17
Boot into NVMe drives from USB
(lemmy.ml)
Hi all, I've installed Debian in 2 (mdadm RAID 1 formtted with Btrfs) NVMe drives installed into 2 PCIe adapters. The motherboard doesn't support booting from those drives, so I've installed Debian into a USB stick (and it works) and I wanted to add into grub the RAID NVMe drives.
os-prober doesn't see the other Debian installation.
fdisk -l shows the 2 nvme drives, but it doesn't see md0:
Disk /dev/nvme0n1: 238.47 GiB, 256060514304 bytes, 500118192 sectors
Disk model: SAMSUNG MZVLQ256HBJD-00BH1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 16384 bytes / 131072 bytes
Disklabel type: dos
Disk identifier: 0xab581c58
Device Boot Start End Sectors Size Id Type
/dev/nvme0n1p1 2048 500118191 500116144 238.5G fd Linux raid autodetect
Disk /dev/nvme1n1: 238.47 GiB, 256060514304 bytes, 500118192 sectors
Disk model: SAMSUNG MZVLQ256HBJD-00BH1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 16384 bytes / 131072 bytes
Disklabel type: dos
Disk identifier: 0x863fc92a
Device Boot Start End Sectors Size Id Type
/dev/nvme1n1p1 2048 500118191 500116144 238.5G fd Linux raid autodetect
Disk /dev/sda: 14.32 GiB, 15376000000 bytes, 30031250 sectors
Disk model: Ultra Fit
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x1d46a293
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 28028927 28026880 13.4G 83 Linux
/dev/sda2 28030974 30029823 1998850 976M 5 Extended
/dev/sda5 28030976 30029823 1998848 976M 82 Linux swap / Solaris
mdadm --detail --scan doesn't output anything. How do I solve this problem?
I do this, except with Ubuntu and a btrfs volume for root.
My motherboard supports UEFI, so it doesn't care where the EFI partition is. It's on a USB stick.
The way I did it was by installing to a SATA SSD and then moving the EFI partition to the usb stick and then substituting the SATA SSD with the NVMe SSD using btrfs.
I think I also needed to use reEFInd temporarily to give me an UEFI shell to do some debugging.
Oh! I also setup systemd-boot so I could trivially boot the kernel directly from UEFI, stored on the EFI partition and avoided grub altogether.