During the " Examining Devices " phase of Fedora16 installer on a system with multipath, it will not detect an existing operating system even when one is present.

This was done using the following Fedora16 DVD installer
http://ppc.koji.fedoraproject.org/scratch/karsten/iso/RC3/ppc64/iso/Fedora-16-ppc64-DVD.iso

I am not able to do a "vnc" install with this media because it doesn't let me configure the IP address of my system.  Instead it skips that and launches the VNC session and gives an IP address that isn't valid for my network (172.16.254.252:1)

So instead I did a "serial" install (linux serial debug=1) and went through the text GUI menus.  However, with this install method I don't have an option for "Specialized Storage Devices".  I do have logs from a previous Fedora16 build where I was able to use the VNC installer (fc16 beta rc 6).  

== Comment: 2012.01.05 14:31:50 ==
Discovered a couple workarounds for the network config issue.  From the yaboot prompt use the
following kernel options

linux vnc debug=1 sshd=1 ip=<ip_address> netmask=<netmask_address>
gateway=<gateway_address> dns=<dns_address>

or 

linux vnc debug=1 sshd=1 asknetwork

== Comment: 2012.01.06 10:59:18 ==

[anaconda root@pfdioc03b tmp]# udevadm test --action=change  /devices/virtual/block/dm-8
run_command: calling: test
adm_test: version 173
parse_file: reading '/lib/udev/rules.d/10-dm.rules' as rules file
parse_file: reading '/lib/udev/rules.d/11-dm-lvm.rules' as rules file
parse_file: reading '/lib/udev/rules.d/13-dm-disk.rules' as rules file
parse_file: reading '/lib/udev/rules.d/40-libgphoto2.rules' as rules file
parse_file: reading '/lib/udev/rules.d/40-multipath.rules' as rules file
parse_file: reading '/lib/udev/rules.d/40-ppc.rules' as rules file
parse_file: reading '/lib/udev/rules.d/42-qemu-usb.rules' as rules file
parse_file: reading '/lib/udev/rules.d/50-firmware.rules' as rules file
parse_file: reading '/lib/udev/rules.d/50-udev-default.rules' as rules file
parse_file: reading '/lib/udev/rules.d/60-cdrom_id.rules' as rules file
parse_file: reading '/lib/udev/rules.d/60-floppy.rules' as rules file
parse_file: reading '/lib/udev/rules.d/60-net.rules' as rules file
parse_file: reading '/lib/udev/rules.d/60-pcmcia.rules' as rules file
parse_file: reading '/lib/udev/rules.d/60-persistent-alsa.rules' as rules file
parse_file: reading '/lib/udev/rules.d/60-persistent-input.rules' as rules file
parse_file: reading '/lib/udev/rules.d/60-persistent-serial.rules' as rules file
parse_file: reading '/lib/udev/rules.d/60-persistent-storage-tape.rules' as rules file
parse_file: reading '/lib/udev/rules.d/60-persistent-storage.rules' as rules file
parse_file: reading '/lib/udev/rules.d/60-persistent-v4l.rules' as rules file
parse_file: reading '/lib/udev/rules.d/61-accelerometer.rules' as rules file
parse_file: reading '/lib/udev/rules.d/64-md-raid.rules' as rules file
parse_file: reading '/lib/udev/rules.d/65-libsane.rules' as rules file
parse_file: reading '/lib/udev/rules.d/65-md-incremental.rules' as rules file
parse_file: reading '/lib/udev/rules.d/69-cd-sensors.rules' as rules file
parse_file: reading '/lib/udev/rules.d/70-anaconda.rules' as rules file
parse_file: reading '/etc/udev/rules.d/70-persistent-cd.rules' as rules file
parse_file: reading '/etc/udev/rules.d/70-persistent-net.rules' as rules file
parse_file: reading '/lib/udev/rules.d/70-uaccess.rules' as rules file
parse_file: reading '/lib/udev/rules.d/70-wacom.rules' as rules file
parse_file: reading '/lib/udev/rules.d/71-seat.rules' as rules file
parse_file: reading '/lib/udev/rules.d/73-seat-late.rules' as rules file
