RE: booting off a ZFS pool consisting of multiple striped mirror vdevs
> I don't know, but I plan to test that scenario in a few days. > > Matt Please share the results when you're done, I am really curious :) > It *should* work... I made changes a while back that allow for multiple > vdevs to attach to the root. In this case you should have 3 mirror > vdevs attached to the root, so as long as the BIOS can enumerate all of > the drives, we should find all of the vdevs and build the tree > correctly. It should be simple enough to test in qemu, except that the > BIOS in qemu is a little broken and might not id all of the drives. > > robert. If booting of a stripe of 3 mirrors should work assuming no BIOS bugs, can you explain why is booting off simple stripes (of any number of disks) currently unsupported? I haven't tested that myself, but everywhere I look seems to indicate that booting off a simple stripe doesn't work or is that "everywhere" also out of date after your changes? :) - Sincerely, Dan Naumov ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: booting off a ZFS pool consisting of multiple striped mirror vdevs
On Mon, 2010-02-15 at 10:07 -0800, Matt Reimer wrote: > On Sat, Feb 13, 2010 at 12:04 PM, Dan Naumov wrote: > > > Hello > > > > I have succesfully tested and used a "full ZFS install" of FreeBSD 8.0 > > on both single disk and mirror disk configurations using both MBR and > > GPT partitioning. AFAIK, with the more recent -CURRENT and -STABLE it > > is also possible to boot off a root filesystem located on raidz/raidz2 > > pools. But what about booting off pools consisting of multiple striped > > mirror or raidz vdevs? Like this: > > > > Assume each disk looks like a half of a traditional ZFS mirror root > > configuration using GPT > > > > 1: freebsd-boot > > 2: freebsd-swap > > 3: freebsd-zfs > > > > |disk1+disk2| + |disk3+disk4| + |disk5+disk6| > > > > My logic tells me that while booting off any of the 6 disks, boot0 and > > boot1 stage should obviously work fine, but what about the boot2 > > stage? Can it properly handle booting off a root filesystem thats > > striped across 3 mirror vdevs or is booting off a single mirror vdev > > the best that one can do right now? > > > > > I don't know, but I plan to test that scenario in a few days. It *should* work... I made changes a while back that allow for multiple vdevs to attach to the root. In this case you should have 3 mirror vdevs attached to the root, so as long as the BIOS can enumerate all of the drives, we should find all of the vdevs and build the tree correctly. It should be simple enough to test in qemu, except that the BIOS in qemu is a little broken and might not id all of the drives. robert. > Matt > ___ > freebsd-sta...@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org" -- Robert Noland FreeBSD ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: booting off a ZFS pool consisting of multiple striped mirror vdevs
On Sat, Feb 13, 2010 at 12:04 PM, Dan Naumov wrote: > Hello > > I have succesfully tested and used a "full ZFS install" of FreeBSD 8.0 > on both single disk and mirror disk configurations using both MBR and > GPT partitioning. AFAIK, with the more recent -CURRENT and -STABLE it > is also possible to boot off a root filesystem located on raidz/raidz2 > pools. But what about booting off pools consisting of multiple striped > mirror or raidz vdevs? Like this: > > Assume each disk looks like a half of a traditional ZFS mirror root > configuration using GPT > > 1: freebsd-boot > 2: freebsd-swap > 3: freebsd-zfs > > |disk1+disk2| + |disk3+disk4| + |disk5+disk6| > > My logic tells me that while booting off any of the 6 disks, boot0 and > boot1 stage should obviously work fine, but what about the boot2 > stage? Can it properly handle booting off a root filesystem thats > striped across 3 mirror vdevs or is booting off a single mirror vdev > the best that one can do right now? > > I don't know, but I plan to test that scenario in a few days. Matt ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
