From: farrokh@alisa.ucla.edu (Farrokh Najmabadi)
Subject: Third party disks: Problem adding a second swap space 
Organization: ucla
Date: 27 Aug 92 10:15:10 PDT

I have problem adding partition b of a Fujitsu M2266SA disk drive as the second
swap space to my machine.  I have a DecStation 5000/200 and using Ultrix 4.2A.
The kernel is configured with a second swap space and I am confident the
problem is not there (I can add a second swap space on a DEC disk drive).  The
problem is with /etc/swapon (or some routines called by that) refusing to start
a swap space on partition b of the Fujitsu drive.  Below is a detailed
description of the problem.  Your help would be appreciated.

Farrokh Najmabadi
najmabadi@fusion.ucla.edu



I purchased recently a Fujitsu M2266SA disk drive which I have installed in a
DEC BA-42 expansion box together with a DEC RZ57 drive.  The Fujitsu disk came
formatted.  The manual that came with the drive lists the no. of cylinders
to be 1658, no. of heads to be 15, and no. of sectors to be 85.  I made the
following table and included it in the /etc/disktab file

m2266sa|M2266SA|M2266S-512|FUJITSU M2266S-512 Winchester:\
        :ty=winchester:ns#85:nt#15:nc#1658:\
        :pa#32768:ba#8192:fa#1024:\
        :pb#131072:bb#4096:fb#1024:\
        :pc#2107704:bc#8192:fc#1024:\
        :pd#299604:bd#8192:fd#1024:\
        :pe#299604:be#8192:fe#1024:\
        :pf#447720:bf#8192:ff#1024:\
        :pg#447720:bg#8192:fg#1024:\
        :ph#449216:bh#8192:fh#1024:

Then, I ran newfs to build the file system on the partition a of the device and
made the following partition table:

/dev/rrz1a
Current partition table:
partition     bottom        top       size    overlap
    a              0      32767      32768    c
    b          32768     163839     131072    c
    c              0    2107703    2107704    a,b,d,e,f,g,h
    d         163840     463443     299604    c
    e         463444     763047     299604    c
    f         763048    1210767     447720    c
    g        1210768    1658487     447720    c
    h        1658488    2107703     449216    c


I then build file systems on each partitions (d through h).  The Fujitsu drive
is working fine.  I ran disk exerciser program on all of the partitions (b
through h) and there was 0 fault rate. Now, I have file systems mounted on
each of partitions d through h and they are fine.  

The only problem is that the system refuses to swap of the partition b.

The Kernel is built with a second swap space on rz1b.  During the booting I get
error messages regarding the second swap space (transcript follows ), even
though the system gets booted and works properly with exception of the second
swap space.  Trying to add the second swap space after booting with
	/etc/swapon -a 
will result in
	Adding /dev/rz1b as swap device
	/dev/rz1b: No such device

Even though /dev/rz1b does exist and I have even mounted file systems to that
partition (to see if it is really recognized by the operating system) and could
read and write to it.  I have got the same results when I attached this disk
drive to a system that runs ULTRIX 4.2 (not 4.2A).


(messages on console during booting):
ULTRIX V4.2A (Rev. 47) System #1: Mon Aug 17 14:49:18 PDT 1992
real mem = 41943040
avail mem = 34750464
using 1024 buffers containing 4194304 bytes of memory
KN02 processor - system rev 32
cpu0 ( version 2.0, implementation 2 )
fpu0 ( version 3.0, implementation 3 )
asc0 at ibus5
rz0 at asc0 slave 0 (RZ57)
rz1 at asc0 slave 1 (RZxx) [ FUJITSU M2266S-512       0020 ]
tz4 at asc0 slave 4 (TZxx) [ WangDAT Model 1300       01.9 ]
ln0 at ibus6
ln0: DEC LANCE Ethernet Interface, hardware address: 08:00:2b:23:6b:8d 
dc0 at ibus7
px0 at ibus0
pa0 (5x1 8+8+0+0)
ufs_swapconf: Can not open swap device (21,9)   <=  First Error Message
.....
	fsck reporting that all file systems were unmounted cleanly
......
        Second error message when /etc/rc tries to add the swap device  <=
Adding /dev/rz1b as swap device                 <=
/dev/rz1b: No such device                       <=

...

	Booting is completed.


Xref: sparky comp.unix.ultrix:6485 alt.security:4212 comp.security.misc:1098