parse_file: reading '/lib/udev/rules.d/75-cd-aliases-generator.rules' as rules file
parse_file: reading '/lib/udev/rules.d/75-net-description.rules' as rules file
parse_file: reading '/lib/udev/rules.d/75-persistent-net-generator.rules' as rules file
parse_file: reading '/lib/udev/rules.d/75-probe_mtd.rules' as rules file
parse_file: reading '/lib/udev/rules.d/75-tty-description.rules' as rules file
parse_file: reading '/lib/udev/rules.d/77-mm-ericsson-mbm.rules' as rules file
parse_file: reading '/lib/udev/rules.d/77-mm-longcheer-port-types.rules' as rules file
parse_file: reading '/lib/udev/rules.d/77-mm-pcmcia-device-blacklist.rules' as rules file
parse_file: reading '/lib/udev/rules.d/77-mm-platform-serial-whitelist.rules' as rules file
parse_file: reading '/lib/udev/rules.d/77-mm-simtech-port-types.rules' as rules file
parse_file: reading '/lib/udev/rules.d/77-mm-usb-device-blacklist.rules' as rules file
parse_file: reading '/lib/udev/rules.d/77-mm-x22x-port-types.rules' as rules file
parse_file: reading '/lib/udev/rules.d/77-mm-zte-port-types.rules' as rules file
parse_file: reading '/lib/udev/rules.d/77-nm-olpc-mesh.rules' as rules file
parse_file: reading '/lib/udev/rules.d/78-sound-card.rules' as rules file
parse_file: reading '/lib/udev/rules.d/80-drivers.rules' as rules file
parse_file: reading '/lib/udev/rules.d/80-mm-candidate.rules' as rules file
parse_file: reading '/etc/udev/rules.d/91-drm-modeset.rules' as rules file
parse_file: reading '/lib/udev/rules.d/95-cd-devices.rules' as rules file
parse_file: reading '/lib/udev/rules.d/95-dm-notify.rules' as rules file
parse_file: reading '/lib/udev/rules.d/95-keyboard-force-release.rules' as rules file
parse_file: reading '/lib/udev/rules.d/95-keymap.rules' as rules file
parse_file: reading '/lib/udev/rules.d/95-udev-late.rules' as rules file
parse_file: reading '/run/udev/rules.d/99-live-mount.rules' as rules file
parse_file: reading '/lib/udev/rules.d/99-systemd.rules' as rules file
udev_rules_new: rules use 153168 bytes tokens (12764 * 12 bytes), 27993 bytes buffer
udev_rules_new: temporary index used 50120 bytes (2506 * 20 bytes)
udev_device_new_from_syspath: device 0x100235d0650 has devpath '/devices/virtual/block/dm-8'
udev_device_new_from_syspath: device 0x100235db410 has devpath '/devices/virtual/block/dm-8'
udev_device_read_db: device 0x100235db410 filled with db file data
udev_rules_apply_to_event: LINK 'mapper/mpathbp3' /lib/udev/rules.d/10-dm.rules:114
udev_rules_apply_to_event: RUN 'socket:/org/kernel/dm/multipath_event' /lib/udev/rules.d/40-multipath.rules:16
udev_rules_apply_to_event: GROUP 6 /lib/udev/rules.d/50-udev-default.rules:68
udev_event_execute_rules: no node name set, will use kernel supplied name 'dm-8'
udev_node_add: creating device node '/dev/dm-8', devnum=253:8, mode=0660, uid=0, gid=6
udev_node_mknod: preserve file '/dev/dm-8', because it has correct dev_t
udev_node_mknod: preserve permissions /dev/dm-8, 060660, uid=0, gid=6
node_symlink: preserve already existing symlink '/dev/block/253:8' to '../dm-8'
link_find_prioritized: found 'b253:8' claiming '/run/udev/links/mapper\x2fmpathbp3'
link_update: creating link '/dev/mapper/mpathbp3' to '/dev/dm-8'
node_symlink: preserve already existing symlink '/dev/mapper/mpathbp3' to '../dm-8'
udev_device_update_db: created db file '/run/udev/data/b253:8' for '/devices/virtual/block/dm-8'
This program is for debugging only, it does not run any program,
specified by a RUN key. It may show incorrect results, because
some values may be different, or not available at a simulation run.

