I fear that is correct saikiran_1984. I hit this myself a year ago when I was given a 9115-505 (p505) to set up for a client. It had a DVD-ROM (Read-Only) and so I refused until a DVD-RAM was installed. They are a few hundred pounds sterling, probably less than 1,000 US dollars.
The process I write the DVD with is a little convoluted, but I have a filesystem outside of rootvg that I create a file using the normal mksysb:-
mksysb -e /mksysbfs/mksysb.file
I then use the next command to actually write the removable media:-
mkdvd -d /dev/cd0 -m /mksysbfs/mksysb.file
Before actually running the mksysb to disk file, I also do the following:-
mkszfile #- recreate lv/fs information for rootvg
rm /disaster/*.pvlist 2>/dev/null
lspv|while read pv serial vg status
do
echo "$pv \c" >>/disaster/$vg.pvlist
echo "$pv $vg \r\c"
echo "$pv $vg" >> $log
sleep 1
done
for vg in `lsvg|sort|grep -v rootvg`
do
echo "\nSaving $vg structure"
lsvg -l $vg > /disaster/$vg.lsvg-l
echo "restvg -q -f /disaster/$vg.structure `cat /disaster/$vg.pvlist`" >>/disaster/restvg_commands
echo "^\./" > /etc/exclude.$vg # Ignore all the files
savevg -ef /disaster/$vg.structure $vg
if [ $? -ne 0 ]
then
echo "Failed to save $vg structure\n\nExiting"
exit 2
fi
done
Now, /disaster is a very small filesystem in rootvg, just 1PP and it holds these files so after a mksysb restore, I can run the commands in restvg_commands and it will build all the other volume groups, logical volumes, filesystems and mount them.
As a word of warning, this only really works if you have an identical machine to restore to (same hdisk numbers and sizes) but at least the structure information is there for you to work with too. I am working on a version that removes any mirrors in case you have a live machine with simple disks and a restore server with RAID or some other form of hardware protection.
Of course, if rootvg is what is corrupt and you are restoring over the original machine, you should be able to import the volume groups with importvg and they should recover with the original data.
I hope that this is useful. Testing something like this is very important. have you got DR hardware organised? There are many companies that will lend you hardware when you need it for an annual fee of about 10% of the base cost. It releives you of hardware headaches from having a second server at a second site and making sure no-one decides to use it for something else!
Let me know if you want a few names to get started with.
Robin
Liverpool/Blackburn
UK
