Tape Volume Statistics Summary

This report provides an easy-to-use list of volumes with exceptions. It is useful in finding the media that is causing problems.

It is generated whenever a volume is listed on the tape subsystem exception report; therefore, only volumes that have permanent errors or have failed the temporary error limits are listed.

All the activity for every volume listed as an exception on the tape subsystem exception report as well as errors against the unit addresses (shown in the DEVNO⁄CUA statistics summary reports) is shown in chronological order. Entries are grouped by volume serial and listed in order of occurrence.

The report shows:
Note: This can be used to find a device that generates volumes which cause problems when used on other devices.

Erase gaps indicate the following sequence has occurred:

  1. A write error has occurred.
  2. The tape has been repositioned for the retry.
  3. The second attempt also detected an error.
  4. The tape has been repositioned again.
  5. A section of tape is erased and the write operation is retried again.
Note: Excessive write erase gaps indicate a problem with a cartridge or a drive.
Figure 1 shows an example of the tape volume statistics summary.
Figure 1. 3490 Volume Statistics Summary
3490 VOLUME STATISTICS SUMMARY                    1 REPORT DATE 067 97
                                                    PERIOD FROM 051 97
                                                           TO   051 97

            VOLUMES FAILING LIMITS OR PERMANENT ERRORS
          2 CURRENT LIMITS               TEMP WRT(CT)  TEMP RD(CT)
              MBYTES/ERR      VOLUME          40 ( 3)     200 ( 1)
                                                                                                  14         15    16 
                                   8                                               12 
     17 
  3      4        5      6    7   R   9           10                 11 
    READ   13 
VOLUME  DATE     TIME   CHP DEVNO W BLOCK ----MB/ERR PERM--- ----MB/ERR TEMP---- RECVY ERASE  -BLKS PROC-    BLK   --JOB--- P
SERIAL DAY YR  HH:MM:SS -ID  /CUA E  ID   READ(CT) WRITE(CT) WRITE(CT)  READ(CT) ACTNS GAPS   READ  WRITE    LEN   --NAME-- U

B07146 051 97  18:48:31  00   5A2         -- (  0) --  (  0)  -- (  0)  -- (  0)     3     0   6144  6144   0000            E

B42750 051 97  15:34:33  00   5BC         -- (  0) --  (  0)  -- (  0)   0 (  1)     0     0      0     0   0000            E

M11407 051 97  20:51:24  06   5A3 O 001BF -- (  0) --  (  0)  -- (  0)  -- (  0)     0     0      0     0   2EE4  C4KCC33E  E
M11407 051 97  20:57:53  00   5A3   001BF -- (  0) --  (  0)  -- (  0)  -- (  0)     0     0      0   256   0000            E
M11407 051 97  21:07:11  00   5A1   001C5 -- (  0) --  (  0)  -- (  0)  -- (  0)     0     0      0     0   0000

TAPENO 051 97  22:16:18  22   5A7         -- (  0) --  (  0)  -- (  0)  -- (  0)     0     0      0     0   0000   EOX EXIT E
TAPENO 051 97  22:16:37  22   5A7 O       -- (  0) --  (  0)  -- (  0)  -- (  0)     0     0      0     0   0050   OPERX    E
TAPENO 051 97  22:18:40  22   5A7         -- (  0) --  (  0)  -- (  0)  -- (  0)     0     0      0     0   0000   EOS EXIT E

L30570 051 97  19:03:22  22   5A5 W       -- (  0) --  (  0)   3 (  1)  -- (  0)     0     0      0  5934   0234   EOS EXIT E

L27530 051 97  20:31:22  06   5A2 W       -- (  0) --  (  0)   5 (  1)  -- (  0)     0     0      0 10120   0256   EOS EXIT E

L70630 051 97  16:24:33  06   5A4         -- (  0) --  (  0)  -- ( 12)  -- (  0)     0     0      0  9050   1250   EOS EXIT E

L72930 051 97  11:22:19  22   5B2         -- (  0) --  (  0)  -- (  0)  39 (  1)     0     0  20302     0   2350   EOS EXIT E

B35790 051 97  19:22:13  22   5A3 E       -- (  0) --  (  0)  -- (  0)  -- (  0)     0     0      0     0   0000            E



      COLUMN TOTALS:                         (  0)     (  0)     ( 14)     (  2)  (  3)  (  0)


             TOTALS:     MOUNTS =       9
             TOTALS:     MEGABYTES PROCESSED =   201
 18 
CPU MODEL  SERIAL NUMBER
 A   3081    210819
 B   3081    010819
 1 
REPORT DATE is the Julian date the report ran.

PERIOD FROM is the Julian date of the earliest record.

PERIOD TO is the Julian date of the latest record.

 2 
CURRENT LIMITS (MB/ERR) is the megabyte per temporary error limit threshold from the limit control cards. For details on using the LIMIT statement, see .
 3 
VOLUME SERIAL is the volume serial number.
 4 
DATE DAY YR is the Julian date and year from the OBR or MDR record.
 5 
TIME is the time from the OBR or MDR record.
 6 
CHP-ID is the channel path ID (used in XA mode) and only appears if all errors have occurred on 1 CHP-ID.
 7 
DEVNO/CUA is the device number in XA mode or the primary control unit address (PCUA).
 8 
R/W/E defines the type of permanent error as a read, write, or equipment check.
 9 
BLOCK ID is the logical block position for permanent errors.
 10 
MB/ERR PERM
  • READ is the average number of megabytes read per permanent read error.
  • CT is the total count of all permanent read errors.
  • WRITE is the average number of megabytes written per permanent write error.
  • CT is the total count of all permanent write errors.
 11 
MB/ERR TEMP
  • READ is the average number of megabytes read per temporary read error.
  • CT is the total count of all temporary read errors.
  • WRITE is the average number of megabytes written per temporary write error.
  • CT is the total count of all temporary write errors.
 12 
READ RECVY ACTNS is the total count of recoverable read errors detected during 3490 read error recovery.
 13 
ERASE GAPS is the number of times a block is rewritten during error recovery for the listed volumes.
 14 
BLKS PROCESSED
  • READ is the total number of blocks read for a volume that has had at least one temporary, but no permanent, errors.
  • WRITE is the total number of blocks written for a volume that has had at least one temporary error, but no permanent errors.
 15 
BLK LEN is the block length as taken from the OBR record for any listed volume that had permanent errors.
 16 
JOB NAME is the job name from the OBR record for any listed volume that had permanent errors.
 17 
CPU identifies the host processor reporting the exception.
 18 
CPU, MODEL, SERIAL, NUMBER further identifies the CPU listed in the error summary lines of this report.
Parent topic: Tape Subsystem Exception