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.;1-APR-77-GR
\\
.LM0;.RM70;.F;.J;.FLAG CAP;.SP1;.TS5
^^REDALL.DOC\\ -- ^CHANGES FROM ^V5 TO ^V6(1)
.BR
^APRIL 1971
.FG30
^COPYRIGHT (^C) 1971,1973,1975,1977
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^DIGITAL ^EQUIPMENT ^CORPORATION, ^MAYNARD, ^MASS.
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^THIS SOFTWARE IS FURNISHED UNDER A LICENSE FOR USE ONLY ON A
SINGLE COMPUTER SYSTEM AND MAY BE COPIED ONLY 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 EXCEPT FOR USE ON SUCH SYSTEM AND TO ONE WHO
AGREES TO THESE LICENSE TERMS. ^TITLE TO AND OWNERSHIP OF THE
SOFTWARE SHALL AT ALL TIMES REMAIN IN ^^DEC\\.
.B 1
^THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT
NOTICE AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ^DIGITAL
^EQUIPMENT ^CORPORATION.
.B 1
^^DEC\\ ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS
SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY ^^DEC\\.
.T <RDL6.DOC
.PG
^^REDALL.DOC\\ -- ^CHANGES FROM ^V5 TO ^V6(1)
.BR
^APRIL 1971
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.B3
1.0##<SUMMARY
.B1
<REDALL IS A PROGRAM TO GIVE A CURSORY TEST OF THE STATE OF
THE DISKS ON A SYSTEM. ^IT IS NOT INTENDED TO BE A DIAGNOSTIC,
ALTHOUGH IT DOES PRINT OUT ERROR INFORMATION WHICH WILL BE OF
HELP TO FIELD SERVICE. ^ITS MAIN VIRTUE IS THAT IT RUNS QUICKLY
AND ACCESSES ALL OF THE BLOCKS ON ALL DISKS. ^FURTHERMORE IT RUNS
UNDER THE MONITOR, SO THAT ERROR REPORTING AND RECOVERY ARE THE
SAME AS FOR REGULAR USERS. ^IT IS RECOMMEND THAT <REDALL BE RUN
DAILY AND WHENEVER FIELD SERVICE HAS FINISHED MAINTENANCE.
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2.0##<EXTERNAL <CHANGES
.B1
^NONE.
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3.0##^^KNOWN BUGS AND DEFICIENCIES\\
.B1
^THE CYLINDER, SURFACE, AND SECTOR ARE ONLY CORRECT FOR <DPA UNITS.
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4.0##<INSTALLATION <INSTRUCTIONS
.B1.I5
_.<LOAD <REDALL
.I5
_.<SAVE <REDALL
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5.0##<INTERNAL <CHANGES
.B1
^NONE.
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6.0##<OPERATING <INSTRUCTIONS
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^LOGIN UNDER 1,2 SO THAT SUPER <USETI<S ARE LEGAL. ^THEN TYPE:
.B1.I5
_.<R <REDALL
.B1
<REDALL WILL READ ALL BLOCKS OF ALL UNITS (<FHA, <DPA, <DPB, ETC.)
WHETHER THEY ARE IN A FILE STRUCTURE OR NOT USING SUPER <USETI.
^IT WILL NOT READ UNITS WHICH ARE DOWN OR OFF-LINE.
^ERRORS WILL BE ENTERED INTO THE <BAT BLOCK BY THE MONITOR
JUST LIKE NORMAL FILE ERRORS.
^IF <REDALL FINDS NO ERRORS, IT WILL TYPE "^^ALL DISK UNIT READ\\" AND
RETURN TO THE MONITOR. ^IF IT FINDS AN ERROR, IT WILL PRINT
A HEADING, FOLLOWED BY CYLINDER, SURFACE, AND SECTOR
IN DECIMAL FOLLOWED BY <CONI BITS 12 THRU 29, THEN THE UNIT NAME.
^IF <REDALL GETS AN UNEXPECTED ERROR FROM A <UUO, IT PRINTS
"^^ABNORMAL ERROR RETURN\\" AND EXITS TO THE MONITOR.
<REDALL TAKES ABOUT 2 MINUTES FOR EACH <RP02 UNIT AND CAN BE
RUN DURING TIMESHARING WITHOUT AFFECTING OTHER USERS NOTICEABLY.
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^THE READ ALGORITHM IS IMPORTANT TO UNDERSTAND.
<REDALL READS 40 DECIMAL BLOCKS IN ONE GULP IN <DUMP MODE.
^IF ANY ERRORS OCCUR, <REDALL READS THE GULP 1 BLOCK
AT A TIME UNTIL IT FINDS
THE ERROR OR EXHAUSTS THE GULP. ^IT PRINTS EACH BLOCK IT FINDS BAD
ON RE-READ. ^IF IT DOES NOT FIND ANY BLOCKS BAD IN THE GULP
ON RE-READ, IT PRINTS THE FIRST BLOCK OF THE GULP AND FLAGS IT WITH
AN *. ^UPON FINDING THE FIRST GOOD BLOCK AFTER ONE OR MORE BAD BLOCKS
IT RETURNS TO THE MAIN LOOP AND READS A 40 BLOCK GULP STARTING WITH
THE BLOCK FOLLOWING THE FIRST GOOD BLOCK.

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[^END OF <RDL6.DOC]