IBM Professional Series User Manual page 238

not yet caused CMS to rewrite the file directory.)
Reissue the ACCESS command without the ERASE
option.
8.
If
two or more disks have been accessed in CMS, and
CP DEFINE commands are executed that swap virtual
addresses, then a subsequent RELEASE command may
write the file directory on the wrong disk; for example:
(CMS) ACCESS 193 C
(CMS) ACCESS 198 E
(CP) DEFINE 193 293
(CP) DEFINE 198 193
(CMS) RELEASE C
This sequence of commands will write the file directory
from 193 to 198 since the CP definitions are unknown
to CMS.
9. To free an accessed disk, refer to the CMS RELEASE
Command.
Responses:
DMSACC723I mode (cuu) read/only
This message is displayed if the disk is accessed
read-only.
DMSACC7241 cuu1 REPLACES mode(cuu2)
Before execution of the command, the disk
represented by cuu2 was the "mode" disk. The disk,
cuu 1, is now assigned that filemode letter. This
message is followed by message DMSACC726I.
DMSACC7251 cuu ALSO
=
Imode l DISK
The disk specified by cuu is the mode disk and an
ACCESS command was issued to assign it another
filemode letter.
DMSACC7261 ICUU model RELEASED
The disk being accessed at virtual address cuu as a
read/write disk is already accessed at a different
mode.
It
is released from that mode. Or, a disk
currently accessed at mode is being replaced.
Chapter 7. VM/PC Commands 7 -65