Before using the T-disk space, the user must first initialize it.
For storing DOS, OS, or VSAM files, use the IBCDASDI program to
initialize the minidisk and set up the VTOC. For CMS files, issue the CMS FORMAT command. Temporary minidisks are available to the virtual
.achine for the duration of the current terminal session. The area is
returned to VM/310 when one of the following actions occur: • The system forces the virtual machine off. • The virtual machine logs off. • The user issues a CP DETACH command to release the temporary
minidisk.
For details about defining, formatting, using, and sharing minidisks, refer to 18 Systems in a Virtual Machine

ALTERNATE PATH SUPPORT VM/370 alternate path supports the two-channel and two-channel switch
additional features. In the real hardware configuration, the
installation of the two-channel switch permits a real connection from
two real channels to a single control unit. Installation of the
two-channel switch additional feature allows a connection from four
different real channels to a single real control unit. The two-channel
switch plus the two-channel switch additional features are often
referred to as the "four-channel switch." Vo/370 alsc supports the string switch hardware feature that permits
a string of real devices to be physically connected to two real control
units. with this facility and the four-channel switches installed, VM/370 allows one to eight paths to a given device, as shown in Figure
1.
Section 1. General Considerations 19