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From Jeffrey Buell <jbu...@vmware.com>
Subject Re: Format the harddrive
Date Mon, 25 Feb 2013 22:40:58 GMT
What make and model are these machines? What is the storage controller? You may need to go
into the storage configuration tool during hardware boot and look at how the controller has
configured the disks. Maybe they need to be activated. Or delete all the "virtual disks" and
start over. On HP machines you can use the command-line tool "hpacucli" to do this. Other
vendors probably have similar tools. 

----- Original Message -----

From: "Rahul1 Shah" <rahul1.shah@intel.com> 
To: user@hadoop.apache.org 
Sent: Monday, February 25, 2013 2:27:39 PM 
Subject: RE: Format the harddrive 

I used gparted and wiped of every partition disks had. But as soon as I put the OS back it
gives me the warning “Disks sdc, sde, sdf, sdi, sdk contain BIOS RAID metadata but are not
part of any recognized BIOS RAID sets/ Ignoring disks sdc, sde, sdf, sdi, sdk. It shows me
the RAID strips to load OS into and I cant remove them after I load OS since it contains the

Right now trying the dd command over the entire disk to wipe of any data. Hope it works. If
you have any better solution pls let me know. Thanks 

From: Michael Namaiandeh [mailto:mnamaiandeh@healthcit.com] 
Sent: Monday, February 25, 2013 3:11 PM 
To: user@hadoop.apache.org 
Subject: RE: Format the harddrive 

Are your partitions LVM or something else? If it’s not LVM then you can use GParted to re-configure
your LV configuration. 

From: Jeffrey Buell [ mailto:jbuell@vmware.com ] 
Sent: Monday, February 25, 2013 4:10 PM 
To: user@hadoop.apache.org 
Subject: Re: Format the harddrive 

I've installed RHEL 6.1 with none of these problems. Not sure why you can't delete the logical
volumes, but I suggest not letting the installer do automatic disk configuration. Then you
can manually select which disks you want for the root partitions, their sizes, and how you
want them formatted. Configure other disks for Hadoop data later, after OS install. 


From: "Rahul1 Shah" < rahul1.shah@intel.com > 
To: user@hadoop.apache.org 
Sent: Monday, February 25, 2013 12:33:17 PM 
Subject: Format the harddrive 

I am installing Hadoop on some systems. For this I want to format the hard drive for any previous
RAID format or any kind of data. I am facing this problem that when I install Redhat 6.2 on
these systems it creates a logical volume on the disk and does not let me create ext4 partitions
on them. Any idea how do I format all the disk. 


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