IOS451I
IOS1451I dev, BOXED, text

Explanation

text is one of the following:
  • NO ONLINE OPERATIONAL PATHS
  • RESERVE LOST
  • ASSIGN LOST
  • DISBAND AND REGROUP PATH GROUP FAILED
The system validated a dynamic pathing device, because one of the following conditions occurred:
  • The system detected a malfunction associated with the device.
  • Either the operator or the system changed the state of one or more channel paths to the device.
In the message text:
dev
The device number.
NO ONLINE OPERATIONAL PATHS
Validation found that there are no online channel paths that can be used to access the device. This occurred for one of the following reasons:
  • Validation removed the last available online channel path.
  • Because of a channel path error, missing interrupt, or non-operational channel path condition, validation could not obtain data about the state of the channel path.
RESERVE LOST
Validation found that the device is not reserved to any channel path from this system.
ASSIGN LOST
Validation found that the device is not assigned to any channel path from this system.
DISBAND AND REGROUP PATH GROUP FAILED
Because of a channel path error, missing interrupt, or non-operational channel path condition, validation could not obtain data about the state of the channel path. The system could not remove the paths by rebuilding the dynamic path group.

System action

The system boxes the device, as follows:
  • The system ends I/O on the device.
  • New I/O requests result in permanent I/O errors.
  • The system performs no 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:
    1. The device is no longer allocated to any job.
    2. Allocation can get the necessary resources to process the request.
  • If the device was offline, it remains offline.

If the device is no longer allocated to a job, and if allocation processing allocates any device in the system, the system takes the device offline.

Operator response

To recover the boxed device, do the following:
  1. Vary the boxed device offline to all sharing systems.
  2. Isolate the failing control unit for repair.
  3. Determine the range of affected devices.
  4. Resynchronize dynamic path selection (DPS) array information for all affected devices.
  5. Contact hardware support.
  6. 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

    • If the device is allocated and boxed, but not offline, enter the following command:

      VARY dev,ONLINE,UNCOND

    • Verify the data on the volume.
  7. Identify and recover failing tasks.

Source

Input/output supervisor (IOS)

Module

IOSRSNDV

Routing code

2,10

Descriptor code

4

Parent topic: IOS messages