On Monday evening I have the first occasion to perform some maintenance on one of our DataDomain systems. Our DD's are all setup for NFS access, so they are using FILE device type pools.
The plan is to: - stop all processes/sessions writing to the DD based FILE stgpools - mark the stgpool access=unavailable - umount the NFS filesystem - perform the DD work - mount the NFS filesystem - mark stgpool access=readwrite Question: What happens when a pool is changed to "access=unavailable"? With tape, I can mark drive offline and the current process will keep writing to it until it finishes. Is the same true with access=unavailable for a FILE dev pool? In other words, can I mark it unavailable FIRST, and then cancel any processes/sessions using it. This would prevent the wack-a-mole of sessions/processes starting as I cancel others. (note: disk pool will still be available during this work. The disk pool has a max size threshold set to force big files directly onto the DD. ) Rick ----------------------------------------- The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message.
