Oracle Linux 5 system reports 'ata2.00: qc timeout (cmd 0xa0)' messages to system log (Doc ID 1587752.1)

Last updated on OCTOBER 30, 2013

Applies to:

Linux OS - Version Oracle Linux 5.8 with Unbreakable Enterprise Kernel [2.6.39] and later
Linux x86
Linux x86-64

Symptoms

An Oracle Linux system occassionally experiences periods of transient slowness.
The following (or similar) messages, the timings of which correspond to the periods of slowness, are reported to the system log:

 

Changes

The message may occur from initial system installation or may be triggered as a result of such things as:

Cause

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