[SOLVED] RAID: pvcreate, devices /dev/md0 not found

zidarsk8 · 2012-09-02 21:21:30

Hi,

For the past 3 days i've been trying to install arch linux on my new UEFI system with 15TB of hard drives. And I'm having all sorts of problems

First time I went through Software Raid and LVM everything worked nicely, but because I've messed up some other stuff I had to redo that part a few times.

Now, I clean up my hard drives with

mdadm --misc --stop /dev/md0
mdadm --misc --zero-superblock /dev/sd[abcde]3 #all my raid partitions
and i dd /dev/zero to the first of each disk,

then I repeat the procedure on this wiki: https://wiki.archlinux.org/index.php/So … stallation

but when i get to

pvcreate i get a: Device /dev/md0 not found (or ignored by filtering)

and if i ls dev folder i see md0, but i also see md0p1, md0p2, md0p3, md0p4, whichs seems weird and i can call pvcreate on those, but i though that was uppose to be a clean disk.

Any help please, on how to clean everything up?
i don't know if dd /dev/zero to all hard drives would work, but even if it would that would take forever to erase 15TB with around 100MB/s

Last edited by zidarsk8 (2012-09-03 17:35:38)

fukawi2 · 2012-09-03 00:25:07

Try wiping out the first few MB of the RAID array:

dd if=/dev/zero of-/dev/md0 bs=1M count=32

zidarsk8 · 2012-09-03 17:35:11

Not sure if this did the trick, but i dded zeros all over the place, and now it works

fukawi2 · 2012-09-03 23:18:49

lol, zero all the things!!!11

Arch Linux

#1 2012-09-02 21:21:30

[SOLVED] RAID: pvcreate, devices /dev/md0 not found

#2 2012-09-03 00:25:07

Re: [SOLVED] RAID: pvcreate, devices /dev/md0 not found

#3 2012-09-03 17:35:11

Re: [SOLVED] RAID: pvcreate, devices /dev/md0 not found

#4 2012-09-03 23:18:49

Re: [SOLVED] RAID: pvcreate, devices /dev/md0 not found

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