ethan@thinc.COM (Ethan.Lish@THINC.COM) (04/03/91)
Greetings -
I am interested in haveing a SCO Xenix 286 System be
self-rebootable, such that in the event of a system crash ;-(
or power outage (extended), the box would just restart itself without
human intervention.
I have looked at autoboot(ADM), boot(HW), default(F)
and filesys(F), but I am unable to get the right combination of
variables.
Could some one tell me if this is posible and how it is done?
Thanks,
\Ethan\
PS I would also like to know the options to mknod for createing /dev/scratch
--
"If everyone swept his own doorstep, the whole world would be clean"
A Chinese proverb
Ethan.Lish@THINC.COM _____ 1.301.652.0651 _____ {uunet,anagld}!thinc!ethan
Tomorrow's Horizons, Inc. 4807 Bethesda Ave, #330, Bethesda, MD 20814-5299 basien@pemcom.pem-stuttgart.de (Tillmann A. Basien) (04/04/91)
ethan@thinc.COM (Ethan.Lish@THINC.COM) writes: > I have looked at autoboot(ADM), boot(HW), default(F) > and filesys(F), but I am unable to get the right combination of > variables. Do you set the timeout in /etc/default/boot Here is my file: # @(#) boot.dfl 1.7 89/01/31 # # # UNIX is a registered trademark of AT&T # Portions Copyright 1976-1989 AT&T # Portions Copyright 1980-1989 Microsoft Corporation # Portions Copyright 1983-1989 The Santa Cruz Operation, Inc # All Rights Reserved # @(#)init:boot.dfl 1.2 # DEFBOOTSTR=hd(40)unix AUTOBOOT=YES FSCKFIX=YES MULTIUSER=YES PANICBOOT=NO MAPKEY=YES SERIAL8=YES TIMEOUT=10 My system is coming up in 10 secondes. >PS I would also like to know the options to mknod for createing /dev/scratch I think you need /dev/scratch because your root file system is very big. /dev/scratch is only some memory. It can be a floppy disk or a part of your harddisk. So, if you install a new system with a great harddisk, reserve about 1200 blocks in divvy and set the name of this part to scratch. Don't set the flag to creat a filesystem, this part of the harddisk is like the swap space. If you alread has the the part on your hard disk, but no /dev/scratch (because you deleted or so) the following command will set your entry mknod /dev/scratch b 1 40+offset offset it the slot in the divvy table Hope this helps Tillmann >-- > "If everyone swept his own doorstep, the whole world would be clean" > A Chinese proverb > Ethan.Lish@THINC.COM _____ 1.301.652.0651 _____ {uunet,anagld}!thinc!ethan > Tomorrow's Horizons, Inc. 4807 Bethesda Ave, #330, Bethesda, MD 20814-5299 -- basien@PEM-Stuttgart.de Dipl.-Ing. Tillmann A. Basien PEM Programmentwicklungsgesellschaft Vaihinger Str.49, PostBox 810165 fuer Microcomputer mbH FRG 7000 Stuttgart 80 voice: +49-711-713045 fax: +49-711-713047
macleod@cmllab.rgb.sub.org (Connor MacLeod) (04/09/91)
In article <19621128@thinc.COM> ethan@thinc.COM (Ethan.Lish@THINC.COM) wrote: | Greetings - Re... :) | I am interested in haveing a SCO Xenix 286 System be | self-rebootable, such that in the event of a system crash ;-( I think the only thing you have to do is adding the following entry to /etc/default/boot: TIMEOUT=120 ^^^ | +---- number of seconds to wait at each prompt This is enough for self-rebooting after a "sync; reboot" or a power fail. You may decide to change the PANICBOOT from NO to YES but I think you'll loose some interesting messages on the system console when the system comes up again. | PS I would also like to know the options to mknod for createing /dev/scratch Hm... I think that's not necessary to create /dev/scratch. As far as I remember the system uses /dev/swap (or something else :>) when auto-booting. (BTW I'm running SCO Unix and I think the major/minor device numbers are _not_ the same for SCO Xenix... sorry) Rgds -- Uwe Obst # {connor|macleod}@cmllab.rgb.sub.org (aka Connor MacLeod) # "Trust me, I know what I'm doing!" -- Sledge Hammer
