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EMC Symmetrix DMX-3 Product Guide
Mainframe Features and Support
Note: This control statement may require an operator response to permit
purging of datasets on the volume. Refer to the IBM ICKDSF User's Guide and
Reference for more information.
All data remaining on the tracks operated on by this control
statement will be DESTROYED. Restore the data from your most
recent backup. Using any other means to reallocate data will affect
data integrity.
Enter the following ICKDSF control statement to reassign the
defective tracks:
INSPECT UNIT(ccuu)|SYSNAME(sysxxx)|
DDNAME (ddname)
DEVTYPE(3380/3390) VERIFY (serial) NOPRESERVE NOASSIGN
NOMAP -
TRACKS((cyl,head),...)
Specify the desired (cyl,head) in decimal notation, or as
(
X'cyl',X'head') if hex notation is desired.
Overrun errors and equipment checks
When an overrun or equipment check is detected, the host system
retries the operation. If the operation is successful on the retry, the
error is recorded as recoverable. If the retry is unsuccessful, the error
is recorded as unrecoverable.
Error reporting
The Symmetrix system reports error conditions to the host and to the
EMC Customer Support Center through its Autocall feature. The
Symmetrix system presents a unit check status in the status byte to
the channel whenever it detects an error condition such as a data
check, command reject, overrun, or equipment check.
Unit check status The Symmetrix system also presents a unit check status
(environmental-data present) whenever it detects an environmental
violation. The Symmetrix system runs a series of internal tests on its
components at least once every 24 hours and monitors critical
components continuously. It also runs these tests when initially
powered up or when a software re-set has occurred. These tests check
for a low battery charge or AC power failure, or redundant
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