When registering a node on the TSM server for the use of the Archive Node (or updating an existing node), you must specify the number of mount points that the node can use for write operations by specifying the MAXNUMMP parameter to the REGISTER NODE command. The number of mount points is typically equivalent to the number of tape drive heads allocated to the Archive Node. The number specified for MAXNUMMP on the TSM server must be at least as large as the value set for the ARC > Target > Configuration > Main > Maximum Store Sessions for the Archive Node, which is set to a value of 0 or 1, as concurrent store sessions aren't supported by the Archive Node.

The value of MAXSESSIONS set for the TSM server controls the maximum number of sessions that can be opened to the TSM server by all client applications. The value of MAXSESSIONS specified on the TSM must be at least as large as the value specified for ARC > Target > Configuration > Main > Number of Sessions in the Grid Manager for the Archive Node. The Archive Node concurrently creates at most one session per mount point plus a small number (< 5) of additional sessions.

The TSM node assigned to the Archive Node uses a custom domain policy tsm-domain. The tsm-domain domain policy is a modified version of the “standard” domain policy, configured to write to tape and with the archive destination set to be the StorageGRID system's storage pool (SGWSDiskPool).