curt@cynic.wimsey.bc.ca (Curt Sampson) (04/11/91)
In article <1991Apr09.005151.2635@cmllab.rgb.sub.org> macleod@cmllab.rgb.sub.org (Connor MacLeod) writes: > | PS I would also like to know the options to mknod for createing /dev/scratch > > Hm... I think that's not necessary to create /dev/scratch. As far as I > remember the system uses /dev/swap (or something else :>) when auto-booting. > (BTW I'm running SCO Unix and I think the major/minor device numbers are > _not_ the same for SCO Xenix... sorry) No, the system does need /dev/scratch if your root filesystem is larger than a certain size. (I don't know what the size is, but a 25 MB filesystem doesn't need it and a 40 MB filesystem does.) If you root system doesn't need it you can get by without one quite easily; any filesystems other than root can use a file on the root partition for scratch instead. Another option is to keep a floppy in your B drive and use /fd1 as your scratch device. cjs -- | "It is actually a feature of UUCP that the map of curt@cynic.uucp | all systems in the network is not known anywhere." curt@cynic.wimsey.bc.ca | --Berkeley Mail Reference Manual (Kurt Schoens)
macleod@cmllab.rgb.sub.org (Connor MacLeod) (04/13/91)
In article <1991Apr11.061740.409@cynic.wimsey.bc.ca> curt@cynic.wimsey.bc.ca (Curt Sampson) wrote: | In article <1991Apr09.005151.2635@cmllab.rgb.sub.org> | macleod@cmllab.rgb.sub.org (Connor MacLeod) writes: | | > | PS I would also like to know the options to mknod for createing /dev/scratch | > | > Hm... I think that's not necessary to create /dev/scratch. As far as I | > remember the system uses /dev/swap (or something else :>) when auto-booting. | > (BTW I'm running SCO Unix and I think the major/minor device numbers are | > _not_ the same for SCO Xenix... sorry) | | No, the system does need /dev/scratch if your root filesystem is | larger than a certain size. So... If this is right what about creating a link /dev/scratch -> /dev/swap? I don't think that /dev/swap is used during autoboot (am I wrong?). Rgds -- Uwe Obst # {connor|macleod}@cmllab.rgb.sub.org (aka Connor MacLeod) # "Trust me, I know what I'm doing!" -- Sledge Hammer
curt@cynic.wimsey.bc.ca (Curt Sampson) (04/16/91)
In article <1991Apr13.132140.1794@cmllab.rgb.sub.org> macleod@cmllab.rgb.sub.org (Connor MacLeod) writes: > So... If this is right what about creating a link /dev/scratch -> /dev/swap? > I don't think that /dev/swap is used during autoboot (am I wrong?). You may be right, but why risk it? /dev/swap is used by the OS whenever it needs it when the OS is running, whether during boot or not. Now, if you've got any reasonable amount of memory it is highly unlikely that you would swap anything during the boot. But you might. If it does swap, it's guarenteed to crash your system and it will quite possibly corrupt your root filesystem. I'd advise just keeping your root filesystem small. The only reason mine is 25 MB is because I don't keep a seperate partition for my /pub directory. (I've got complete control over what goes in there, so I don't need to worry about overflow.) Under Xenix, a 12 MB or so root should be plenty (assuming seperate /tmp, /usr, /u, etc.). cjs -- | "It is actually a feature of UUCP that the map of curt@cynic.uucp | all systems in the network is not known anywhere." curt@cynic.wimsey.bc.ca | --Berkeley Mail Reference Manual (Kurt Schoens)