Re: [zfs-discuss] Raid-Z with N^2+1 disks

2008-07-19 Thread Rob Clark
> On July 14, 2008 7:49:58 PM -0500 Bob Friesenhahn > <[EMAIL PROTECTED]> wrote: > > With ZFS and modern CPUs, the parity calculation is > surely in the noise to the point of being unmeasurable. > > I would agree with that. The parity calculation has *never* been a > factor in and of itself. T

Re: [zfs-discuss] ? SX:CE snv_91 - ZFS - raid and mirror - drive

2008-07-19 Thread Rob Clark
> On Sun, Jul 6, 2008 at 3:46 PM, Ross [EMAIL PROTECTED] wrote: > For your second one I'm less sure what's going on: > ... . The problem is that a two disk raid-z makes no sense. > Traditionally this level of raid needs a minimum of three disks to work. > I suspect ZFS may be interpreting raid-z a

Re: [zfs-discuss] install opensolaris on raidz

2008-07-19 Thread Ross
Err... I think you guys are talking cross purposes here. Either I'm missing the point completely, or are you not aware that the Thumper2 includes a flash storage slot so the OS doesn't use any of the 48 disks any more? No, it's not mirrored, but Richard was trying to point out that it's likely