Tuesday, April 1, 2014

After SAN upgrade, ASM gives an inconsistent sector size error

While this is an older Alert in My Oracle Support, the article "After SAN Firmware Upgrade, ASM Diskgroups ( Using ASMLIB) Cannot Be Mounted Due To ORA-15085: ASM disk "" has inconsistent sector size" under note ID 1500460.1 may have some relevance for you and I wonder if this may have something to do with an issue we had a while ago with ASM.  Apparently, the logical block sizes and physical block sizes can get out of sync after a SAN upgrade and more importantly the physical block size can be set to a size that ASM does not currently recognize as valid.  Yikes!

Luckily, this article does a VERY through job of explaining the problem, the cause, and the ways that it can be resolved.

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