> > I've spent most of the weekend trying to install AIX 5.2 on a used IBM
> > RS/6000 7025 F50 server. Initially there was a hardware problem (loose
> > cable I think), but finally I got the system up and running.
> > The machine has 3 x 4.5 Gb disks. When I installed the OS, I selected
> > all 3 disks for installation. I was rather surprised it never gave me
> > any chance to select partition names, sizes etc. But once installation
> > was finished I now have this situation.
> > # df -g
> > Filesystem GB blocks Free %Used Iused %Iused Mounted on
> > /dev/hd4 0.02 0.01 62% 1484 19% /
> > /dev/hd2 0.93 0.01 99% 26767 11% /usr
> > /dev/hd9var 0.02 0.01 43% 451 12% /var
> > /dev/hd3 0.02 0.02 4% 52 1% /tmp
> > /dev/hd1 0.01 0.01 4% 18 1% /home
> > /proc - - - - - /proc
> > /dev/hd10opt 0.02 0.00 100% 584 10% /opt
> > /dev/cd0 0.56 0.00 100% 292579 100% /mnt
> > Ignoring the 560 Mb cdrom which I've got mounted on /mnt, the total
> > disk space allocated seems 1.02 Gb, which is not a lot considering the
> > disks have a total capacity of 13.5 Gb. I believe the swap partition
> > is 512 Mb in AIX 5.2, but that still leaves another 12 Gb unaccounted
> > for.
> > As someone who knows Solaris reasonably well, this seems odd. Perhaps
> > someone can explain to me what is happening here.
> This is normal for AIX. AIX contains a logical volume manager in the
> base OS. All filesystems can be enlarged at will, nondisruptively, so
> the installer creates them at the minimum size.
Quite neat I must say!
Quote:> If you enter "lsvg rootvg" you should see the space you really have.
# lsvg rootvg
VOLUME GROUP: rootvg VG IDENTIFIER:
VG STATE: active PP SIZE: 8 megabyte(s)
VG PERMISSION: read/write TOTAL PPs: 1611 (12888
MAX LVs: 256 FREE PPs: 1414 (11312
LVs: 11 USED PPs: 197 (1576
OPEN LVs: 10 QUORUM: 2
TOTAL PVs: 3 VG DESCRIPTORS: 3
STALE PVs: 0 STALE PPs: 0
ACTIVE PVs: 3 AUTO ON: yes
MAX PPs per PV: 1016 MAX PVs: 32
LTG size: 128 kilobyte(s) AUTO SYNC: no
HOT SPARE: no BB POLICY: relocatable
Whilst I've not read the documentation yet, I can see those numbers
make a lot more sence.
Quote:> As you chose all 3 disks at installation time you now have a root volume
> group which contains them all. This may not be the best setup.
Thanks for that. I really did not have much idea what I was doing -
this is my first play with IBM UNIX boxes. I have quite a range of
UNIX hardware for testing software - Solaris, Linux, OpenBSD, NetBSD,
HP-UX, Tru64, AIX of course and soon IRIX. However, Solaris is the
only one I'm reasonably confortable with - since I've been using it a
> it is not fixed and it is possible to rearrange things to a large extent
> without any backup/restore or even rebooting.
That's good. I will want to remove at least one of the 4.5 Gb disks
and replace it/them with something bigger. I only have 3 caddies (or
whatever they are called), so to add a disk, I need to remove one,
despite the fact the machine can take 6 disks in its present state and
18 if I add some hardware. It's only for a home computer, so I don't
need any more space.
Quote:> I suggest that you read up on the LVM. It is one of the areas where AIX
> differs greatly from Solaris.
Will do. I'll try to find a book on AIX.
Quote:> IMHO the LVM is one of the things in AIX which is noticeably superior to
> what Solaris offers. Another is mksysb, which is worth looking at if you
> have a tape drive (or DVD writer) in your system. It is a facility to
> make a directly bootable system backup which can be restored just by
> booting the tape (RS/6000s will boot from tape, unlike SPARCs).
mksysb is interesting. There will not be any data of any great value
on the machine, but it does have a 24 Gb DDS-3 tape drive, so I'll
look at that.
Old versions of SunOs are bootable from tape, but as you rightly say,
that is not the case with Solaris. That is a retrograde step I feel.
My Sun has a 40 Gb DDS-4 tape drive with a 'One button disaster'
facility, but in practice that is no use on Solaris without other
software - Veritas probably, although I've not looked at it.
Quote:> Good luck with AIX,
It looks like I'm going to need it. I seem to have hit more problems
during the install phase than I did with HP-UX or Tru64, both of which
are new to me too.
Dr. David Kirkby,
Senior Research Fellow,
Department of Medical Physics,
University College London,
11-20 Capper St, London, WC1E 6JA.
Tel: 020 7679 6408 Fax: 020 7679 6269
Internal telephone: ext 46408