On 2017-09-02 10:52, Ruben wrote: > Hi Jason, > > >> Make sure >> you adjust the zvol block size in the default config before creating your >> guest or you will wonder where your storage starts to disappear to. >> >> Cheers, >> >> Jason > Perhaps slightly off-topic, but might you have any recommendations > regarding those blocksizes? > > I'm not really that well versed in blocksizes / filesystems and am often > wondering where my 5TB zvol (bhyves into an ext4 volume for an ubuntu > guest) exactly disappears into :P > > Regards, > > Ruben >> On 2 Sep 2017 2:46 p.m., "Dylan Williams" <free...@host852.com> wrote: >> >> Dear all, >> >> Is there a limit with respect to the size of the virtual drive I can create >> for a VM using bhyve? Presumably not but I’m running into problems with a >> larger drive. >> >> I am trying to create a 4T Ubuntu machine on a FreeBSD11.1 server using >> iohyve. There’s plenty of drive space available so it’s not a drive space >> issue. I am able to create a 40G machine without any problems but exactly >> the same commands to create a 4000G machine results in a server that won’t >> boot past Grub. Is this an iohyve issue perhaps? >> >> Commands used that results in a working Ubuntu server: >> >> iohyve create ubu 40G >> iohyve set ubu loader=grub-bhyve os=debian ram=40G cpu=10 >> iohyve install ubu ubuntu-16.04.3-server-amd64.iso < >> ftp://ftp.cuhk.edu.hk/pub/Linux/ubuntu-releases/16.04.3/ >> ubuntu-16.04.3-server-amd64.iso> >> >> Commands used that results in a broken Ubuntu server: >> >> iohyve create ubu 4000G >> iohyve set ubu loader=grub-bhyve os=debian ram=40G cpu=10 >> iohyve install ubu ubuntu-16.04.3-server-amd64.iso < >> ftp://ftp.cuhk.edu.hk/pub/Linux/ubuntu-releases/16.04.3/ >> ubuntu-16.04.3-server-amd64.iso> >> >> The screen I get in the console when I boot (iohyve start ubu) the 4T >> machine is: >> >> GNU GRUB version 2.00 >> >> Minimal BASH-like line editing is supported. For the first word, TAB >> lists possible command completions. Anywhere else TAB lists possible >> device or file completions. >> >> >> grub> >> >> Does anyone have any ideas? I’ve been at this for hours trying different >> configurations. LVM is not selected when installing either of the above >> machines as that seems to cause more problems. >> >> Many thanks, >> Dylan. >> _______________________________________________ >> freebsd-virtualization@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization >> To unsubscribe, send any mail to "freebsd-virtualization- >> unsubscr...@freebsd.org" >> _______________________________________________ >> freebsd-virtualization@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization >> To unsubscribe, send any mail to >> "freebsd-virtualization-unsubscr...@freebsd.org" > _______________________________________________ > freebsd-virtualization@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization > To unsubscribe, send any mail to > "freebsd-virtualization-unsubscr...@freebsd.org" >
To understand why space in a ZVOL goes missing, research 'raidz padding'. See here: https://www.delphix.com/blog/delphix-engineering/zfs-raidz-stripe-width-or-how-i-learned-stop-worrying-and-love-raidz For more detail, see Chapter 9 of "FreeBSD Mastery: Advanced ZFS" from http://www.zfsbook.com -- Allan Jude
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