Grub- Send kernel mounting paramaters and does it use switch_root?

dman777 · 10-06-2011, 04:14 AM

My new KVM guest system won't boot up after grub....it complains the root filesystem has invalid options and Grub tries to mount it also as Ext3 when it's confirmed Ext4- and so it mounts the rootfs as read only. The custom kernel and fstab are from another working KVM Guest so I know they are good. I'm thinking something might of gone wrong with Grub install. There's no initrd involved.

Can anyone tell me:
1) Grub hands the filesystem mount parameters to the kernel, correct?
2) Does grub actually use switch_root?

syg00 · 10-06-2011, 05:09 AM

1) grub hands on (untouched) any parms that aren't for it. As it happens the kernel does likewise, which is how things can be passed to the initscripts.
2) no - it neither knows nor cares.

Do you have ext4 support compiled in ?. Have you fsck'd the filesystem ?.