Re: ASM adding disk with different sector size

Sandra,
 To the best of my understanding - ASM does not permit mixed sector sizes in a single disk group - so I presume that rules out the use of the 'removing the old disks and rebalance as we go'

You didn't include the version of grid infrastructure/ASM that your environment is running ... but this was not allowed in 12c...

12c -->
https://docs.oracle.com/database/121/OSTMG/GUID-8B656725-D347-4166-8775-1070B6C4D580.htm#OSTMG10203

In 19c and higher - there's the concept of logical_sector_sizes and physical_sector_sizes but I am unsure of how that would fit into your migration scenario...

https://docs.oracle.com/en/database/oracle/oracle-database/21/ostmg/create-diskgroups.html#GUID-8B656725-D347-4166-8775-1070B6C4D580

Additions, comments, corrections welcome (and I will gladly defer to the wiser folks in this group)

Thanks,

--Rajesh

On Tue, Oct 12, 2021 at 2:16 PM Sandra Becker <sbecker6925_at_gmail.com> wrote:

> We need to move some databases off of their current storage, which is old
> and no longer supported. The new disk will have a different sector size.
> Can we create a new diskgroup for the new storage and use it along with the
> old storage? If possible, can we do the balancing and then start removing
> the old disks and rebalance as we go? I'm not very familiar with ASM, so
> would appreciate some guidance or pointing me to an appropriate document.
> I've been doing some google searches, but still not sure we can move the
> databases in this manner.
>
> Thank you,
>
> --
> Sandy B.
>
>

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