--- On Fri, 2/8/13, Gary Driggs <[email protected]> wrote:
> From: Gary Driggs <[email protected]> > Subject: Re: [discuss] The cylinder model & 4k sectors > To: "[email protected]" <[email protected]> > Date: Friday, February 8, 2013, 8:56 AM > On Feb 8, 2013, at 6:08 AM, Reginald > Beardsley wrote: > > > replacing a disk in a RAIDZ array w/o having to obtain > an identical unit and w/o having to leave buffers of unused > space between slices. > > Several benefits of ZFS include the fact that you don't need > to use > identical drives or slice them up to include a meta data > partition a > la Solaris Volume Manager. Your proposal sounds interesting > but I'm > curious why you'd spend so much time adjusting code when it > doesn't > sound necessary based on this snippet of config data you've > shared. > For that matter, 4k sector drives have been out awhile & > discussed on > the dev lists for so long that I would be surprised if the > devs have > just ignored their existence in hopes that they'll go away > some day. > :) > The motivation for my interest was the ordeal of constructing a bootable 3 disk RAIDZ array using the oi_151a7 LiveDVD GUI installer. That is probably going to get torn down and a 4th disk added so I can run /export on RAIDZ2 and be able to take a 2 disk failure on a 4 disk system w/o loss of data. The crux of the matter is if you're going to use a mirrored rpool in s0 to boot and RAIDZ in s1, you had better be able to get the slices dimensioned so that the new disk s0 >= old s0 AND new s1 >= old s1. It is not at all clear that can be done reliably today even if new disk >= old disk because of the issues I'm proposing to address. You can find more about what I've done at: http://wiki.openindiana.org/oi/Building+a+small+NAS+using+OI I plan to rewrite it as a general "How to Boot RAIDZ" tutorial. I didn't realize what I was getting into when I started. Have Fun! Reg ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
