ORA-27061: waiting for async I/Os failed

Hi

One of our Physical Standby database aborted with "ORA-27061: waiting for async I/Os failed" error. The instance was killed by the DBWR process. Apparently, it was found to be an OS bug (IBM - AIX5L Based Systems) and an OS patch seems to resolve this issue.

Our current OS Patch level is AIX5.3 TL5-CSP and we need to upgrade it to either AIX5.3 TL6 SP4 or AIX5.3 TL7 to avoid this problem occurring in the future.

References:

Metalink Note Id: 467613.1 addresses this issue.

Happy reading :-)

A Nice and Handy UNIX Guide

Most of the times we struggle to find the equivalent commands on other Operating Systems, say from AIX to Linux. Normally, we google and after a hard work we ended up with one equivalent command.

I have found the following link to be of great help, it compares commands between AIX, HP-UX, Linux, Solaris, and Tru64.

http://unixguide.net/cgi-bin/unixguide.cgi

Now it’s easy to answer questions like “What is the equivalent command for on HP-UX for df -k on AIX??”

Thanks for reading :-))

How to find my Windows is 32-bit or 64-bit?

How to find my Windows is 32-bit or 64-bit? To find the answer to this question, follow this link http://support.f-secure.com/enu/home/supportissue/fsis2007/before_install_q07.shtml How to find the OS block size of my Windows OS? Microsoft defines Cluster as “In data storage, the smallest amount of disk space that can be allocated to hold a file. All file systems used by Windows organize hard disks based on clusters, which consist of one or more contiguous sectors.” To find the OS block size: Right Click on “My Computer” icon on the desktop Click on “Manage” Expand “Storage” and select “Disk Defragmenter” Press the “Analyze” button Once your windows completes the analysis, it presents you with a report. Press “View Report” button The block size is indicated by “Cluster Size”. In my case it’s 4K. How to set the OS block size on my Windows OS? Open the Windows Explorer. Right Click on your “C drive” and click on “Format”. A window is presented with couple of options. The OS block size is displayed by a drop-down list labeled “Allocation unit size”.