IBM System/370 145 Manual page 215

The EREP program supplied with DOS Version 4 is a totally rewritten
version of the EREP program suppl.ied with DOS Version 3. This EREP
supports new functions and handle!s editing and printing of error records
contained in a SYSREC file that tRJras created by the RMSR routine, which
is also a new feature of DOS Vers:ion 4. The new EREP does not handle
error records written by DOS Vers:ion 3 MCAR, CCH, OBR, SDR, or MCRR
routines.
The DOS Version 4 EREP programl is self-relocating and system/310
model independent. It runs in the DOS Version 4 minimum batched
partition size of 14K. Additional storage provided in the partition is
used to improve the performance of EREP. The following facilities are
supported:
• Editing and printing of the entire contents of the SYSREC file
• Selective editing and printing of the SYSREC file or SYSREC history
tape contents Call MCAR records by CPU model, all CCH records by CPU
model, all unit check records for each I/O device, etc.)
• Editing and printing of tape lerror statistics records from the
SYSREC file or history tape
• Creation or updating of a taple-error-statistics-only history tape or
a SYSREC:history tape
• Summarization of tape error s1tatistics data from the tape error
statistics history file orth4e SYSREC file.
• Clearing of the SYSREC file
• summarization of selected device errors from the SYSREC file
This new version of EREP can bt~ initiated via the input stream or via
an operator command as could previo-qs versions.
CHECKPOINT/RESTART FACILITIES FOR DOS
Programs terminated because of an I/O device or channel error or as a
result of a system termination can be restarted from a checkpoint or
from the beginning of the job step if their job control is resubmitted
with the appropriate rest;.art
contl~ol
statements incI-uded.
Malfunctioning I/O devices can be removed from the table of available
devices by the operator, and diffE~rent devices of the same type can be
assigned to job steps via their job control or by the operator. Warm
start facilities are not required, since DOS does not build work queues.
CDOS POWER, which builds input anal output queues, does provide a warm
start facility.) DOS users should plan program and system restart
procedures.
50:15 REPAIR FEATURES
The programmed repair features supplied are designed to minimize the
impact of malfunction diagnosis an.d repair on system availability.
Fault location and repair time should be reduced by:
1. Improved error recording. Both intermittent and solid hardware and
I/O errors are logged at the time of failure if Model 145 RMS
routines are present. More status information is available than is
recorded for Models 30 and 40.
2. Online error diagnosis. Error diagnosis and repair can be performed
concurrently with system operation in a multiprogramming environment
A Guide to the IBM System/310 Mode.l 145
205