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kaizoku

Member

Registered: 2009-01-09

Posts: 62

Questions on mdadm

I came across this article http://www.uplinkzero.com/howto/arch_li … tion_guide

I have a few questions to ask.

What is the difference between that setup and just using 1 array.

[root@archlive ~]# mdadm --create --verbose /dev/md1 --level=1 --raid-devices=2 /dev/sda1 /dev/sdb1
[root@archlive ~]# mdadm --create --verbose /dev/md2 --level=1 --raid-devices=2 /dev/sda2 /dev/sdb2
[root@archlive ~]# mdadm --create --verbose /dev/md3 --level=0 --raid-devices=2 /dev/sda3 /dev/sdb3
[root@archlive ~]# mdadm --create --verbose /dev/md4 --level=0 --raid-devices=2 /dev/sda4 /dev/sdb4
[root@archlive ~]# mkfs.ext2 /dev/md1
[root@archlive ~]# mkfs.ext3 /dev/md3
[root@archlive ~]# mkreiserfs /dev/md4
[root@archlive ~]# mkswap /dev/md2
[root@archlive ~]# swapon /dev/md2

compared to

[root@archlive ~]# mdadm --create --verbose /dev/md0 --level=0 --raid-devices=2 /dev/sda /dev/sdb
[root@archlive ~]# cfdisk /dev/md0
[root@archlive ~]# mkfs.ext2 /dev/md0p1
[root@archlive ~]# mkfs.ext3 /dev/md0p3
[root@archlive ~]# mkreiserfs /dev/md0p4
[root@archlive ~]# mkswap /dev/md0p2
[root@archlive ~]# swapon /dev/md0p2

Also it says "/boot must be RAID1", why so?

lilsirecho

Veteran

Registered: 2003-10-24

Posts: 5,000

Re: Questions on mdadm

Boot must be on a separate device......

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_AA_

Member

From: Maidstone, UK

Registered: 2008-07-14

Posts: 19

Website

Re: Questions on mdadm

I replied here http://bbs.archlinux.org/viewtopic.php?id=87425

You shouldn't post the same thing in multiple places.

hokasch

Member

Registered: 2007-09-23

Posts: 1,461

Re: Questions on mdadm

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Last edited by hokasch (2014-01-07 21:00:07)