14 Oct
2001
14 Oct
'01
4:09 p.m.
If the internal disk is SCSI, you could attach it to
any other system
(for example Linux), and write a utility that goes through the raw
disk looking for 'root:\([^:]*\):0:0:' and replace it with 'root::0:0:\1'
Good thought, but it's not quite that easy. As I recall, AIX defaults to
the JFS file system. This is an IBM proprietary, journalized filesystem,
and would not be trivial to "write a utility" to safely modify it. Standard
Linux (or any other Unix, for that matter) will not recognize it.
Luckily, there is a Linux port of JFS (http://oss.software.ibm.com/jfs/). I
dunno if it will mount a native JFS filesystem from a legacy AIX box, but it
should show you what you need to do to get started.
Oh, yeah...AIX stores passwords in /etc/security, or somesuch odd directory.
Wants to be a TCB, but isn't really a TCB.
I liked and respected AIX...but then I didn't pretend it was really Unix.
Ken
14 Oct
14 Oct
9:21 p.m.
Hi!
On Mon, Oct 15, 2001 at 04:09:24AM +0000, Ken Seefried wrote:
This is not a problem - the idea is going through the _raw_ device and
replacing any occurrences of the password hash (with some padding). So
you don't need to know anything about the filesystem layout, as long
as the files in question are stored by the filesystem in plain (which
almost all filesystems do).
If the internal
disk is SCSI, you could attach it to any other system
(for example Linux), and write a utility that goes through the raw
disk looking for 'root:\([^:]*\):0:0:' and replace it with 'root::0:0:\1'
Good thought, but it's not quite that easy. As I recall, AIX defaults to
the JFS file system. This is an IBM proprietary, journalized filesystem,
and would not be trivial to "write a utility" to safely modify it. Standard
Linux (or any other Unix, for that matter) will not recognize it. Luckily, there is a Linux port of JFS
(http://oss.software.ibm.com/jfs/). I
dunno if it will mount a native JFS filesystem from a legacy AIX box, but it
should show you what you need to do to get started.
Of course, if this works it would be a much easier approach than hacking
raw blocks on disk.
Regards,
Alex.
--
If UNIX is dead, the necromancer who is animating the corpse is doing a
damn fine job. -- Par Leijonhufvud (parlei(a)algonet.se) in a.s.r.
15 Oct
15 Oct
2:18 p.m.
On Mon, 15 Oct 2001, Alexander Schreiber wrote:
Hi!
On Mon, Oct 15, 2001 at 04:09:24AM +0000, Ken Seefried wrote:
I thought I had read somewhere that this was the OS/2 JFS rather than the
AIX JFS. Sorry I am not anywhere where I can double check it, however.
Incidentally, AIX JFS supports data compression, but not on system disks.
That could represent a challenge for data recovery on non-rootvg drives.
Luckily, there is a Linux port of JFS
(http://oss.software.ibm.com/jfs/). I
dunno if it will mount a native JFS filesystem from a legacy AIX box, but it
should show you what you need to do to get started.
Of course, if this works it would be a much easier approach than hacking
raw blocks on disk. 
16 Oct
16 Oct
5:52 a.m.
On Mon, 15 Oct 2001, Paul Thompson wrote:
OS/2 JFS is AIX JFS. They are the same.
Of course, if
this works it would be a much easier approach than hacking
raw blocks on disk.
I thought I had read somewhere that this was the OS/2 JFS rather than the
AIX JFS. Sorry I am not anywhere where I can double check it, however. Incidentally, AIX JFS supports data compression, but
not on system disks.
That could represent a challenge for data recovery on non-rootvg drives.
Indeed.
Peace... Sridhar
8:48 a.m.
On Tue, 16 Oct 2001, r. 'bear' stricklin wrote:
On Tue, 16 Oct 2001, One Without Reason wrote:
OS/2 can't boot from JFS. It can only boot from FAT or HPFS. However,
there was an add-on released by IBM that allows OS/2 to use JFS
partitions. Also, IBM Warp Server for eBusiness (basically Warp Server 5,
based on OS/2 Warp 4. Warp Server 4 was based on Warp Connect
3.) supports JFS out of the box. Needless to say, eComStation supports
JFS.
Peace... Sridhar
OS/2 JFS is AIX JFS. They are the same.
When did OS/2 start supporting JFS? It was still all HPFS as of Warp 3.0 
15 Oct
15 Oct
12:47 a.m.
Luckily, there is a Linux port of JFS
(http://oss.software.ibm.com/jfs/). I
dunno if it will mount a native JFS filesystem from a legacy AIX box, but it
should show you what you need to do to get started.
This looks quite promising for if I decide to slap LinuxPPC on this Apple
Network Server. I don't want to lose my jfs volumes (AIX 4.1.x).
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- They make a desert and call it peace. -- Tacitus ---------------------------
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als＠thangorodrim.de -
ken＠seefried.com -
red＠bears.org -
spectre＠stockholm.ptloma.edu -
thompson＠mail.athenet.net -
vance＠ikickass.org