DASD MVS Attributes

The DASD MVS Attribute Group assists you in monitoring various z/OS error conditions collectively for a group of devices.

Cache Deactivated The count of volumes that are eligible for cache but do not have cache activated. Valid value is a 4-byte integer.

Dropped Ready The count of devices in this condition. The dropped ready condition may indicate a power supply or other hardware problems, or the switch may have been turned off at the device. Valid value is a 4-byte integer.

Indexed VTOC Lost The count of devices in this condition. Note that on heavily used volumes with many datasets, an index to a VTOC may significantly improve I/O performance. System routines at times may disable a VTOC index and return the VTOC to its non-indexed format. Use the DSF BUILDIX command to return to the VTOC to indexed format. If the problem persists, you may need to delete and rebuild the index using DSF. Valid value is a 4-byte integer.

Managed System A z/OS operating system in your enterprise a Tivoli OMEGAMON XE for z/OS agent is monitoring. Valid value is a character string with a maximum length of 32 bytes.

No Dynamic Path Reconnect The count of devices in this condition. Valid value is a 4-byte integer.

Not Responding The count of devices in this condition. When a device is not responding to I/O requests, start pending messages may appear on the system console. In multiple systems having shared DASD environments, this may be caused by a reserve issued by another system. If this is the cause of the problem, it may be possible to change the reserve to a global enqueue. If you cannot find the cause of any unknown reserves or enqueues, a hardware malfunction is possible, causing the device to show dropped ready. Valid value is a 4-byte integer.