A fix is available
APAR status
Closed as program error.
Error description
If a tape drive returns an EIO error during an open, (gets hung or non responsive) and the tape drive is later removed from the system, ie: (rmdev -l rmt0) the system may crash later on when sysdumpdev -e command gets executed. If, after the above event, another device driver gets loaded, then this specifically sets up the conditions for the crash. The crash MAY be an ISI_PROC with an errpt entry such as: --------------------------------------------------------- ------------------ LABEL: ISI_PROC IDENTIFIER: 3BBD4751 Date/Time: Wed Mar 17 15:06:21 2010 Sequence Number: 59 Machine Id: 002B51CF4C00 Node Id: chicis09a Class: S Type: PERM WPAR: Global Resource Name: SYSVMM Description INSTRUCTION STORAGE INTERRUPT Probable Causes SOFTWARE PROGRAM Failure Causes SOFTWARE PROGRAM Recommended Actions IF PROBLEM PERSISTS THEN DO THE FOLLOWING CONTACT APPROPRIATE SERVICE REPRESENTATIVE Detail Data ISISR 0000 0000 0000 9032 SEGMENT REGISTER, SEGREG 0000 7FFF FFFF D000 ISSR0 6079 0000 4182 00B0 EXVAL 0000 0000 0000 000E --------------------------------------------------------- ------------------ The ISSR0 number may or may not match exactly the 60790000418200B0 it just so happens this has been the number in 5 cases to date. But the stack will definitely look like this: CRASH INFORMATION: CPU 0 CSA F00000002FF47600 at time of crash, error code for LEDs: 40000000 pvthread+015F00 STACK: WARNING: bad IAR: 60790000418200B0, display stack from LR: 006173EC [006173EC]dmp_size+0000EC (0000000000000004 [??]) [00616990]dmpioctl+000410 (??, ??, ??, ??) [004EAAE0]rdevioctl+0000C0 (??, ??, ??, ??, ??, ??) [0069E7C0]spec_ioctl+000080 (??, ??, ??, ??, ??, ??) [0054A890]vnop_ioctl+000050 (??, ??, ??, ??, ??, ??) [0055CCDC]vno_ioctl+00009C (??, ??, ??, ??, ??) [005E8F38]common_ioctl+0000F8 (??, ??, ??, ??) [00003850]ovlya_addr_sc_flih_main+000130 () [kdb_get_virtual_memory] no real storage @ 2FF22690 [D0123AB4]D0123AB4 () [kdb_read_mem] no real storage @ FFFFFFFFFFF6460 (0)>
Local fix
To prevent this crash, until a fix can be obtained, if a tape drive gets hung - do NOT remove it with rmdev command.
Problem summary
crash possible stack trace of: 006173EC dmp_size+0000EC (0000000000000004 ?? ) 00616990 dmpioctl+000410 (??, ??, ??, ??) 004EAAE0 rdevioctl+0000C0 (??, ??, ??, ??, ??, ??) 0069E7C0 spec_ioctl+000080 (??, ??, ??, ??, ??, ??) 0054A890 vnop_ioctl+000050 (??, ??, ??, ??, ??, ??) 0055CCDC vno_ioctl+00009C (??, ??, ??, ??, ??) 005E8F38 common_ioctl+0000F8 (??, ??, ??, ??) 00003850 ovlya_addr_sc_flih_main+000130 () kdb_get_virtual_memory no real storage @ 2FF22690 D0123AB4 D0123AB4 () kdb_read_mem no real storage @ FFFFFFFFFFF6460
Problem conclusion
Move component dump table function registration in stropen() to after all of the error processing, where the open has been determined to be successful.
Temporary fix
Comments
5300-09 - use AIX APAR IZ82757 5300-10 - use AIX APAR IZ82660 5300-11 - use AIX APAR IZ82738 5300-12 - use AIX APAR IZ81965 6100-02 - use AIX APAR IZ80439 6100-03 - use AIX APAR IZ80441 6100-04 - use AIX APAR IZ77002 6100-05 - use AIX APAR IZ80322 6100-06 - use AIX APAR IZ80609 6100-06 - use AIX APAR IZ80672 6100-06 - use AIX APAR IZ80609 7100-00 - use AIX APAR IZ81940
APAR Information
APAR number
IZ82660
Reported component name
AIX 5.3
Reported component ID
5765G0300
Reported release
530
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2010-08-11
Closed date
2010-08-11
Last modified date
2013-03-28
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
AIX 5.3
Fixed component ID
5765G0300
Applicable component levels
R530 PSY U837905
UP10/09/20 I 1000
PTF to Fileset Mapping
U837905 devices.scsi.tape.rte 5.3.10.1
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Document Information
Modified date:
28 March 2013