Oracle internals, debugging and undocumented features

MOS notes – Troubleshooting ASM

I just summarized few notes that I have used  for troubleshooting ASM.

Placeholder for AMDU binaries and using with ASM 10g [ID 553639.1]

ASMIOSTAT Script to collect iostats for ASM disks [ID 437996.1]

Information to gather when diagnosing ASM space issues [ID 351117.1]

and of course you can always dump ASM block  using

SQL> alter system dump datafile ‘<+DiskGroupName>/<Filename>’ block X; command to see it inside.

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