Comments on: Software RAID 5 in Ubuntu with mdadm

By: Paul

Paul — Sat, 13 Feb 2010 15:48:53 +0000

Wow, somehow I always miss one tiny detail like this. Thanks Chris, everything’s working great now!

By: Chris Harcourt

Chris Harcourt — Wed, 10 Feb 2010 15:03:09 +0000

@Paul – The command you want is: “watch cat /proc/mdstat”

Note the space between “cat” and “/proc/mdstat”.

Hope that helps…

By: Paul

Paul — Sun, 07 Feb 2010 00:08:08 +0000

Thanks for the tutorial! I’ve got everything working fine in Xubuntu, but when I do a “watch cat/proc/mdtats” it tells me “sh: cat/proc/mdstat: not found”
Did I miss something?

By: Sam

Sam — Tue, 10 Nov 2009 10:53:10 +0000

In ubuntu 9.10 when i would reboot the raid wasn’t being mounted, and if i ran ’sudo mount -a’ i got the error ‘mount: /dev/md0 is already mounted or /var/media is busy’

To fix it change the /etc/fstab file entry
From: /dev/md0 /var/media auto defaults 0 3
To: /dev/md0 /var/media ext3 defaults 0 0

and it worked fine

By: JamieRF » Software RAID-5: using mdadm in Ubuntu 9.10

JamieRF » Software RAID-5: using mdadm in Ubuntu 9.10 — Wed, 04 Nov 2009 19:54:40 +0000

[...] Software RAID 5 in Ubuntu with mdadm [...]

By: Software RAID Commands « Never Use This Font

Software RAID Commands « Never Use This Font — Mon, 31 Aug 2009 17:51:42 +0000

[...] http://bfish.xaedalus.net/2006/11/software-raid-5-in-ubuntu-with-mdadm/ [...]

By: Paul

Paul — Sat, 01 Aug 2009 12:12:50 +0000

Hello, This is a great play by play and will use it on all of my corporate server installs.

I have several machines that I am building. Each machine will have 3-1tb drives.
So does this mean that I should prepare a drive with an Ubuntu install (say a 160gb drive) build the raid5 config., then move my Ubunutu install from the 160gb to the Raid5 array?

I see that all the drives that will be added to the raid 5 arrary will be formatted, so I can not put the operating system on any of those. Maybe I should purchase an installation drive for each machine as the primary drive with the installation on it.

Or can I just install a new instance of Ubuntu onto the Raid5 array after it has been built.
Meaning can I move the 160gb drive off of the machine then create a new build from there?

I want to use the 160gb drive to setup all of my server’s.
Any help would be appreciated.

Reason is I need consistancy from machine to machine.
Thanks again for the great info..

ZJPS

By: primoz.tech.blog

primoz.tech.blog — Tue, 28 Jul 2009 20:30:59 +0000

Moved from Vista to Ubuntu…

Moved from Vista to Ubuntu…

By: Chris Harcourt

Chris Harcourt — Wed, 22 Jul 2009 15:39:22 +0000

@clifford / Marvin:
Sounds like the directory you’re trying to use as a mountpoint doesn’t exist. Try:
sudo mkdir /var/media

By: clifford

clifford — Tue, 21 Jul 2009 23:59:13 +0000

Same question as Marvin. “I got up to the part where you add /dev/md0 /var/media auto defaults 0 3 in the /etc/fstab file. As soon as I mount /dev/md0 it gave me an error “mount: moint point /var/media does not exist” What am I missing?”