Re: Previously Bootable: Stretch using Grub with GPT, LUKS, & BTRFS
On Tue, 11 Sep 2018 at 17:22, Igor Cicimov wrote: > > > On Tue, 11 Sep 2018 11:45 am Joel Brunetti wrote: > >> Hey Team, >> >> I'm having trouble booting a previously bootable system. >> This system has been in use since very shortly before the Stretch release >> and has always been Stretch. >> I'm using Grub to boot a fully encrypted system. Each drive is >> partitioned with GPT and encrypted using LUKS. The drives are then used >> together with BTRFS. >> >> This system has worked with some minor boot problems (Which I thought >> were fixed by adding the bios_grub flag to my partition and the pmbr_boot >> flag to my disk) for at least a year. >> Today I can not boot the system. I suspect I've made it worse for trying >> to repair it so I will jump to where I am now. >> >> When I boot I get on either device: >> error: no such device: (UUID of my decrypted luks volume / btrfs pool) >> error: unknown filesystem >> > > Maybe check that the uuid hasn't changed somehow if mounting by uuid in > /etc/fstab > The uuid in my fstab is correct. Unfortunately at boot it is not present because grub fails to open the luks devices. I managed to get my system to work by sending my btrfs sub volume to another drive that was partitioned with MBR. There was no change to the filesystem. I chrooted in and installed grub and with a few other minor changes to mount points my system is working again. I have a poor understanding of GPT but I think GPT with grub and luks encryption is a little unstable. Thanks for the help. > > >> I've chrooted onto the system using a usb key. >> I can open my encrypted drives and mount the btrfs filesystem. >> I suspected a bad kernel or grub update so I: >> update initramfs -u -k all >> update-grub >> grub-install /dev/sda >> grub-install /dev/sdb >> >> This gives the above errors when I boot. >> >> When I inspected /boot/grub/grub.cfg I noted it is missing "insmod >> cryptodisk" and other encryption related modules. This is despite >> /etc/default/grub containing "GRUB_ENABLE_CRYPTODISK=y". I tried restoring >> /boot/grub/grub.cfg from a snapshot that does include those modules and >> then grub-install to both drives again but to no avail. >> >> I'm really at a loss and could really use some help in restoring my >> system. >> >> Thanks, >> Joel >> >> >> >>
Re: Previously Bootable: Stretch using Grub with GPT, LUKS, & BTRFS
On Tue, 11 Sep 2018 11:45 am Joel Brunetti wrote: > Hey Team, > > I'm having trouble booting a previously bootable system. > This system has been in use since very shortly before the Stretch release > and has always been Stretch. > I'm using Grub to boot a fully encrypted system. Each drive is partitioned > with GPT and encrypted using LUKS. The drives are then used together with > BTRFS. > > This system has worked with some minor boot problems (Which I thought were > fixed by adding the bios_grub flag to my partition and the pmbr_boot flag > to my disk) for at least a year. > Today I can not boot the system. I suspect I've made it worse for trying > to repair it so I will jump to where I am now. > > When I boot I get on either device: > error: no such device: (UUID of my decrypted luks volume / btrfs pool) > error: unknown filesystem > Maybe check that the uuid hasn't changed somehow if mounting by uuid in /etc/fstab > I've chrooted onto the system using a usb key. > I can open my encrypted drives and mount the btrfs filesystem. > I suspected a bad kernel or grub update so I: > update initramfs -u -k all > update-grub > grub-install /dev/sda > grub-install /dev/sdb > > This gives the above errors when I boot. > > When I inspected /boot/grub/grub.cfg I noted it is missing "insmod > cryptodisk" and other encryption related modules. This is despite > /etc/default/grub containing "GRUB_ENABLE_CRYPTODISK=y". I tried restoring > /boot/grub/grub.cfg from a snapshot that does include those modules and > then grub-install to both drives again but to no avail. > > I'm really at a loss and could really use some help in restoring my system. > > Thanks, > Joel > > > >
Re: Previously Bootable: Stretch using Grub with GPT, LUKS, & BTRFS
On Tue, Sep 11, 2018 at 3:28 AM, Joel Brunetti wrote: > I'm having trouble booting a previously bootable system. > This system has been in use since very shortly before the Stretch release > and has always been Stretch. > I'm using Grub to boot a fully encrypted system. Each drive is partitioned > with GPT and encrypted using LUKS. The drives are then used together with > BTRFS. > [...] > When I boot I get on either device: > error: no such device: (UUID of my decrypted luks volume / btrfs pool) > error: unknown filesystem I understand that you unlock using grub, do you ever get a passphrase prompt before those messages? (I have a somewhat similar setup but I unlock from initramfs and have an unencrypted /boot so I doubt my experiences are relevant)
