ASM_DISKSTRING parameter MAXIMUM length

Hi.

It was quite interesting situation when one customer contacted me and asked for the maximum length of ASM_DISKGROUP parameter’s value.

I remembered that the maximum number of diskgroups is 63 but stuck with asked question…

So I think this information may be useful to others.

Conclusion:

  • if You have a lot of diskgroups and You’re at ASM version 10.2 then You have one more reason to upgrade your ASM instance to version 11.x

PS.

  • ASM_DISKGROUPS parameter only limits the set of diskgroups that will be automatically mounted on instance startup, so You may have diskgrpous not mentioned with this parameter, but You will need to mount them manually.
  • different instances of RAC may have different values for this parameter, so You may specify just a subset of diskgroups which are used on specific node
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s