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Old 03-09-2015, 11:58 PM   #1
wtdedula
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Question about RAID disk


Hello All;
I was able to create a RAID array mode 1 using two 4TB drives but the resulting array (md0) is listed as "4.0 TB Unknown" in the Disks gui.

I am wondering if this is correct to leave it as-is or if I have to set this to a partition type (ext4?)for it to work properly?

Thanks.

Tim
 
Old 03-10-2015, 04:20 AM   #2
T3RM1NVT0R
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As you said you have created the RAID but to use it you have to create filesystem. I mean you have configured RAID but it is still raw disk without any format.
 
Old 03-10-2015, 06:42 AM   #3
wtdedula
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Thanks. The reason I was questioning is because I formatted both disks to ext4 BEFORE creating the RAID but the resulting md0 disk was not formatted.

Tim
 
Old 03-10-2015, 12:36 PM   #4
maples
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I hope you didn't have anything saved in those ext4 partitions before you made the RAID, because it probably isn't there now.

The RAID will format the disks in some format (I don't know, but it's only readable as a RAID.). You have to format the RAID itself (usually /dev/mdX). You can use Gparted or any other partitioning tool.
 
Old 03-10-2015, 03:46 PM   #5
wtdedula
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Thanks for responding, maples;
No I didn't have anything on those ext4 partitions when I created the RAID. This is a new media server I'm building.

Thanks - OK I'll format to ext4 using Parted (or GParted).

Tim
 
Old 03-10-2015, 06:54 PM   #6
jefro
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Be sure you get the raid array and not a single disk. Also partition it.
http://ewams.net/?view=Formatting_a_...lume_with_ext4 has some tips.

Gparted ought to show you the array.
 
Old 03-10-2015, 10:20 PM   #7
Fred Caro
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The previous link gives some good tips but note that the kernel is 2.6... and it makes a difference which version of mdadm you use and where you put the /boot directory. Also bare in mind that hdd's of the same make/type/age are likely to fail at a similar time.

Fred.
 
  


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