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- Path: sparky!uunet!haven.umd.edu!umd5!oberon.umd.edu!matthews
- From: matthews@oberon.umd.edu (Mike Matthews)
- Newsgroups: comp.sys.next.sysadmin
- Subject: Re: Help! Installing 3.0 on external HD
- Message-ID: <17898@umd5.umd.edu>
- Date: 11 Jan 93 01:30:16 GMT
- References: <ntomczak.726619722@vega> <1993Jan10.170814.9221@znext.cts.com>
- Sender: news@umd5.umd.edu
- Organization: Los Alamos National Laboratory, NM
- Lines: 40
-
- In article <1993Jan10.170814.9221@znext.cts.com> zeke@znext.cts.com writes:
- > so the syntax should be
- > 'b sd(0,2,0)' to boot off of sd2 partition a. The NeXT only has one
- >controller ( unless you have an extra cpu card a la Spherical ) an that one
- >defaults to 0. The syntax provided would probably confuse the system, and the
-
- Um, no. The first number is the SCSI ID, the second is the LUN (which lots
- of people theorize will always be 0 on the NeXTs because they only have one
- SCSI channel; makes sense to me but I can't confirm or deny it personally),
- and the last is the partition number.
-
- It loads the boot block off the device you ask for (it *may* check all
- devices if the first one fails, but my experience with that suggests it
- doesn't), and then it boots the kernel off of whatever device has it,
- starting with the one you specify (e.g. a bsd(2,0,0) will check SCSI ID 2 for
- a kernel, and if it can't find that, it'll check the rest of your devices).
- -a will indeed ask you for the rootdevice, but you can always
-
- bsd(2,0,0)- rootdev=sd1
-
- Note the dash and the space. You can replace the dash with 'sdmach' as well,
- which is what the ROM monitor does for you, assuming a SCSI disk.
-
- Be forewarned that if your root device is NOT /dev/sd0a, /etc/fstab is
- incorrect and when you try to do a mount -o remount,rw / in /etc/rc.boot, it
- ain't gonna work very well.
-
- > Zeke
-
- I've booted off of non-sd0 devices before, and I know the syntax is
- bsd(x,0,0) where x is the SCSI ID. The other stuff I'm extrapolating from
- the "nbuf" hack as I always used -a when I had to specify an alternate root
- partition.
- ------
- Mike Matthews, matthews@oberon.umd.edu (NeXTmail accepted)
- ------
- Nothing recedes like success.
- -- Walter Winchell
-
-
-