Red Hat Bugzilla – Bug 79896
grubby --bootloader-probe fails to find lilo with software raid
Last modified: 2007-04-18 12:49:07 EDT
From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2.1) Gecko/20021130 Description of problem: Versions 21.4.3 and up of lilo have support for automatically working out where to install the bootloader in RAID 1 setups. This allows you to set boot=/dev/mdX (where mdX is the /boot partition) and have lilo automatically install the bootloader to the boot sectors of the drives making up the RAID array. See http://www.elliott-turbo.com/lilo/. When lilo.conf includes the line boot=/dev/mdX, 'grubby --bootloader-probe' will fail to return 'lilo' as expected since the bootloader has been installed to /dev/hdX instead of /dev/mdX. If the lilo.conf file is changed so boot=/dev/hdX, 'grubby --bootloader-probe' works as expected (returning 'lilo'). This problem prevents kernel and other upgrades from reinstalling lilo when required. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Install Red Hat with a RAID 1 mirrored /boot partition. 2. Setup lilo using boot=/dev/mdX and install. 3. Run grubby --bootloader-probe which will not return anything. 4. Setup lilo using boot=/dev/hdX and reinstall. 5. Run grubby --bootloader-probe. This will now return 'lilo'. Actual Results: Step 3: #grubby --bootloader-probe <returns nothing> Expected Results: Step 3: #grubby --bootloader-probe lilo Additional info:
I've just done a little investigation into the source for grubby and the problem is that bootSect is read from the first 512 bytes of /dev/mdX, whereas lilo actually installs itself to the boot sectors of the drives making up /dev/mdX (e.g. /dev/hda and /dev/hdb). When boot is set to /dev/hda in lilo.conf, grubby works correctly as bootSect is read from the first 512 bytes of /dev/hda.
do you have a correct /etc/raidtab sitting around?
Created attachment 89363 [details] My /etc/raidtab I've attached my current /etc/raidtab. With this RAID 1 setup 'grubby --bootloader-probe' fails.
this should be fixed in mkinitrd > 3.4.43 -- want me to send you an rpm to test?
Yes please.
http://people.redhat.com/~katzj/mkinitrd/ has the newer package.
Thanks. The new version returns the correct result on my RAID 1 setup using lilo. Will this fix be made available as an errata package for Redhat 8.0?