There are a lot of organisations out there that are still running AIX 5.3. As you must know, AIX 5.3 is out of support. That doesn't stop you updating to the latest Technology Level (TL 12). But you may not be entitled to the latest Service Pack (SP 6). If you're staying with AIX 5.3, then you have a choice of being supported; unsupported (but legal), or unsupported and illegal! Before looking at your Service Pack options for AIX 5.3, let's unravel what an AIX level really means. AIX Levels Terminology First, some bassic terminology: ...
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Tags: 
oslevel
aix_5.3
update_all
service_pack