Arch Linux

The_Connaisseur

Member

From: Germany, various parts of it.

Registered: 2006-08-10

Posts: 12

mdadm mkinitcpio hook -- md devices need to build before LVM2 hook tri

Today I tripped over a nasty flaw inside the mdadm package in the hooks file of mdadm to be precise.

Given is a md raid1 device (md0), then put onto this a LVM2 volume group, with logical devices, filesystems and somesuch.

Got created the matching lines in /etc/fstab.

Then tried the first self hosted boot. --> BOOOM. Hang. Emergency shell. --> Volume group not activated.

Checked all entries in /etc/mkinitcpio.conf for HOOKS with mdadm && lvm2:

HOOKS="base udev autodetect modconf block mdadm lvm2 filesystems keyboard fsck shutdown"

plus

MODULES="ext4 md_mod raid1"

After subsequent failing boots I've checked the build / activation order of the initrd w/ lsinitcpio. Found out, that LVM2 had a early run hook, but not the mdadm!

Changed the matching function from

run_hook()

to

run_earlyhook()

for the mdadm hooks file. Build my initrd, booted and everything worked as planned.

Just FYI.

A Bug is filed against mdadm package, if anybody cares: FS#49071

--connaisseur.

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Prefer anything that tastes like UNIX and beer.