The last disk is not excluded, since the excluded space is used for parity (xor).
An equal part of all disks is excluded (the parity data). However, the size is the same as 1 disk being excluded. :) > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:linux-raid- > [EMAIL PROTECTED] On Behalf Of Mark Overmeer > Sent: Tuesday, December 13, 2005 12:10 PM > To: Ming Zhang > Cc: Sharif Islam; [email protected] > Subject: Re: array size > > * Ming Zhang ([EMAIL PROTECTED]) [051213 16:15]: > > 4 disks, 0 spare, so 3x capacity > > 586075008 = 3 x 195358336 > > > > On Tue, 2005-12-13 at 10:01 -0600, Sharif Islam wrote: > > > Shouldn't the size of the array be around 760GB? It says spare device > 0. > > > > /dev/md0: > > > Version : 00.90.01 > > > Creation Time : Mon Dec 12 15:56:58 2005 > > > Raid Level : raid5 > > > Array Size : 586075008 (558.92 GiB 600.14 GB) > > > Device Size : 195358336 (186.31 GiB 200.05 GB) > > The description of the field is a little confusing. It should read > "Netto Array Size" or "Available Disk Space" or some. Then it is clear > that the last disk is excluded from the shown size. > -- > Regards, > > MarkOv > > ------------------------------------------------------------------------ > Mark Overmeer MSc MARKOV Solutions > [EMAIL PROTECTED] [EMAIL PROTECTED] > http://Mark.Overmeer.net http://solutions.overmeer.net > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
