Red Hat Bugzilla – Bug 246817
dmraid forced upon install
Last modified: 2008-06-16 21:47:41 EDT
Description of problem:
Installer insists on using /dev/mapper/mapper0 to use as the install target
while there are no dmraid devices configured.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Using a K8N-DL mobo and two SATA HD's connected to the Nvidia CK804 SATA
controller, attempt to install.
2. During the install process, you will be prompted multiple times to
initialize /dev/mapper/mapper0 even though no dmraid devices are enabled.
3. Installer will not allow you to disable dmraid device.
4. Installer will fail when attempting to partition non-existent device.
Installer should either allow you to disable the dmraid option under the button
"advanced storage configuration" or just allow me to use /dev/sda and /dev/sdb
Using the kernel option 'nodmraid' has no effect on this bug, which may be
another bug alltogether.
Created attachment 158574 [details]
dmesg of livecd boot
Created attachment 158575 [details]
lspci -vv output on target machine
The installer from the live CD installation doesn't allow me to select /dev/sda
and /dev/sdb even though they are present in the system.
Starting dmraid shows that no disks are present:
[root@localhost ~]# dmraid -a y
No RAID disks
Disconnecting /dev/sdb from my system allows the install to proceed normally on
/dev/sda. However the whole point of this exercise was to install a system with
S/W raid 1.
I have now tested the three SATA fake-raid controllers at my disposal. I have a
ck804 and SiL 3118 onboard. I also tested a 1210SA that I had lying around.
All three fail on filesystem creation and cause the installer to exit.
They all fail slightly differently and I possibly need to open a new ticket on
each controller. At this point, I cannot use the raid controllers that I have
at my disposal with Fedora 7 nor can I install in a s/w raid configuration as
the /dev/mapper s/w forces itself upon me without giving me a choice.
In addition, when I install the system with one hard disk, I can't create a
broken raid 1 so that I could later add a second drive(the installer tells me
that a RAID 1 needs two devices and won't let me override it).
Sorry if this is a bit of a rambling diatribe, I would love to debug this
further if possible. How should I begin to debug?
If you add 'nodmraid' to your boot command line (or run liveinst --nodmraid),
then you should be able to override the use of dmraid. Does that not work?
the nodmraid option on the kernel command line didn't help when I last tried it,
i.e. the installer still assumed that I wanted to use /dev/mapper stuff.
Someone else suggested that I try "nompath" to get around this issue.
I didn't know that the liveinst app had command line arguments, what other
options are there?
The liveinstaller seems to ignore the --nodmraid option on my machine:
Just to be certain that I did blow away the superblock:
[root@localhost ~]# dmraid -a y
No RAID disks
I also tried --nompath as suggested on the mailing list, and it failed as well.
Created attachment 158706 [details]
dmesg output of kernel boot with nodmraid and nompath options
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