[SunHELP] veritas volume manager

[Fletcher, Joe]

Take one disk out for parity info. For RAID5 you need minimum 3 disks. For
disks of a given size to get (N x size) worth of storage you require N+1
disks. In your case it sounds like someting else has gone wrong. For Raid5
using 6 x36GB disks I'd expect the max vol size to be 180Gb. Based on the
size of your volume it sounds like you've got your disks in 3 mirror pairs
which in turn have been RAID5'd. Either that or you only have 3 disks in
your RAID5 volume.  


-----Original Message-----
From: Tim Longo [mailto:tlongo at avaya.com]
Sent: 19 July 2001 12:47
To: sunhelp at sunhelp.org
Subject: [SunHELP] veritas volume manager



I currently have 6x36gb disks in a D1000 array hooked up to a 220R.  I'd
like to configure these disks using Veritas volume manager in a raid5
configuration.  It seems that when I do so, the amount of available space is
much smaller than I would expect.  Since I have 6 disks, 6x36g=216gb max.
When I create a disk group, and make a raid5 volume, the maximum available
space I can use in my volume is 69gb.  Can anyone explain that to me?  Am I
doing something wrong?

Thanks.

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