IBM Updates Required for MAS in an MTL Environment

Symptom

Attempting to vary on more than one MTL device. The first MTL device will vary online but all subsequent devices will fail with the above error message.

Resolution

IBM has acknowledged that this is erroneous behavior by MVS, in APAR number OA03749.

Symptom

This problem will occur if the MAS's channel adapter serial number changes after MVS has varied on the device at least once. The MAS's serial number would change if the MAS and/or channel adapter is replaced. Note that this is not an issue with the MAS, per se, but applies to any MTL device attached to MVS.

Resolution

IBM has acknowledged that this is erroneous behavior by MVS, in APAR number OA06698.

Symptom

This problem will only affect OAM users.
In the Bus-Tech MAS environment, automated mounts are canceling faster than an actual operator would be able to cancel the mounts. The problems that may result when too many automated cancels occur include:
Performance issues, or error message CBR6405D - mount time-outs.

Resolution

IBM has acknowledged that this is erroneous behavior by MVS, in APAR number OA07945.

Symptom

This will only affect OAM users also using MTL.
The tape volume capacity may not reflect the esoteric defined tape capacity as defined in the SETOAM TAPECAPACITY parameter. The tape capacity will default to the value of 874218 for enhanced capacity media.

Resolution

IBM has acknowledged that this is erroneous behavior by MVS, in APAR number OA08963.