topic Re: Mail box in ONTAP Discussions

Mail box

saranraj456 — Thu, 05 Jun 2025 06:32:59 GMT

Hi Frns,

Can anyone please explain me what are the contents /information available in mailbox ?

And while doing an head swap what is the need for deleting the Mailbox local ?

Regards,

Saran

Re: Mail box

aborzenkov — Sun, 11 Mar 2012 12:04:28 GMT

mailbox is used as secondary heartbit between controllers in HA pair as well as to keep track of which controller controls disks in case of takeover. For these purposes systemid is used. When doing head swap, systemid changes, so mailbox content becomes invalid and needs to be reinitialized.

Re: Mail box

saranraj456 — Tue, 03 Apr 2012 06:20:28 GMT

Hi,

How this can be used as a secondary heartbeat ?

Thanks .

Saran

Re: Mail box

radek_kubka — Tue, 03 Apr 2012 09:37:28 GMT

Both controllers can write to & read from mailbox - that allows for information exchange, as the cluster inter-connect wire for primary heartbeat.

Re: Mail box

saranraj456 — Fri, 31 Aug 2012 09:04:55 GMT

Hi, i posted a new thread instead of asking here.

do we need to destroy the mailbox while replacing the motherboard? bcoz the system id vary after replacement.

Saran