Getting aux to use all of a quantum 105

[Don Gilbert]

I recently went through this hassle also, trying to find and mount
the extra 240 MB partition on a wrenrunner disk.  I'd used 
SilverLining to partition it with the default A/UX configuration,
which made a large extra partition called "Unreserved 1".  After
two failed attempts in which I installed A/UX from CD then wiped 
it out the entirely, I found a way.  Here is a commented log file
of the 3rd, successful try.  '***' are comments.

After installing A/UX, I used it's disk partition (dp) and new file
system (newfs) commands.  You should refer especially to CHapter 5 of
the A/UX Local System Administration manual (Preparing and Apple HD SC
for A/UX).  The first part of this manual refers only to Apple's HD SC
Setup program, but the remainder (Using dp, Making and Mounting an A/UX
File System) applies to any disk partitioned for A/UX.
 
If you don't have this manual, see man pages for dp, disktab, newfs, mount 
and fsentry.

*******************************************************************************
*                                                                             *
*                       W E L C O M E   T O   A / U X                         *
*                                                                             *
*******************************************************************************

Fri Dec 21 10:15:53 PST 1990
/
FILES             lib/              nextunix          users/
Useful Commands/  lost+found/       root/             usr/
bin/              mac/              shlib/
dev/              mnt/              tmp/
etc/              newunix           unix*

   	*** list all partitions on entire disk on SCSI 2
# dp /dev/rdsk/c2d0s31
"/dev/rdsk/c2d0s31" 9 partitions, 9 allocated 640299 blocks

	*** list partition 8 (last)
Command? p 8
DPM Index: 8
Name: "Extra", Type: "Apple_Free"
Physical: 13 @ 640270, Logical: 13 @ 0
Status:
        valid   alloc   in_use  not boot
        read    write
No Block Zero Block

	**** list partition 7.  This is the one I want to mount
Command? p 7    
DPM Index: 7
Name: "Unreserved 1", Type: "Apple_UNIX_SVR2"
Physical: 480000 @ 160270, Logical: 480000 @ 0
Status:
        valid   alloc   in_use  not boot
        read    write
Slice 3
Regular UNIX File System (1)
Cluster:   0    Type: FS        Inode: 1
Made: [0] Wed Dec 31 16:00:00 1969
Mount: [0] Wed Dec 31 16:00:00 1969
Umount: [0] Wed Dec 31 16:00:00 1969
No AltBlk map

Command? q

	*** I need a disktab entry for the wrenrunner 
	*** this was not supplied, so I added one to /etc/disktab.
	*** Save original disktab in case I mess up
# cp /etc/disktab /etc/disktab.0

	*** using TextEditor.  You will need to look thru the docs on
	*** your brand of disk, and find statistics for number of 
	*** sectors/track (ns), no. tracks/cylinder (nt) and no. cylinders
	*** on the disk (nc).
	*** The wrenrunner disktab looks like this
	# Wren Runner (CDC Wren 4 FH)
	#
	WrenRunner|WRENRUNNER|wrenrunner:\
			:ty=winchester:ns#46:nt#9:nc#1555:

	*** use new file system (newfs) to mount the "Unreserved 1" 
	*** partition, slice 3, on the wrenrunner.
	*** Look for a 'c2d0s3' slice to mount in /dev/rdsk
	
# newfs -v /dev/rdsk/c2d0s3 wrenrunner
newfs: /dev/rdsk/c2d0s3: No such file or directory

	*** Can't find one!
	*** I failed here twice before when I used c2d0s31, until
	*** I waded thru enough of the manuals to see that this refered
	*** to the entire disk, NOT the unmounted slice 3 on that disk
# ls /dev/rdsk/c2*
/dev/rdsk/c2d0s0
/dev/rdsk/c2d0s1
/dev/rdsk/c2d0s2
/dev/rdsk/c2d0s30
/dev/rdsk/c2d0s31
/dev/rdsk/c2d0s4
/dev/rdsk/c2d0s5
/dev/rdsk/c2d0s6

	*** at this point, I waded thru the manuals again and found
	*** that I could use dp to assign a slice number, 4, that IS found
	*** in /dev/rdsk.

