On Monday, September 7, 2015 at 3:40:05 AM UTC-5, Pascal Hambourg wrote: > ray a écrit : > > > > AMD64 32G RAM > > sda, sdb 32GB + 32GB, RAID0 - md0, LVM, GParted shows 1MB reserved, 1 GB > > (EFI) > > sdc, sdd 64GB + 64GB, RAID0- md1, md127, LVM, GParted shows 1MB reserved, 1 > > GB (EFI) > > sde, sdf 120GB + 120GB, RAID0- md0, md126 LVM, GParted shows 1MB reserved, > > 1 GB (EFI) > ^^^^^ > I guess you mean md2 ? Yes, you are correct, md2. > > > sdg, sdh are 2 and 4 GB HD, sdg currently hosts debian8.+q++q > ^^^^ > I guess you mean TB ? Hard to find 4 GB hard disks these days. Yes, you are correct, TB. > > > md0-2 form a vg for the new debian8 as dom0 for a xen instance, md127 > > is a vg, md126 is a vg. md127 & 126 are for swap files. > > Why use separate VGs for swaps ? Performance issues ? Yes, I chose VGs on two different RAID0 to minimize risk of swap bottle necks, and moved them off of the installation RAID0 volume. I don't know that it will be a problem on this machine but it was easy to architect a mitigation and I have had this problem on all my other workstations. > > > gdisk reports that the sda and sdb have gpt partitions. > > You also report that they contain an EFI system partition. This is > required for booting a disk in UEFI mode (as opposed to legacy BIOS > mode, which benefits from a BIOS boot partition instead). If the system > boots in BIOS/legacy mode instead of native UEFI mode, you should > convert the EFI system partition into a BIOS boot partition or create a > BIOS boot partition in the 1 MB reserved space. > > Did the Debian installer boot in EFI or BIOS/legacy mode ? > You can see it in different ways. > > In BIOS mode : > - it displays the usual well known boot screen from ISOLinux > - assisted mode using the whole GPT disk creates a BIOS boot partition > - the "BIOS boot" partition type is available in manual mode on GPT disks > - in expert mode, GRUB (grub-pc) and LILO are available as the > bootloader and the installer prompts for the boot device > > In UEFI mode : > - it displays a different boot screen from GRUB > - assisted mode using the whole disk creates an EFI system partition > mounted on /boot/efi > - the "EFI system" partition type is available in manual mode > - even in expert mode, only GRUB (grub-efi) is available as the > bootloader and the installer does not prompts for the boot device. The motherboard BIOS reports the Debian installation media as a UEFI USB. The installer boot screen says UEFI and it is the same media used on the harddisk. > > What is the boot mode of the already installed system ? UEFI. > > > I have attempted again to install a new debian8 on the LVM on RAID0 > > for sda&b. I learned more about using the installer for portioning so I > > was able to get /boot on a RAID0 partition (outside of the vg). > > If the installer booted in BIOS mode, what did you select as the boot > device during GRUB installation ? It installed in UEFI mode. > > > On rebooting, nothing would boot. The screen message said to insert > > the media to boot from. > > So the firmware does not see a boot disk. Did you remove the harddisks > containing the existing Debian installation ? The harddisks have not been changed. This is my second round. Before I set up the RAID, I had a Debian instance on the HD that worked fine and when I installed a new instance on the SSD, neither would boot.
So I rebuilt the HD instance, ran it to configure the SSDs, and again, when installing to the SSDs, nothing will boot.
