Date: Fri, 15 Jan 2016 15:00:51 +0000 From: krad <kraduk@gmail.com> To: Steven Hartland <killing@multiplay.co.uk> Cc: Eric McCorkle <eric@metricspace.net>, Renato Botelho <garga@freebsd.org>, freebsd-hackers@freebsd.org, Gabor Radnai <gabor.radnai@gmail.com> Subject: Re: EFI/ZFS Update: successful tests, need more complex vdevs Message-ID: <CALfReyenHEfJ8Bi-qRGovg1ZuQ=XC%2B9Tn0dnEaiO7pZo%2BMwJjg@mail.gmail.com> In-Reply-To: <569906A1.8040700@multiplay.co.uk> References: <CABnVG=dbUQF_9-0FGj6hjNKPoRP-YekZfCEYfEb5DgcWK30BCA@mail.gmail.com> <9418E44F-114E-4ABA-A32D-416297BCDA9F@metricspace.net> <56985C6A.6040209@multiplay.co.uk> <EB1FB298-78BA-43C5-B5CF-C615D3D93570@FreeBSD.org> <569900CD.2040003@metricspace.net> <CALfReye5nEMVvtoFKgL%2BweN4m5o%2BcERPmJibuJayNEtmLGaG3Q@mail.gmail.com> <569906A1.8040700@multiplay.co.uk>
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It get even more awesome 8) On 15 January 2016 at 14:48, Steven Hartland <killing@multiplay.co.uk> wrote: > ZFS Boot Environments (BE) support was also wired up to Beastie last night > by Allan for those interested in that :) > > > On 15/01/2016 14:42, krad wrote: > > Thanks this is useful information. I did have a look at the way pc bsd was > using grub to boot rootonzfs systems, and they used the Kfreebsd options. > This looked kind of handy as you might have been able to specify the zfs > file system to boot off. This would be a real boost the boot environments > as you could easily choose which one to boot into, making upgrade recovery > far easier. > > Presumably the freebsd@ part in your setup refers to the zfs file system? > In which case you could have multiple menu entries with different file > systems specified, this is assuming the grub config is on the efi disk > though? > > I'm also curious how this would his work when the are multiple pools on > the same disk for some reason. > > > > On 15 January 2016 at 14:23, Eric McCorkle <eric@metricspace.net> wrote: > >> On 01/15/16 06:51, Renato Botelho wrote: >> >>> On Jan 15, 2016, at 00:41, Steven Hartland < <killing@multiplay.co.uk> >>>> killing@multiplay.co.uk> wrote: >>>> >>>> Just wanted to let everyone know that I just finished committing these >>>> changes to the tree. >>>> >>>> Huge thanks to Eric's for his work on this, as well as everyone else >>>> who contributed. >>>> >>>> I've set the target for MFC of 2 weeks, so I hope to be able to get >>>> this into stable/10 before the 10.3 slush, so if you're interested in this >>>> change please test a head build > r294068 ASAP. >>>> >>> >>> Great work, thanks! >>> >>> Is there a way to move a installed ZFS system to EFI? >>> >>> >> (Refer to Steven's guide for the simple case where you can create an EFI >> partition) >> >> >> == Using GRUB == >> >> GRUB can be used with loader.efi on a ZFS system (I use this myself, as I >> have a Gentoo install in the same ZFS volume) >> >> Make sure you install GRUB with EFI support (the ports collection will >> handle this). The grub port comes with a script that auto-detects >> filesystems and sets up a grub.cfg in /boot/grub/. However, that script >> won't properly detect ZFS partitions, so you'll need to add it manually. >> The entry is simple. >> >> I have a zfs volume called "data", which has the freebsd system root on >> the filesystem data/freebsd. The GRUB entry then is: >> >> menuentry "FreeBSD" { >> search.fs_label data ZFS_PART >> chainloader ($ZFS_PART)/freebsd@/boot/loader.efi >> } >> >> The first line searches for the volume "data" and binds its device to the >> variable ZFS_PART. The second specifies that the chained bootloader is >> under the filesystem "freebsd" (the @ at the end of the name denotes a >> filesystem, not a path), with the path /boot/loader.efi >> >> >> == Disks without enough space to make the GPT or EFI partition == >> >> If you have a ZFS filesystem on an MBR disk, or on a GPT disk without >> enough space to create a workable EFI partition, you can use one of ZFS's >> lesser-known features: zfs send/recv. >> >> ZFS send and recv allow an entire filesystem to be serialized out to a >> stream, and then read back in. You can use this to dump the entire >> filesystem out to a removable storage or an NFS mount. Then, use an >> install disk or memstick and repartition your drive, using zfs recv to >> recreate the filesystem. >> >> >> == On a Mac == >> >> (Note: this is based on research that is several years old at this >> point. Also, I never actually field tested this myself.) >> >> Macs are wierd, due to their non-standard EFI. The Mac EFI >> implementation looks for an HFS+ partition, and loads the "blessed" file as >> the EFI bootloader (this is a special filesystem-level metadata unique to >> HFS+ filesystems). >> >> In order to do an EFI boot on a mac, you'd need some way of manufacturing >> an HFS+ partition containing only your bootloader, with that file being >> "blessed". The easiest way to do this would be to use a Mac OS install to >> create an empty HFS+ filesystem, add your boot loader, then use a shell >> command to "bless" it (this command exists, but I don't remember what it is >> offhand). It also wouldn't be too hard to write a tool to create an HFS+ >> image from a file (I have a half-written implementation of that lying >> around somewhere). >> >> Also note that Macs expect a 200MB EFI partition (which isn't actually >> used for anything), and I've heard reports of the firmware flaking out if >> it's not there. >> >> I believe there are also GRUB and rEFIt options for Mac, if you don't >> want to go to these lengths. >> >> _______________________________________________ >> freebsd-hackers@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> To unsubscribe, send any mail to " >> <freebsd-hackers-unsubscribe@freebsd.org> >> freebsd-hackers-unsubscribe@freebsd.org" >> > > >
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