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> init/rep/seg:1 dl0:
> copy du0: dl0:
init = initialize
initializes a new RT-11 directory structure on a volume
/rep = /replace
does a bad block scan and builds a replacement table which
goes into the home block, block 1
/seg:1 = /segments:1
An RT-11 directory consists of one or more segments (each
segment is two blocks) up to a max of 31 segments. Each
segment has enough room for up to about 72 standard-sized
directory entries (each entry defines a file). In each
segment, two directory entries are used for overhead (end
of segment and free space).
> This copy only copies the "*.DAT" files , no system files .
If you have more than 70 or so .DAT files, it won't
copy them all. The default number of segments for an
RD and RL volume is 31 segments. Personally, I would
get rid of the /SEG:1 option on those command lines... A
full-sized directory (31 segments) only costs 62 blocks.
> The restore procedure is
>
> INIT/SEG:1 du0:
> copy dl0: du0:
> DUP3B du0:A=du0:IPLPGM.SAV/U <---- THIS file does not allow boot
DUP3B? There is no standard RT-11 utility called DUP3B. The
standard RT-11 utility is DUP. I would suspect that they have
somehow altered it and use the altered utility.
Also, .SAV files are normally not used as the system image
(although there is no reason why not, so long as it truly
is an RT-11 system image)
> I can copy/boot du0:thorn.sys du0: then system
> boots but not the way the customer had it before this .
They may have had a STARTx.COM file which started up the
application program which they expect.
> And of course , the INit in this procedure wipes out all data in
> DU0: , and when you restore from DL0 to DU0 you only put the
> .dat files no boot block .
I would find out if they have the original installation disks
or if they have ever done a *system* backup.
> Anyways that is where I am at any IDeas or Hints ,
Feel free to contact me off-line about this, I was a former
developer of RT-11 for 15 years...
+--------------------------------+-----------------------------------------+
| Megan Gentry | tcp/ip (work): gentry@zk3.dec.com |
| Unix Support Engineering Group | this line intentionally left blank |
| Digital Equipment Corporation | (non-work): mbg@world.std.com |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "RT-11 Developer ... some *assembler* |
| (603) 881 1055 | required." - mbg |
+--------------------------------+-----------------------------------------+
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