2. Take a storage dump if the automatic dump routine failed.
3. Try to preserve spooling and accounting data by issuing the SHUTDOWN command if it has not been done automatically.
4. Try to force error recording if it did not occur.
5. Attempt to analyze the problem by whatever means at his disposal
and if necessary, reallocate resources and priorities.
6. Call for technical assistance if necessary. Whenever there are indications that I/O errors require further
analysis or that basic integrity of a device needs to be determined,
other service programs may be invoked to help make such an assessment.
For example, to test the operational 3344 or 3350 DASD devices, the
operator may invoke the OS/VS and DOS/VS Analysis Prograa-1 (AP-1).
This utility program, if resident in the OS/VS or DOS/VS library of a
virtual machine, can be used to check the Froper operation of the
device. The use of this program along with error messages and user
action is detailed in the gnd (AP-l) In the event that technical assistance is required, it can be
obtained from the following sources: • The customer's own system programmer(s). • The service representative, who has special test equipment for
hardware problem isolation. e The IBM Program Support Bepresentative
6 who can also assist with VK/370 system problem diagnosis. You can assist with problem diagnosis by being alert for the
following error recording messages: DKKIOG550E I/O ERROR RECORDING AREA 90 PERCENT FULL; RUN CPEREP DKKIOG551E I/O ERROR RECORDING AREI FULL; RUN CPEREP You should then duap the error recording data to some other device
(usually a tape drive) and clear the error recording area to insure
enough space to reco=d additional error records. Information on how to
run CPEREP is contained in the gDg RecQrdiBg Additional information on OS/VS EREP, the program to which CPEREP passes
control is detailed in the Re£Q£ginq !ng E£in!ing publication. Other errors may not be severe enough to cause V8/370 system failure,
but might cause a specific virtual machine to abnormally terminate. In most cases, the user can IPt the virtual machine again. Should the V8/370 aachine enter an unexpected WAIT state or loop, see
the §y!de referring to the section entitled
"How To Use the VK/370 Facilities To Debug." Section 2. Initiating V8/370 Operation 25

3800 Printing Subsystem Support The 3800 printer is supported with all its functions as a dedicated
device. It has limited functional support when it is used as a spooling devicee Following is a list of features of the 3800 printer: I. PORMS CONTROL peraits the user to select the amount of vertical space I between printed lines. Lines can be vertically spaced at 6, 8, or 12 I lines per inch. Different spacings can also be mixed on the same I page. I • PORMS OVERLAY permits photographing of predefined data (forms) on one I or aore pages. The 3800 printer supports the creation of a form on a I page and the i.aediate printing of data on that form. I • PREDEFINED CHARACTER SETS permit the user to select previously I designated character sets that contain up to 64 characters each. I Different character sets provide varied character types, sizes, and I horizontal spacings between the characters. The 3800 supports the I simultaneous use of two character sets and optionally supports the I use of two additional character sets. The user can mix characters I froa the different character sets on a single page. Characters are I referenced within the 3800 through the use of translate tables. Up I to four translate tables may be loaded at anyone time. t • CHARACTER SET MODIPICATION permits user modification and extension of I character sets. I • COpy MODIFICATION per.its printing of predefined data (for example, t the same header on each page) or the suppression of printing I for selected data. I • MULTIPLE COPIES permits numerous copies of files and data sets to be I printed without the use of multiple-ply paper. Numerous copies of a I single 3800 buffer can also be printed.
The values that control feature selection and printing on the 3800 are stored in tables and aodules. Through use of the CP co.mands VM/310 can display the syabolic names of the translate tables and modules in
addition to the syabolic naae of the library where they are stored. Before printing a spool file, VM/310 initializes the 3800 by loading
it with the translate tables that control feature selection and
printing. VM/310 provides a capability to purge spool files that cause
load errors, which occur when a name is specified that does not match the specified image library. If PURGE is specified, all spool files
causing 3800 load errors will be purged. Otherwise, the spool file will
be held.
DEDICATED 3800 PRINTER SUPPORT YM/310 allows virtual aachines, including virtual V8/370, to attach the 3800 printer as a dedicated I/O device. When attached, the full
capability of the 3800 is available to the virtual machine. All of the
functions previously described are available when the 3800 is used as a
dedicated device, provided the device is specified in the RDEVICE macro
instruction at system generation. See the 26 VM/370 Operator's Guide