April 1, 1981 Updating If you enter an invalid device address, the message DMSINI079E INVALID DEVICE ADDRESS - REENTER
is issued. Message DMSINI606R is reissued so that you can enter a
valid device address.
If you press the carrier return without entering a device address, X'190' is assumed to be system disk address. DMSINI615R Y-DISK ADDRESS = cuu
Enter the device address (cuu) of the system disk extension (Y-disk). On this disk CMS expects to find all system
information and programs not contained within the CMS nucleus and
not on the If the CMS nucleus is written on the Y-disk, then cuu is also the IPL device address.
If you enter an invalid device address, the message: DMSINI079E INVALID DEVICE ADDRESS - REENTER
is issued: Message DMSINI615R is reissued so that you can enter a
valid device address.
If you press the carrier return without entering a device address, X'19E' is assumed to be the address of the system disk extension. Notgl If you do not want to have a Y-disk, do not attach the device
that was specified (or defaulted to) as the Y-disk address. DMSINI607R REWRITE THE NUCLEUS? If you enter "yes", a copy of the CMS nucleus is written onto the
disk indicated in the response to messageDMSINI608R. If you enter
"no", the eMS nucleus is not written to disk.
If you enter neither "yes" nor "no," the message DHSINI081E INVALID REPLY - ANSWER "YES" OR "NO" is issued. Message DMSINI607R is reissued so that you can enter a
valid response.
If you enter "no", the remalnlng messages in generating a new CMS nucleus are skipped and control is passed to the CMS initialization
routine. DMSINI608F IPL DEVICE ADDRESS = cuu
Enter the address of the device (cuu) on which the CMS nucleus is
to be written. If you are using 390 to test the CMS nucleus, you
enter: 390. If the system disk and the IPL device are to be the
same, you need only press the carrier return.
If you enter an invalid device address, the message INVALID DEVICE ADDRESS - REENTER
is issued. Message DMSINI608R is reissued so that you can enter a
valid device address.
Part 5. Updating VM/310 353

Updating CMS If the IPL device you designated is not currently defined, is not
in read/write status, or is an unsupported device type, the message DMSIN1082E IPL DEVICE ERROR - REENTER
is issued. Message DMSINI608R is then reissued. At this time, you
may enter CP mode by pressing the Attention key (or equivalent) ,
then determine the status of the device you designated by entering
the CP command QUERY VIRTUAL cuu
and take the corrective action necessary to define the device for
your virtual machine or to access it in read/write status. You may
reenter CMS by issuing the CP command
BEGIN
Then you must reenter the device address. Once the device address
is accepted, message DMSINI609R is issued. DMS1NI609R NUCLEUS CYL ADDRESS = nnn
Enter the 1-to 3-digit cylinder number (nnn), for the device
entered in response to message DMSINI608R, where the CMS nucleus is
to be written. The number (nnn) must be between 1 and m-1 (where m
equals the number of cylinders on the disk). The number nnn must be entered in decimal. This is the cylinder you reserved when you
formatted the disk with the RECOMP option. In our example, since
the nucleus is written on the last cylinder of MIINT's 390, you
enter: 2
If you do not enter a valid decimal cylinder number, the message INVALID CYLINDER NUMBER - REENTER
is issued. Message DMSIN1609R is reissued and you may enter a
valid cylinder number.
If the cylinder specified is
cylinders already in use on the
file directory, then the message
not greater than the number of
device (as indicated in the master DMSINI083E NUCLEUS WILL OVERLAY FILES - RECOMPUTE is issued. You may respond with a larger cylinder number, or IPL CMS and format the specified IPL device with the RECOMP option. DMS1N1610R ALSO 1PL CYLINDER 01 (YESfNO) The initial IPL text is always written on the same cylinder as the CMS nucleus (the cylinder designated in response to message DMS1NI609F). The initial IPL text is a bootstrap program which
reads the nucleus from the designated cylinder. If it is not also
written on cylinder 0, then you must enter the cylinder number when
subsequent IPL commands are issued for the system being generated. See the IPL command description in the CP iQt Qgneral Your response has the following meaning:
yes Initial 1PL text is written on cylinder 0 as well as on the
cylinder designated in response to message DMSINI609R. no Initial 1PL text is written only on the cylinder designated in
response to message DMSINI609R. 354 IBM VM/370 Planning and System Generation Guide