Planning Considerations for CMS DL/I IN THE CMS/DOS ENVIRONMENT Batch DL/I application programs can be written and tested in the CMS/DOS environment. This includes all batch application programs written in COBOL, PL/I, or Assembler language.
You can also execute any data base description generation and program
specification block generation. The data base recovery and
reorganization utilities must also be executed in aDOS/VS virtual
machine.
For more information, see theCMS and DL/I Infofmati2n, GH20-1246. eMS Disk and File Management CMS can manage up to ten virtual disks for each user. These disks may
be minidisks or full packs. Moreover, they may be in:• eMS format • as or DOS format • VSAM format When the VM/370 MSS support is installed, and the VM/370 processor is
attached to anMSS, any CMS virtual disk can be located on an MSS 3330V volume. eMS disks are formatted with the CMS FORMAT command; files contained
on these disks are in a format unique toCMS, and cannot be read or
wri tten using other operating systems.-
as andDOS disks or minidisks may be used in CMS. as or DOS programs
executing inCMS may read data sets or files on as or DOS disks, but may
notwrite or update them: as and DOS minidisks may be formatted with
the IBCDASDI service program, or with an appropriateOS/VS or DOS/VS disk initialization program, if the disk is a full pack. VSAM disks used in CMS are fully compatible with as and DOS VSAM disks. Minidisks for use with VSAK must be formatted with the IBCDASDI
program; full disks must be initialized using the appropriateas/iS or DOS/VS disk initialization program. DISK ACCESS Disks can be accessed in two ways: read-only, where files on that disk
canonly be read; and read/write, where files can be read and written.
Both CP andCMS can control read/write access. If a disk is
designated read/write by CP, then theCMS access determines its
read/write status. If a disk is desi9nated read-only by CP, then it can
only be accessed read-only inCMS. Part 1. Planning for System Generation 25
You can also execute any data base description generation and program
specification block generation. The data base recovery and
reorganization utilities must also be executed in a
machine.
For more information, see the
be minidisks or full packs. Moreover, they may be in:
attached to an
on these disks are in a format unique to
wri tten using other operating systems.-
as and
executing in
not
the IBCDASDI service program, or with an appropriate
program; full disks must be initialized using the appropriate
can
Both CP and
designated read/write by CP, then the
read/write status. If a disk is desi9nated read-only by CP, then it can
only be accessed read-only in