r_pns
n00b
Joined: 02 Jul 2006
Posts: 33
|
 Posted: Fri Jun 07, 2019 2:05 am Post subject: mdadm-4 and initramfs |
 |
|
I've used for years the following code in initramfs/init:
| Code: | mdadm --assemble /dev/md_d3 -u SOME_UUID
mount -o ro /dev/md_d3p1 /root
|
That is, /root is mounted to a partition of a paritionable MD RAID array. This still works with mdadm-3.4.
But trying to upgrade initramfs to mdadm-4.1, I've got quite a strange result. Initially, mdadm in intitramfs creates something like that:
| Code: | brw-rw---- 9, 3 /dev/md3
brw-rw---- 9, 4 /dev/md3p1
lrwxrwxrwx 12 md_d3p1 -> /dev/md3p1
|
The array /dev/md3 is then up and running, but
| Code: | mdadm --detail /dev/md3p1
|
says
| Code: | Array associated with md device /dev/md3p1 does not exist
|
Clearly, /dev/md3p1 cannot be mounted. I've also tried auto=mdp option for mdadm to no avail.
But AFTER this failure (from the intramfs busybox shell), I'm SOMETIMES able to manually assemble the array and successfully mount the fs the following way:
| Code: | mdadm --stop /dev/md3
rm -r /dev/md*
mdadm --assemble /dev/md_d3 --auto=mdp3 -u SOME_UUID
|
Now, I have quite different device names and numbers:
| Code: | brw-rw---- 254, 192 /dev/md_d3
brw-rw---- 254, 193 /dev/md_d3p1
|
Henceforth , the partition md_d3p1 can be mounted successfully.
Many thanks for any help! |
|
Kernel & Hardware
