Explanation
text is one of the following: - RESERVE LOST
- CANNOT RE-RESERVE
- STILL RESERVED
- RESERVE MAY BE LOST
- MAY BE RESERVED
- ASSIGN LOST
- CANNOT RE-ASSIGN
- STILL ASSIGNED
- SELF-DESCRIPTION RECOVERY
An error occurred on the last channel path to a device.
In
the message text:
- LAST PATH yy LOST
- The device was not reserved or assigned when the channel path
error occurred.
- dev
- The device number.
- RESERVE LOST
- The reserve status of the device is lost. Other processors that
share the device can access it.
- CANNOT RE-RESERVE
- The system removed the reserve status from the device. The system
stops other processors that share the device. The system could not
reserve the device again.
- STILL RESERVED
- The device is still reserved; other processors that share the
device cannot access it.
- RESERVE MAY BE LOST
- MAY BE RESERVED
- A reserve or release to the device was in progress over the specified
channel path when the channel path error occurred. The system did
not update the volume on the device.
For RESERVE
MAY BE LOST, the reserve status of the device may be lost. Other
processors that share the device may be able to access it.
For MAY
BE RESERVED, the device may still be reserved. Other processors
that share the device may not be able to access it.
- ASSIGN LOST
- The assign status of the device is lost. Other processors that
share the device can assign it.
- CANNOT RE-ASSIGN
- The system removed the assign status from the device. The system
stopped other processors that share the device. The system could not
reassign the device. When the system restarts other processors that
share the device, the processors can assign the device.
- STILL ASSIGNED
- The device is assigned. Other processors that share the device
cannot assign it.
- SELF-DESCRIPTION RECOVERY
- An error has occurred in a self-description recovery routine and
the system has boxed the device.
System action
The system forces the device offline, or boxes
the device, as follows:
- The I/O on the device is ended.
- Any new I/O requests result in permanent I/O errors.
- The system does not perform new allocations for the device.
- If the device was online, the system marks it pending offline.
A pending offline device goes offline when the following conditions
occur, in this order:
- The device is no longer allocated to any job.
- Allocation can get the necessary resources to process the request.
- If the device was offline, it remains offline.
Operator response
If the message text ends with
LAST PATH yy LOST,
do one of the following:
- If channel paths are available to the device, VARY them online.
- If no channel paths are available, and the device has a volume
that you can dismount, move the volume to an online device using the
DDR SWAP command.
- Enter the VARY DEVICE ONLINE command to bring the device online.
However, you must wait for the device to go entirely offline, since
it was pending offline.
If the system boxed the device, do the following:
- Vary the boxed device offline to all sharing systems.
- Isolate the failing control unit for repair.
- Determine the range of affected devices.
- Contact hardware support.
- Bring the device online to allow hardware support personnel to
verify the data on the boxed device. Do one of the following:
- Enter a DISPLAY UNITS command to see if the device is one of the
following:
- Offline and boxed (F-BOX)
- Allocated and boxed (A-BOX)
- If the device is offline and boxed, vary the device online by
entering the following command:
VARY dev,ONLINE
- If the device is allocated and boxed, display the using job steps
that are allocated to the device by entering the following command:
DISPLAY
U,,ALLOC,dev,1
Follow your installation's
procedures for unallocating using job steps.
Vary
the device offline, using the following command:
VARY dev,OFFLINE
Vary
the device online, using the following command:
VARY dev,ONLINE
- Verify the data on the volume.
- Identify and recover failing tasks.
Source
Input/output supervisor (IOS)
Module
Routing code
Descriptor code