# dp /dev/rdsk/c2d0s31
"/dev/rdsk/c2d0s31" 9 partitions, 9 allocated 640299 blocks

Command? p 7
DPM Index: 7
Name: "Unreserved 1", Type: "Apple_UNIX_SVR2"
Physical: 480000 @ 160270, Logical: 480000 @ 0
Status:
        valid   alloc   in_use  not boot
        read    write
Slice 3
Regular UNIX File System (1)
Cluster:   0    Type: FS        Inode: 1
Made: [0] Wed Dec 31 16:00:00 1969
Mount: [0] Wed Dec 31 16:00:00 1969
Umount: [0] Wed Dec 31 16:00:00 1969
No AltBlk map

Command? c 7
DPME Field? b
BZB Field? s

	*** change slice number from 3 to 4
Slice number + 1 [4]: 5
BZB Field? p
Slice 4
Regular UNIX File System (1)
Cluster:   0    Type: FS        Inode: 1
Made: [0] Wed Dec 31 16:00:00 1969
Mount: [0] Wed Dec 31 16:00:00 1969
Umount: [0] Wed Dec 31 16:00:00 1969
No AltBlk map

BZB Field? q
DPME Field? q

	*** write out changes
Command? w
Command? q


	*** now make a new file system of the partition
	
# newfs -v /dev/rdsk/c2d0s4 wrenrunner
/etc/fs/ufs/mkfs /dev/rdsk/c2d0s4 480000 46 9 4096 1024 16 10 60 2048 t
Warning: 240 sector(s) in last cylinder unallocated
/dev/rdsk/c2d0s4:       480000 sectors in 1160 cylinders of 9 tracks, 46 sectors
        245.8Mb in 73 cyl groups (16 c/g, 3.39Mb/g, 1536 i/g)
super-block backups (for fsck -b#) at:
 16, 6688, 13360, 20032, 26704, 33376, 40048, 46720, 53392, 60064,
 66736, 73408, 80080, 86752, 93424, 100096, 106000, 112672, 119344, 126016,
 132688, 139360, 146032, 152704, 159376, 166048, 172720, 179392, 186064, 192736,
 199408, 206080, 211984, 218656, 225328, 232000, 238672, 245344, 252016, 258688,
 265360, 272032, 278704, 285376, 292048, 298720, 305392, 312064, 317968, 324640,
 331312, 337984, 344656, 351328, 358000, 364672, 371344, 378016, 384688, 391360,
 398032, 404704, 411376, 418048, 423952, 430624, 437296, 443968, 450640, 457312,
 463984, 470656, 477328,

	*** lets see if this worked, check new file system
# fsck -y /dev/rdsk/c2d0s4
** /dev/rdsk/c2d0s4
** Last Mounted on
** Phase 1 - Check Blocks and Sizes
** Phase 2 - Check Pathnames
** Phase 3 - Check Connectivity
** Phase 4 - Check Reference Counts
** Phase 5 - Check Cyl groups
2 files, 5 used, 225385 free (5 frags, 56345 blocks, 0.0% fragmentation)


	*** now find a good subdirectory to mount it on / 
# ls -C
%TextEditor.Scratch  lib                  shlib
FILES                lost+found           tmp
TextEditor.Scratch   mac                  unix
Useful Commands      mnt                  users
bin                  newunix              usr
dev                  nextunix
etc                  root

	*** the A/UX manual recommends 'users'.  That's fine with me,
	*** but it already exists and has some files.  
# ls -F users
Guest/
start/
start.bak/

	*** so rename users and make a new, empty 'users' directory
	*** for the new file system
# mv users user0
# mkdir /users

	*** now mount it
# mount -v /dev/rdsk/c2d0s4 /users
mount: /dev/rdsk/c2d0s4 on /users: Block device required [errno: 15]
mount: giving up on /users
	
	*** Oops, try /dev/dsk instead, as the manual suggests.
# mount -v /dev/dsk/c2d0s4 /users
/dev/dsk/c2d0s4 mounted on /users

# ls -a /users
.
..
lost+found

	*** check if new partition can read and write
# cp /etc/passwd /users/mount.test
# cat /users/mount.test

daemon:xxxxxxxxxxxxx:1:1::/:
bin:xxxxxxxxxxxxx:2:2::/bin:
	*** looks fine
	
# rm /users/mount.test

	*** update the mount entries in /etc/fstab
	*** to make this permanent
# cp /etc/fstab /etc/fstab.0
# fsentry -t 4.2 /dev/dsk/c2d0s4 /users
fsentry: could not mount /dev/dsk/c2d0s4
mount: /dev/dsk/c2d0s4 already mounted
--
Don.Gilbert at Iubio.Bio.Indiana.Edu
biocomputing office, indiana univ., bloomington, in 47405, usa