Using SQL 2000
Backup
"C:\program Files\Microsoft Analysis Services\BIN\msmdarch.exe" /a ServerName "E:\program Files\Microsoft Analysis Services\Data" "DatabaseName" "E:\DBBACKUPS\olap\DatabaseName.CAB" "E:\DBBACKUPS\olap\DatabaseName.log"
Restore
"C:\program Files\Microsoft Analysis Services\BIN\msmdarch.exe" /r ServerName "E:\program Files\Microsoft Analysis Services\Data" "DatabaseName" "E:\DBBACKUPS\olap\DatabaseName.CAB" "E:\DBBACKUPS\olap\DatabaseName.log"