8F28A UNCORRECTABLE operation ERROR ON type DISK CYL xxx TRK yy
operation=READ or WRITE
type=INPUT or OUTPUT
Cause: Disk error recovery procedures were unable to correct an error encountered while
reading the input disk, writing the output disk or reading the VTOC from the output disk.
System Action: The job is canceled.
Programmer Action: none
Operator Action: The disk surfaces should be cleaned according to the instructions contained
in the manual pertaining to the particular pack or module. If the error persists, the Assign
Alternate Track utility should be run, which will flag the error track as defective and assign an
alternate track to replace it.
Used with Courtesy and Permission of International Business Machines, Inc.