11-15-2018
SCO OpenServer 5 Will Not Boot
We have a legacy system that runs on SCO OpenServer 5.0.6, and I've rebuilt the server a couple of times so we can have access to old historical data. That system suddenly went offline for no known reason, and I know that the configuration has not been altered, there is nobody with access to the root login except for me, and there have been no changes. The current problem does not appear to be with the hard drive, as in past problems I have dealt with. When the system starts up I can see that it "finds" and lists the IDE drive, and it will come to the "Boot:" prompt. When I hit "Enter" at the boot prompt, like normal, it goes through about one screen of the loading process, and then it just goes blank, and I get a "no signal" notification on the monitor, and the machine restarts. I have tried entering "unix.old" at the boot prompt, but is still does the same thing. Then I read somewhere online to try "unix.safe" at the boot prompt, and this got me further. It looked like it was going to take me all the way to a login prompt, but then it stopped and this error showed up on the screen:
Open event driver failed.... Fatal server error.... Check mouse configuration
So I thought maybe something happened to the mouse, and I plugged a different one in but it still does the same thing. Like I said I know that there was no change made to any mouse configuration in the O/S, so what can I try now? I would appreciate any and all suggestions about how I can get this system back up and running. Thanks.
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BOOT(8) System Manager's Manual BOOT(8)
NAME
boot - startup procedures
DESCRIPTION
A PDP11/45 and PDP11/70 UNIX system is started by a two-stage process. The first is a primary bootstrap which is able to read in rela-
tively small stand-alone programs; the second (called boot) is used to read in the system itself.
The primary bootstrap must reside in the otherwise unused block zero of the boot device. It can be read in and started by the standard ROM
programs, or if necessary by keying in a small startup routine. This program is capable of loading type 407 executable files (not shared,
not separate I&D). The user types on the system console the name of the program wished, in this case boot, followed by a carriage return;
the named program is retrieved from the file system that starts at block 0 of drive 0 of the boot device. No prompt is given, no diagnos-
tic results if the file cannot be found, and no provision is made for correcting typographical errors.
The second step, called boot, actually brings in the system. When read into location 0 and executed, boot sets up memory management, relo-
cates itself into high memory, and types a `:' on the console. Then it reads from the console a device specification (see below) followed
immediately by a pathname. Boot finds the corresponding file on the given device, loads that file into memory location zero, sets up mem-
ory management as required, and calls the program by executing a `trap' instruction. Normal line editing characters can be used.
Conventionally, the name of the secondary boot program is `/boot' and the name of the current version of the system is `/unix'. Then, the
recipe is:
1) Load block 0 of the boot device by fiddling with the console keys as appropriate for your hardware. If you have no appropriate ROM,
some programs suitable for manual use are given below.
2) Type boot.
3) When the prompt is given, type
hp(0,0)unix
or
rp(0,0)unix
depending on whether you are loading from an RP04/5/6 or an RP03 respectively. The first 0 indicates the physical unit number; the
second indicates the block number of the beginning of the logical file system to be searched. (See below).
When the system is running, it types a `#' prompt. After doing any file system checks and setting the date (date(8)) a multi-user system
is brought up by typing an EOT (control-d) in response to the `#' prompt.
Device specifications. A device specification has the following form:
device(unit,offset)
where device is the type of the device to be searched, unit is the unit number of the device, and offset is the block offset of the file
system on the device. Device is one of the following
rp RP03
hp RP04/5/6
rk RK05
For example, the specification
hp(1,7000)
indicates an RP03 disk, unit 1, and the file system found starting at block 7000 (cylinder 35).
ROM programs. The following programs to call the primary bootstrap may be installed in read-only memories or manually keyed into main mem-
ory. Each program is position-independent but should be placed well above location 0 so it will not be overwritten. Each reads a block
from the beginning of a device into core location zero. The octal words constituting the program are listed on the left.
RK (drive 0):
012700 mov $rkda,r0
177412
005040 clr -(r0) / rkda cleared by start
010040 mov r0,-(r0)
012740 mov $5,-(r0)
000005
105710 1: tstb (r0)
002376 bge 1b
005007 clr pc
RP (drive 0)
012700 mov $rpmr,r0
176726
005040 clr -(r0)
005040 clr -(r0)
005040 clr -(r0)
010040 mov r0,-(r0)
012740 mov $5,-(r0)
000005
105710 1: tstb (r0)
002376 bge 1b
005007 clr pc
FILES
/unix - system code
/usr/mdec/rpuboot, /usr/mdec/hpuboot - copies of primary bootstrap
/boot - second stage bootstrap
SEE ALSO
init(8)
BOOT(8)