I did a 12x180G and as I recall was unable to do 13x180G as it overflowed during mke2fs. This was a year ago though so I don't know
if that's been improved since then.
I've got 13 of these with one drive marked as a spare:
Disk /dev/sda: 255 heads, 63 sectors, 22072 cylinders
Units = cylinders of 16065 * 512 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 22072 177293308+ fd Linux raid autodetect
Number Major Minor RaidDevice State
0 8 177 0 active sync /dev/sdl1
1 8 17 1 active sync /dev/sdb1
2 8 33 2 active sync /dev/sdc1
3 8 1 3 active sync /dev/sda1
4 8 49 4 active sync /dev/sdd1
5 8 65 5 active sync /dev/sde1
6 8 81 6 active sync /dev/sdf1
7 8 97 7 active sync /dev/sdg1
8 8 113 8 active sync /dev/sdh1
9 8 129 9 active sync /dev/sdi1
10 8 145 10 active sync /dev/sdj1
11 8 161 11 active sync /dev/sdk1
12 65 49 12 /dev/sdt1
----- Original Message -----
From: "Stephan van Hienen" <raid@a2000.nu>
To: "Peter Chubb" <peter@chubb.wattle.id.au>
Cc: <linux-kernel@vger.kernel.org>; <linux-raid@vger.kernel.org>; <bernard@biesterbos.nl>; <ext2-devel@lists.sourceforge.net>
Sent: Wednesday, February 12, 2003 5:39 AM
Subject: Re: raid5 2TB+ NO GO ?
> On Wed, 12 Feb 2003, Peter Chubb wrote:
>
> > >>>>> "Stephan" == Stephan van Hienen <raid@a2000.nu> writes:
> >
> > Stephan,
> > Just noticed you're using raid5 --- I don't believe that level
> > 5 will work, as its data structures and internal algorithms are
> > 32-bit only. I've done no work on it to make it work (I've been
> > waiting for the rewrite in 2.5), and don't have time to do anything now.
> >
> > You could try making sector in the struct stripe_head a sector_t, but
> > I'm pretty sure you'll run into other problems.
> >
> > I only managed to get raid 0 and linear to work when I was testing.
>
> ok clear, so no raid5 for 2TB+ then :(
>
> looks like i have to remove some hd's then
>
> what will be the limit ?
>
> 13*180GB in raid5 ?
> or 12*180GB in raid5 ?
>
> Device Size : 175823296 (167.68 GiB 180.09 GB)
>
> 13* will give me 1,97TiB but will there be an internal raid5 problem ?
> (since it will be 13*180GB to be adressed)
>
>
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