Bug#966575: Requested information about affected system (two disks, no raid)

[Christoph K.]

Hello,
my system (HP Z220 Workstation) was affected as well.
Steve asked for more information on the users mailing list, which I
try to provide here (it's my first use of the debian bug tracker).

1. Number of disks: 2


2. Filesystem setup

grub is installed in MBR of /dev/sda

# fdisk -l
Disk /dev/sda: 238,5 GiB, 256060514304 bytes, 500118192 sectors
Disk model: MTFDDAK256MAM-1K
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: 0xb0e478ed

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sda1  *         2048    206847    204800   100M  7 HPFS/NTFS/exFAT
/dev/sda2          206848 231323647 231116800 110,2G  7 HPFS/NTFS/exFAT
/dev/sda3       231323648 365541375 134217728    64G 83 Linux
/dev/sda4       365541376 500117503 134576128  64,2G  5 Extended
/dev/sda5       365543424 382320639  16777216     8G 82 Linux swap /
Solaris


Disk /dev/sdb: 1,8 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: WDC WD20EARX-00M
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x063dc1fc

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sdb1            2048 327682047 327680000 156,3G  7 HPFS/NTFS/exFAT
/dev/sdb2       327682048 361236479  33554432    16G 82 Linux swap /
Solaris


3. History of the system

As far as I remember (don't know how to check) I installed Jessie /
Debian 8 and upgraded to stretch, later to buster


4. Additional information

# uname -a
Linux xxxx-Debian 4.19.0-9-amd64 #1 SMP Debian
4.19.118-2+deb10u1 (2020-06-07) x86_64 GNU/Linux

I was able to fix the boot problem by using a rescue system from the
installer cd, mounting /dev/sda3 and then re-installed grub on /dev/sda
(via the rescue system interface menu).

This is a Linux / Windows dual boot setup.
/dev/sda is a SSD, /dev/sdb is a HDD

I don't know if this is relevant, but to be honest this computer has a
rather "adventurous" history. I copied the linux system from another
hard disk (maybe with UEFI) to this one. For some reason I don't
exactly remember I tried to switch the computer to UEFI, but it didn't
work out and I switched is back. That was around a year ago. Since
then everything with the bootloader worked fine ... until last
saturyday.