Romu,
You've hit on a real problem. Not only can SAN-attached disk be enumerated first,
also sometimes USB media (for physical installs). Or virtual media (if doing
remote installs off a remote access controller, or via PXE).
So using /ddev/disk/by-path/* is certainly one great way to solve this.
To get a concrete example of what others are saying, consider a Dell server.
Consistently, the 1st PERC vol seems to be enumerated as [0:2:0:0] on
M620s and R620s. Here's example output from lsscsi -g:
# lsscsi -g
[0:0:32:0] enclosu DP BACKPLANE 1.07 - /dev/sg0
[0:2:0:0] disk DELL PERC 6/i 1.22 /dev/sda /dev/sg1
[0:2:1:0] disk DELL PERC 6/i 1.22 /dev/sdb /dev/sg2
ks.cfg now allows /dev/disk/by-path/ and /dev/disk/by-id shell-like globs.
See http://fedoraproject.org/wiki/Anaconda/Kickstart, Special Notes for
Referring to Disks.
So /dev/disk/by-path/pci-*-usb-* captures all USB media,
/dev/disk/by-path/pci-*-scsi-* captures all PERC vols,
/dev/disk/by-path/pci-*-scsi-0:2:0:0 captures first PERC vol (on a M620),
/dev/disk/by-path/pci-*-fc-* captures all FC LUNs.
However, on other Dell server models, the first PERC volume varies. Sometimes it's
0:1:0:0.
So /dev/disk/by-path/pci-*-scsi-0:[1-9]:0:0 will be your first PERC volume on *any*
Dell server in the last decade or so.
Armed with this information, you can specify your boot disk in your ks.cfg.
...
%include /tmp/ignoredisk
# Partition and format the drives.
part /boot --fstype ext3 --size=100 --asprimary
But wait! What is this /tmp/ignoredisk file? It comes from your "%pre" section.
%pre
# This *definitely* works. See %include ignoredisk discussion above.
FIRST_PERC_VOL=$(ls -1 /dev/disk/by-path/pci-*-scsi-0:[1-9]:0:0 | grep -v usb)
echo "ignoredisk --only-use=$FIRST_PERC_VOL" > /tmp/ignoredisk
echo "clearpart --all --initlabel --drives=$FIRST_PERC_VOL" >> /tmp/ignoredisk
In summary, blacklisting kerrnel modules is simpler, but doesn't cover all the different
cases.
Doing as above covers all cases, but only for one particular server family.
Spike
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