9.2.4 Adaptive Scrubbing Schedule

Oracle Exadata System Software automatically inspects and repairs hard disks periodically when the hard disks are idle. The default schedule of scrubbing is every two weeks.

However, once a hard disk starts to develop bad sectors, it is better to scrub that disk more frequently because it is likely to develop more bad sectors. In release 12.1.2.3.0, if a bad sector is found on a hard disk in a current scrubbing job, Oracle Exadata System Software will schedule a follow-up scrubbing job for that disk in one week. When no bad sectors are found in a scrubbing job for that disk, the schedule will fall back to the scrubbing schedule specified by the hardDiskScrubInterval attribute.

If the user has changed the hardDiskScrubInterval to less than or equal to weekly, Oracle Exadata System Software will use the user-configured frequency instead of the weekly follow-up schedule even if bad sectors are found. See the ALTER CELL section in the Oracle Exadata System Software User's Guide for more information about scrubbing.

Minimum software required:

• Oracle Exadata System Software release 12.1.2.3.0

• Grid Infrastructure home:

  • 11.2.0.4.16 (April 2015) or higher

  • 12.1.0.2.4 (January 2015) or higher