Bug#966575: Requested information about affected system (four disks, raid1, crypt)

[Devin T. Theriot-Orr]

Hi all,

I just recovered my system (supermicro server) from this and thought I
would share in case it is helpful.

1. Number of disks: 4

2. Filesystem setup

This is a raid1 setup with crypted lvm.

Grub is installed in MBR of /dev/sda

# fdisk -l

Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Disk model: Samsung SSD 850
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: 0x953049db

Device     Boot    Start       End   Sectors   Size Id Type
/dev/sda1  *        2048    585727    583680   285M fd Linux raid autodetect
/dev/sda2         585728  39647231  39061504  18.6G fd Linux raid autodetect
/dev/sda3       39647232 918552575 878905344 419.1G fd Linux raid autodetect

Disk /dev/sdc: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: WDC WD10JPLX-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: 0x38784402

Device     Boot Start        End    Sectors   Size Id Type
/dev/sdc1        2048 1953525167 1953523120 931.5G 83 Linux

Disk /dev/sdd: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: WDC WD10JPLX-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: 0xa1da09f8

Device     Boot Start        End    Sectors   Size Id Type
/dev/sdd1        2048 1953525167 1953523120 931.5G 83 Linux

Disk /dev/sdb: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Disk model: Samsung SSD 850
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: 0x1efcfd6f

Device     Boot    Start       End   Sectors   Size Id Type
/dev/sdb1  *        2048    585727    583680   285M fd Linux raid autodetect
/dev/sdb2         585728  39647231  39061504  18.6G fd Linux raid autodetect
/dev/sdb3       39647232 918552575 878905344 419.1G fd Linux raid autodetect

Disk /dev/md0: 284.7 MiB, 298516480 bytes, 583040 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/md2: 419 GiB, 449865318400 bytes, 878643200 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/md1: 18.6 GiB, 19982712832 bytes, 39028736 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/md3: 931.4 GiB, 1000069595136 bytes, 1953260928 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

Disk /dev/mapper/md1_crypt: 18.6 GiB, 19980615680 bytes, 39024640 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/vg0-root: 9.3 GiB, 9999220736 bytes, 19529728 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/vg0-usr: 4.7 GiB, 4999610368 bytes, 9764864 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/vg0-var: 4.7 GiB, 4978638848 bytes, 9723904 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/md2_crypt: 419 GiB, 449863221248 bytes, 878639104 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

[bunch of lvms for vms]

3. History of the system

I installed jessie on this server in 2015 and remotely upgraded to
stretch and then to buster.

# uname -a
Linux XXXXX 4.19.0-10-amd64 #1 SMP Debian 4.19.132-1 (2020-07-24) x86_64
GNU/Linux

As with others, I was able to boot into d-i rescue mode and reinstall
grub and then it booted fine.

I hope this helps. It was definitely a surprise to find the server
unbootable at 1am this morning!

Thanks for all the work!

-Devin