Here are my error messages interspersed with the SQL that caused them.

-- try just to use the database

use cfs_vehicle_backups

Msg 945, Level 14, State 2, Server CFSDB02, Line 3

Database 'CFS_Vehicle_Backups' cannot be opened due to inaccessible files or insufficient memory or disk space. See the SQL Server errorlog for details.

use master

Changed database context to 'master'.

-- try to add space to the tran log

alter database cfs_vehicle_backups add log file (name=TranLog2, filename='E:\SqlData\Cfs_Vehicle_Backups.log2', size=20MB)

Msg 945, Level 14, State 2, Server CFSDB02, Line 3

Database 'CFS_Vehicle_Backups' cannot be opened due to inaccessible files or insufficient memory or disk space. See the SQL Server errorlog for details.

-- try to set the database offline

alter database cfs_vehicle_backups set offline with rollback immediate

Msg 5069, Level 16, State 1, Server CFSDB02, Line 3

ALTER DATABASE statement failed.