UDEV_LOG=6
DEVPATH=/devices/virtual/block/dm-8
MAJOR=253
MINOR=8
DEVNAME=/dev/dm-8
DEVTYPE=disk
ACTION=change
SUBSYSTEM=block
DM_SBIN_PATH=/sbin
DM_UDEV_DISABLE_DISK_RULES_FLAG=1
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
DM_NAME=mpathbp3
DM_UUID=part3-mpath-35000c50017b69adf
DM_SUSPENDED=0
DEVLINKS=/dev/mapper/mpathbp3
MPATH_SBIN_PATH=/sbin
TAGS=:systemd:
run: 'socket:/org/kernel/dm/multipath_event'

<dlehman> that's what we want
<dlehman> is one of the mpath's paths failed?
<hamzy> like disk error?
<dlehman> the device-mapper rules are setting a flag that means anaconda's rules, along with many other standard rules, should ignore these devices
<dlehman> the flag is DM_UDEV_DISABLE_DISK_RULES_FLAG
<dlehman> I'll just paste the udev rules that can set that flag
<dlehman> ENV{DM_UUID}=="mpath-?*", ENV{DM_ACTION}=="PATH_FAILED", GOTO="dm_disable"
<dlehman> ENV{DM_UUID}=="CRYPT-TEMP-?*", GOTO="dm_disable"
<dlehman> ENV{DM_UUID}!="?*", ENV{DM_NAME}=="temporary-cryptsetup-?*", GOTO="dm_disable"
<dlehman> ENV{DISK_RO}=="1", GOTO="dm_disable"
<dlehman> so, I don't know exactly how any of those work, but it looks like: a failed path in an mpath, a temporary cryptsetup device node, or a read-only disk
<hamzy> the SAS card is saying that the multipath path has failed?
<dlehman> DM_ACTION==PATH_FAILED sounds to me like one of the disks/paths became unavailable

== Comment  2012.01.16 15:16:54 ==
I formatted the two hard drives as pdisk and created a RAID 0 array.  I was then able to do an installation of Fedora16 onto the RAID 0 array without issues.  However, we're still hitting this bug when trying to do an install over the existing one.  The installer doesn't detect the existing installation and prompt the user. 

Also, the system that's displaying these issues is being replaced but I'm going to talk to our hardware coordinator to make sure we get the same type of SAS RAID configuration on the new system so we can continue this effort.

== Comment: #5 - 2012.01.23 10:34:22 ==
The installer is running in a multipath environment at the first screen.  I then ssh into the system to poke around.  I notice that, if I enable multipath, then I do not see any problems with udev.

[anaconda root@pfdioc03b ~]# cat << __EOF__ > /etc/multipath.conf
# multipath.conf written by anaconda

defaults {
        user_friendly_names yes
}
blacklist {
        devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
        devnode "^hd[a-z]"
        devnode "^dcssblk[0-9]*"
        device {
                vendor "DGC"
                product "LUNZ"
        }
        device {
                vendor "IBM"
                product "S/390.*"
        }
        # don't count normal SATA devices as multipaths
        device {
                vendor  "ATA"
        }
        # don't count 3ware devices as multipaths
        device {
                vendor  "3ware"
        }
        device {
                vendor  "AMCC"
        }
        # nor highpoint devices
        device {
                vendor  "HPT"
        }
}
multipaths {
}
__EOF__
[anaconda root@pfdioc03b ~]# multipath
create: mpatha (1IBM     IPR-0   1B87E0C4CEFF65C4) undef IBM,IPR-0   1B87E0C4
size=260G features='1 queue_if_no_path' hwhandler='1 alua' wp=undef
|-+- policy='round-robin 0' prio=50 status=undef
| `- 1:255:0:0 sdb 8:16 undef ready running
`-+- policy='round-robin 0' prio=10 status=undef
  `- 0:255:0:0 sda 8:0  undef ready running
[anaconda root@pfdioc03b ~]# dmsetup status -v | egrep "(Name|State)"
Name:              mpathap2
State:             ACTIVE
Name:              mpathap1
State:             ACTIVE
Name:              mpatha
State:             ACTIVE
Name:              live-rw
State:             ACTIVE
Name:              mpathap3
State:             ACTIVE
[anaconda root@pfdioc03b ~]# for ((i = 0; i <= 4; i = i + 1)) do echo "=== dm-$i ==="; udevadm test --action=change  /devices/virtual/block/dm-$i 2>&1 | grep DM_UDEV; done
=== dm-0 ===
DM_UDEV_DISABLE_LIBRARY_FALLBACK_FLAG=1
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
=== dm-1 ===
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
=== dm-2 ===
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
=== dm-3 ===
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
=== dm-4 ===
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2


I then navigate the installer to select the multipath device and where it should detect the previously installed system.  However, it is now at the hostname screen.

[anaconda root@pfdioc03b ~]# dmsetup status -v | egrep "(Name|State)"
Name:              mpathap2
State:             ACTIVE
Name:              mpathap1
State:             ACTIVE
Name:              mpatha
State:             ACTIVE
Name:              live-rw
State:             ACTIVE
Name:              mpathap3
State:             ACTIVE
[anaconda root@pfdioc03b ~]# for ((i = 0; i <= 4; i = i + 1)) do echo "=== dm-$i ==="; udevadm test --action=change  /devices/virtual/block/dm-$i 2>&1 | grep DM_UDEV; done
=== dm-0 ===
DM_UDEV_DISABLE_LIBRARY_FALLBACK_FLAG=1
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
=== dm-1 ===
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
=== dm-2 ===
DM_UDEV_DISABLE_DISK_RULES_FLAG=1
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
=== dm-3 ===
DM_UDEV_DISABLE_DISK_RULES_FLAG=1
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
=== dm-4 ===
DM_UDEV_DISABLE_DISK_RULES_FLAG=1
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2

Notice that udev now has the DM_UDEV_DISABLE_DISK_RULES_FLAG flag set?