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


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:



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


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