The following report is an example of the report generated by the
ASMCHECK subcommand. Use this report to check the status of I/O requests
in the system. If the number of I/O requests received is greater than
the number of I/O requests completed by 10 or more, you may have a
hardware problem. In the example above the numbers are close enough
that no hardware errors are indicated.
If you think you might have a hardware problem, examine the status
of the paging device and check the logrec data set for hardware errors.
The following report is an example of ASMCHECK subcommand output
if
storage-class memory (SCM) is
used for paging:
ASM10000I ASMVT AT 00FE0A00
ASM10001I 52382 I/O REQUESTS RECEIVED, 52382 COMPLETED
ASM10006I 33935 NON-SWAP WRITE I/O REQUESTS RECEIVED, 33935 COMPLETED
ASM10000I ASMVX AT 0263A0B8
ASM10007I 17923 4K SCM I/O REQUESTS RECEIVED, 17923 COMPLETED
ASM10008I 16211 4K SCM WRITE REQUESTS RECEIVED, 16211 COMPLETED
ASM10009I 8 1M SCM I/O REQUESTS RECEIVED, 8 COMPLETED
ASM10010I 6 1M SCM WRITE REQUESTS RECEIVED, 6 COMPLETED
ASM10000I PART AT 024C1A10
ASM10002I PARTE AT 024C1A60: PAGE DATA SET 0 IS ON UNIT 02E6
ASM10002I PARTE AT 024C1AC0: PAGE DATA SET 1 IS ON UNIT 02E7
ASM10011I PARTE AT 0247ACCC: STORAGE-CLASS MEMORY
The following information appears in the report if
storage-class memory (SCM) is
used for paging:
- ASMVT AT aaaaaaaa
- The address of the ASM vector table (ASMVT).
- nnnn I/O REQUESTS RECEIVED
- The number of I/O requests received by ASM.
- NON-SWAP WRITE I/O REQUESTS RECEIVED
- The number of non-swap write I/O requests received by ASM.
- nnnn I/O REQUESTS COMPLETED BY ASM
- The number of I/O requests completed by ASM. If this number is
less than the number of requests received, then either ASM or IOS
was processing an I/O request at the time of the dump. This request
can be found in one of the three following places:
- In ASM waiting for PCCWs.
- In IOS waiting for I/O completion.
- In error retry waiting for redrive (errors on writes only).
- ASMVX AT aaaaaaaa
- The address of the ASM extension table (ASMVX).
- nnnnn nnnnK|M SCM I/O|WRITE
REQUESTS RECEIVED nnnnn COMPLETED
- The number, size, and type of SCM requests received and completed.
- PART AT aaaaaaaa
- The address of the paging activity reference table (PART).
- PARTE AT aaaaaaaa
- The address of the paging activity reference table entry (PARTE).
The following report is an example of ASMCHECK subcommand output
if
storage-class memory (SCM) is
not used for paging:
ASMVT AT 00FCFC10
4190 I/O REQUESTS RECEIVED, 4189 I/O REQUESTS COMPLETED BY ASM
PART AT 01C54470
PAGE DATA SET 0 IS ON UNIT E31
PAGE DATA SET 1 IS ON UNIT E31
I/O REQUEST ACTIVE FOR ABOVE DATA SET
IOSB FOR ABOVE HAD ABNORMAL IOSCOD VALUE X'51'
PAGE DATA SET 3 IS ON UNIT 450
PAGE DATA SET 4 IS ON UNIT 230
The following information appears in the report if
storage-class memory (SCM) is
not used for paging:
- ASMVT AT aaaaaaaa
- The address of the ASM vector table (ASMVT).
- nnnn I/O REQUESTS RECEIVED
- The number of I/O requests received by ASM.
- nnnn I/O REQUESTS COMPLETED BY ASM
- The number of I/O requests completed by ASM. If this number is
less than the number of requests received, then either ASM or IOS
was processing an I/O request at the time of the dump. This request
can be found in one of the three following places:
- In ASM waiting for PCCWs.
- In IOS waiting for I/O completion.
- In error retry waiting for redrive (errors on writes only).
- PART AT aaaaaaaa
- The address of the paging activity reference table (PART).
- PAGE DATA SET n IS ON UNIT ddd
- The location of each paging device. Request status and additional
information is also displayed, if applicable.