DOWN

Operation Notes

When the DOWN command is issued for a device that is in use, the request is responded to when the process currently accessing it releases the device.

The system console cannot be taken down. Any attempt to do so results in the following error message:

 DOWN NOT PERFORMED ON CONSOLE DEVICE (CIERR 3150)

	CAUTION: When any device is powered down without the use of the DOWN command, subsequent access to that device can result in indefinite waiting, erroneous transfers, or other incorrect operation. Often these failures occur with no indication to the system operator or to the user. For this reason, it is very important that every device that is not fully operational (especially those that are powered down) be taken down with the DOWN command. A device that will be inoperable for more than a few hours can be temporarily removed from the I/O configuration at system startup.

Use

This command may be issued from a session, job, program, or in BREAK. Pressing Break has no effect on this command. It may be used only from the console unless distributed to users with the ALLOW or ASSOCIATE command.

Example

To take logical device number 7 offline, enter:

 DOWN 7

To take logical device number 10 (an input-spooled, job-accepting magnetic tape) offline, enter:

 DOWN 10
 STOPSPOOL 10
 11:16/31/SP#10/STOPPED
 11:16/31/LDEV#10 NOT READY