IOS101I
DEVICE dev {FORCED OFFLINE | BOXED,} {text}

Explanation

text is one of the following:
  • RESERVE LOST
  • CANNOT RE-RESERVE
  • RESERVED ON FAILING PATH yy
  • RESERVE MAY BE LOST
  • MAY BE RESERVED ON PATH yy
  • ASSIGN LOST
  • CANNOT RE-ASSIGN
  • WAS RESERVED
  • WAS ASSIGNED
  • STILL RESERVED
  • STILL ASSIGNED
  • ASSIGNED ON FAILING PATH yy
An error occurred on the specified channel path when the system:
  • Reserved a device
  • Assigned a device
  • Was trying to reserve or release a device

Either the device is no longer reserved or assigned, or the system cannot use the channel path.

In the message text:
dev
The device number.
BOXED
The system boxed the device.
FORCED OFFLINE
The system forced the device offline.
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. When the system restarts other processors that share the device, these processors can access the device.
RESERVED ON FAILING PATH yy
The device is reserved on the failing channel path. Other processors that share the device cannot access it.
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.
MAY BE RESERVED ON PATH yy
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. 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 re-assign the device. When the system restarts other processors that share the device, these processors can assign the device.
WAS RESERVED or WAS ASSIGNED
The status of the device is no longer reserved or assigned.
STILL RESERVED or STILL ASSIGNED
The status of the device remains reserved or assigned.
ASSIGNED ON FAILING PATH yy
The device is still assigned on the failing channel path. Other processors that share the device cannot assign it.

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:
    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.

Operator response

If the system forced the device offline, do the following:
  • Consult your installation's operating procedures.
  • Enter a VARY dev,ONLINE command to bring the device online. Wait for the device to go entirely offline before doing so.
  • Contact hardware support.
If the system boxed the device, recover the device as follows:
  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. Contact hardware support.
  5. 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.
  6. Identify and recover failing tasks.

Source

Input/output supervisor (IOS)

Module

IOS

Routing code

2,10

Descriptor code

4

Parent topic: IOS messages