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000-221 · Question #132

The following information has been reported in an AIX error log: How can the administrator prevent the error from reoccurring?

The correct answer is C. Increase "/var" file system to ensure it has a minimum of 266MB free space. The AIX error indicates the system dump target in /var lacked sufficient free space to write a dump. Expanding /var resolves the space shortage that caused the error.

Troubleshooting and Problem Determination

Question

The following information has been reported in an AIX error log:

How can the administrator prevent the error from reoccurring?

Exhibit

000-221 question #132 exhibit

Options

  • ACreate a secondary dump device greater than 266MB
  • BIncrease primary dump device size greater than 266MB
  • CIncrease "/var" file system to ensure it has a minimum of 266MB free space
  • DIncrease "/var/adm/ras/livedump" file system to ensure it has a minimum of 266MB free space

How the community answered

(30 responses)
  • A
    3% (1)
  • B
    3% (1)
  • C
    83% (25)
  • D
    10% (3)

Why each option

The AIX error indicates the system dump target in /var lacked sufficient free space to write a dump. Expanding /var resolves the space shortage that caused the error.

ACreate a secondary dump device greater than 266MB

Creating a secondary dump device does not resolve insufficient space in the filesystem where the primary dump target resides.

BIncrease primary dump device size greater than 266MB

The primary dump device size setting does not directly free up filesystem space in /var; the underlying filesystem must have room for the dump file.

CIncrease "/var" file system to ensure it has a minimum of 266MB free spaceCorrect

When the primary dump device is configured as a file under /var (such as /var/adm/ras/sysdump), AIX requires enough free space in the /var filesystem to hold the dump image. If /var has less than the required space (266MB in this case), the dump fails with a logged error, and increasing /var free space prevents recurrence.

DIncrease "/var/adm/ras/livedump" file system to ensure it has a minimum of 266MB free space

/var/adm/ras/livedump is used for live dump captures, which is a separate facility from the system crash dump mechanism involved here.

Concept tested: AIX system dump device and /var space requirement

Source: https://www.ibm.com/docs/en/aix/7.3?topic=management-system-dump-facility

Topics

#system dump#/var filesystem#dump device#error log analysis

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