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CHECKD.DOC -- Changes from V5.1(82) to V6(53)
COPYRIGHT (C) 1976,1979,1982,1984 BY DIGITAL EQUIPMENT
CORPORATION, MAYNARD, MASS.
THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED
AND COPIED ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE
AND WITH THE INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS
SOFTWARE OR ANY OTHER COPIES THEREOF MAY NOT BE PROVIDED OR
OTHERWISE MADE AVAILABLE TO ANY OTHER PERSON. NO TITLE TO
AND OWNERSHIP OF THE SOFTWARE IS HEREBY TRANSFERRED.
THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE
WITHOUT NOTICE AND SHOULD NOT BE CONSTRUED AS A COMMITMENT
BY DIGITAL EQUIPMENT CORPORATION.
DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY
OF ITS SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY
CHECKD.DOC -- Changes from V5.1(82) to V6(53) Page 2
CHECKD checks TOPS-20 disk file structure and bittable for
consistency. In the process of checking the directory
structure, CHECKD finds all disk space which is in use;
this allows CHECKD to compute the disk pages lost. CHECKD
can optionally release this lost space. CHECKD can also be
used to completely rebuild the disk bittable or to scan the
directory structure for a specified disk address. CHECKD
may also be used to create new file structures.
CHECKD provides the ability for initializing labeled
magnetic tapes and for displaying label information on
CHECKD version 6(53) runs ONLY on TOPS-20 Release 6.
CHECKD is documented in the TOPS-20 Operator's Guide.
2.0 EXTERNAL CHANGES
2.1 USE OF DECIMAL NUMBERS
Questions and displays of the channel, controller, and unit
numbers are now displayed in decimal.
2.2 RP20 SUPPORT
There is a new command SET DRIVE-SERIAL-NUMBER (FOR RP20) to
allow system managers to set the serial number for an RP20
disk unit. This is necessary to allow CFS to share the disk
3.0 KNOWN BUGS AND DEFICIENCIES
4.0 INSTALLATION INSTRUCTIONS
CHECKD.DOC -- Changes from V5.1(82) to V6(53) Page 3
4.1 Files Needed To Run CHECKD
CHECKD consists of one file, CHECKD.EXE. CHECKD should be
installed on both SYS: and SYSTEM:
4.2 Instructions For Loading And Installing CHECKD
Mount the tape labeled Installation Tape on MTA0: and type
the following commands:
SKIP MTA0:5 FILES
RESTORE <*>CHECKD.EXE (TO) SYS:*.*.-1
COPY SYS:CHECKD.EXE SYSTEM:CHECKD.EXE
4.3 Files Needed To Build CHECKD
CHECKD is built from the following file:
In addition, the following files must be in SYS:
4.4 Instructions For Building CHECKD
Mount the tape labeled Distribution Tape on MTA0: and type
the following commands:
RESTORE <*>*.*.* (TO) <self>*.*.*
CHECKD.DOC -- Changes from V5.1(82) to V6(53) Page 4
4.5 Special Considerations
CHECKD must be run with WHEEL or OPERATOR enabled, since it
does physical disk accesses. As with most privileged
programs, CHECKD must be used with caution. Rebuilding the
bittable under any condition except stand alone will very
likely result in a mangled file structure.
Care shoud be taken when initializing labeled tapes, since
CHECKD will unconditionally destroy any existing data on a
tape when it initializes it.
5.0 INTERNAL CHANGES
CHECKD is now able to recognize any disk that the monitor
knows about. With this release that inlcudes the following
new disks: RA81, RA60.
The help text for CHECKD is now embedded in the code.
Use extreme caution.
[End of CHECKD.DOC]