RE: Array Size

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Overhead!
If filesystem is ext3:
	Reserved for root user, default 5%
	Inodes
	Journal
	Superblocks

I don't know the exact numbers.

Why RAID0?  You lose a disk and game over!

-----Original Message-----
From: linux-raid-owner@vger.kernel.org
[mailto:linux-raid-owner@vger.kernel.org] On Behalf Of Sharif Islam
Sent: Sunday, January 11, 2004 10:49 PM
To: linux-raid@vger.kernel.org
Subject: Array Size

I have 6 IDE hard drives, each 120 GB.
I am bit confused by the reported array size.

# mdadm -D /dev/md0
/dev/md0:
        Version : 00.90.00
  Creation Time : Fri Jan  9 13:52:20 2004
     Raid Level : linear
     Array Size : 703324416 (670.74 GiB 720.25 GB)

[....]

# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/hda1              26G  1.2G   23G   5% /
/dev/hda5             2.6G   33M  2.4G   2% /tmp
/dev/hda3             3.9G   59M  3.6G   2% /var
/dev/md0              661G   33M  627G   1% /ppa


Shouldn't the above be ~720GB?

Thanks.

-Sharif


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