D) The given command is correct, so “None of the above” is wrong
Therefore, option C, “D U,DASD,ONLINE,0000,1”, is the correct z/OS command to determine the status of the first online DASD device. It provides a concise way to quickly check the status of a single DASD device.
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