Recording through MkIV rack and DBBC simultaneously.
For MkIV rack, pcfs running on VNC session newsmerd:1 as usual. DBBC running through field system on pcfsho:1.
eRemoteCtrl and log monitor for MarkIV only
Disk VSN: MarkIV recording to HOB+0074 (Mark5A), DBBC recording to HOB+0072 (Mark5B+)
Data volume at beginning: 0