DASD String Summary, Part 1

Provides information about the following:

Failure affect and usage data
Usage statistics
CPUs

The usage information in the DASD string summary can help you determine whether a failure affect reported in the DASD subsystem exception report is associated with just one device or is common to more than one device in the same controller string.

The report is useful in helping analyze error causes. It is used in conjunction with the DASD subsystem exception report.

The DASD STRING SUMMARY (1) includes units that report usage statistics. It shows the following:

Physical ID
Volume ID
Error types that are shown as equipment checks, seek errors, or data transfer errors
Thousands of accesses
Megabytes processed
Total number of seeks and megabytes processed for the report regardless of failure affect

Note: The MEGABYTES WRITTEN WITH VERIFY column is used for 3310s and 3370s that have write with verify commands.

Figure 1 shows an example of the DASD subsystem exception, part 2.

Figure 1. DASD String Summary, Part 1

DASD STRING SUMMARY (1)                          REPORT DATE  105 97
                                                 PERIOD FROM  100 97
                                                          TO  104 97
REPORT INCLUDES ALL DASD WITH PHYSICAL IDS OR A VALID DASDID
                                               ERROR TYPES       SEEK                  MEGABYTES
                                             EQU. ³SEEK ³DATA   ACCESSES   MEGABYTES   WRITTEN
SSID     SCU       CTLR     DEV     VOLUME   CHKS ³     ³XFER    X 1000      READ     W/VERIFY
***********************************************************************************************
           26       34                               1                         2 
           27       35
                             08     MX1RS1                            8         137
                             09     MX1DL1                                       66
           22       66.0
           23       60.1
                             02
                             02     RAS7C2      Y    Y     Y
                             03     RAS7C3      Y    Y     Y
           07       80
           23       80.1
                             02     RAS7C2      Y
                             03     RAS7D3                 Y
                             05     IBM355      Y
           03       A5
                             02     RAS712                           35          73
                             03     RAS713                           34          80
                             0C     RAS71C                           31          68
                             0E     RAS71E                           31          77
                             0F     RAS71F                           31          69
0004    10114.0     0F.0
        10114.2     0F.2
                             01     RAS841                           65           3
                             05     RAS845                           65           3
                             06     RAS846                           65           3
0041         .1     01.1
                             11     RAS291     Y
0243         .0     00
        HHGK6.0     00
                          ZZZ23-0F  SOQV04                          131         112
                          ZZZ23-0F  SOQV06     Y
1144         .0     00
        DBDMC.0     00
                          AH210-02  SLT221                                         2
                          AH210-02  SOQV01                            65           2
                          95122-14  SOQV19     Y
                          RM102-16  SOQV09     Y
                          GRAM9-17  SOQV31                 Y
                          95122-1E  SOQV21                 Y
                          *****-1F  SOQV13     Y
1144         .0     01
        DBDMC.0     01
                          GRAM9-10  SOQV03                            65         287
                          GRAM9-10  SOQV05     Y


ALL DASD PROCESSED FOR EXCEPTION REPORT                            1530         9325 3 
***********************************************************************************************

NOTE:  THE COUNTS FOR SEEK ACCESSES X 1000, MEGABYTES READ, AND
       MEGABYTES WRITTEN W/VERIFY ARE SIX DIGIT POSITIONS.  IF THE
       SPACE IS EXCEEDED, THE COUNT IS DIVIDED BY 1000 AND A K IS
       PLACED AT THE END OF THE NUMBER.  IF THE COUNT IS EXCEEDED
       WITH A K AT THE END, 99999K WILL BE PRINTED.

1

The failure affect for each unique combination of volume and physical ID belonging to every controller string that appeared on the subsystem exception report. A Y is placed in one or more of the columns under the ERROR TYPES heading to indicate which types of error have occurred. The following table shows failure affects and the error types:

FAILURE AFFECT	ERROR TYPE COLUMN WITH A Y
CTLR	EQU.CHKS
CTLR/DEV	EQU.CHKS
DEV	EQU.CHKS
SEEK	SEEK
DATAXFR	DATAXFER
DATAXFR(HDA)	DATAXFER
MULTIPLE	Any combination

2

The usage data for each volume/physical ID appears under three possible headings:

SEEK ACCESSES X 1000
MEGABYTES READ
MEGABYTES WRITTEN W/VERIFY

3

The usage statistics for all DASD processed for the subsystem exception report.

Note: To generate a DASD string summary, EREP needs valid physical IDs for the devices, relevant failure affect data from the exception report, or usage data for the selected devices. If these items are not present, the first part of the report is replaced by a message explaining the absence of report data.