[clue] Whack-a-disk

foo7775 at comcast.net foo7775 at comcast.net
Wed Jul 30 22:10:13 MDT 2014


NICE!!! *Very* cool topic, Dave!! (Even if it *does* have '*REALLY* bad idea for jr. admins!!!' written all over it...) ;-) 

T. 

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

From: "David L. Willson" <DLWillson at TheGeek.NU> 
To: "list, CLUE" <clue at cluedenver.org> 
Sent: Tuesday, July 29, 2014 12:51:28 PM 
Subject: [clue] Whack-a-disk 

How can I quickly and simply wipe and re-partition a disk from a script? 

Here's a proposal, using sdc as the example. 

# Quickly wipe the head of the disk. 
sudo dd if=/dev/zero of=/dev/sdc bs=16MB count=1 

# Create a new, basic partition table. Good for up to 2TB. 
sudo parted /dev/sdc mklabel msdos 

# If you have a disk larger than 2TB, use this instead. 
# sudo parted /dev/sdc mklabel gpt 

# Create a new, cylinder-aligned, primary partition, the full size of the disk 
sudo parted --align cylinder /dev/sdc mkpart primary 0% 100% 

The most interesting part might be that last line. I found many posts by people looking for a way to create a partition using parted non-interactively that is the full size of the disk and "properly aligned for best performance", but I didn't find anyone giving the answer. So... So that. 

-- 
David L. Willson 
Teacher, Engineer, Evangelist 
RHCE+Satellite CCAH Network+ A+ Linux+ LPIC-1 UbuntuCP NovellCLA 
Mobile 720-333-LANS(5267) 
http://sofree.us 

This is a good time for a r3VOLution. 
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