Re: zfs on hardware raid array
> On Jan 19, 2019, at 2:31 PM, Brian Bilbrey wrote: > > (Bcc’d to the OP) > > You *could* do what I’ve done in the past - make each disk into a single disk > volume presented by the array, then use the presented volumes to make your > mirrors, z2s, etc… I’m not running that anymore, but it was fine and reliable > for years. A failed disk could be replaced in the array, then re-presented to > the OS for rebuild. I actually kept a presented volume back to use as a warm > spare in those circumstances. > > A reasonably inexpensive alternative is to replace the controller with one > that permits JBOD. [ BCC'd to the poster above ] We have some Oracle X5 servers that are also unable to configure the SAS disks as JBOD. We do the same thing, each disk is a separate volume, and we just use ZFS mirrors on the individual volumes. We thought it strange that Oracle would spec hardware (I think it's an LSI controller) that didn't allow JBOD when they themselves recommend not using hardware RAID for ZFS, and also don't support booting from anything other than ZFS (starting with Solaris 11). -- DE ___ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
Re: zfs on hardware raid array
(Bcc’d to the OP) You *could* do what I’ve done in the past - make each disk into a single disk volume presented by the array, then use the presented volumes to make your mirrors, z2s, etc… I’m not running that anymore, but it was fine and reliable for years. A failed disk could be replaced in the array, then re-presented to the OS for rebuild. I actually kept a presented volume back to use as a warm spare in those circumstances. A reasonably inexpensive alternative is to replace the controller with one that permits JBOD. Best, Brian > On Jan 19, 2019, at 10:07, Maciej Jan Broniarz wrote: > > Hi, > > I want to use ZFS on a hardware-raid array. I have no option of making it > JBOD. I know it is best to use ZFS on JBOD, but > that possible in that particular case. My question is - how bad of an idea is > it. I have read very different opinions on that subject, but none of them > seems conclusive. > > Any comments and especially case studies are most welcome. > All best, > mjb > ___ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org" ___ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
zfs on hardware raid array
Hi, I want to use ZFS on a hardware-raid array. I have no option of making it JBOD. I know it is best to use ZFS on JBOD, but that possible in that particular case. My question is - how bad of an idea is it. I have read very different opinions on that subject, but none of them seems conclusive. Any comments and especially case studies are most welcome. All best, mjb ___ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
Re: More CARP issues under 12
On Thu, Jan 17, 2019 at 4:21 AM Pete French wrote: > so, having got a workaround for yesterdays problems, I now went to upgrade > my > other pair of boxes using CARP. No 'pf' on these, just one shared address. > This is the setup I have tested in development and it works fine. > > I install the new kenel and do the first reboot - and I get the panic > below. Maybe its not carp related, but seems suspicious as the last > thing it spits out is a carp message. > > Note this is the first reboot - so 12.0 kernel with the 11 userland, in > perparation for the installworld step. Machine is booting from, ZFS and > also > has a GELI partition contain some data which requires a manual password. > To point out the obvious, booting a 12.0 kernel with 11 userland to multiuser mode is seriously unsupported. You really need to boot to single user and install 12.0 userland to really expect things to work. OTOH, while I would expect that MANY things might not work, panics should not come from problems in userland. Still, I would not be at all shocked if it turns out to be coincidental to CARP. I would also not be shocked if this makes no difference, but even between minor version updates, there can be issues when the kernel and userland are different versions. Is there a reason that a standalone boot is not possible? Both installworld and mergemaster should be run before moving to multiuser mode and reboot is preferred to exit. In some cases even delete-old can be required before safely going to multimode. -- Kevin Oberman, Part time kid herder and retired Network Engineer E-mail: rkober...@gmail.com PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683 ___ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
