The `sys` utility writes to the wrong MBR (original) (raw)

When trying to use the sys command to prepare hdb1, the MBR for hda is overwritten.

The system has two HDDs. I was trying to prepare hdb1 (and the MBR for hdb) for ELKS. I had booted ELKS from 1.44 MB floppy. When I gave the command:

..I expected the MBR of hdb to be prepared with the boot loader, but instead hda was overwritten, which sadly cuzed the Devuan MBR. This was with ELKS 0.8.0, but I've since confirmed that 0.9.0-dev does the same in Qemu.

Version (commit or release): 0.9.0-dev
Emulator or HW platform: i440BX / Qemu
Does the problem always happen ? Yes

To reproduce:
Start Qemu with two disk drives:

qemu-system-i386 -name elks -machine isapc -cpu 486 -m 32 -nographic -drive file=/tmp/hda.img,index=0,media=disk,format=raw -drive file=/tmp/hdb.img,index=1,media=disk,format=raw -nic model=ne2k_isa -boot c

Then ask it to:

It says:

Installing/updating ELKS on -M
System on /dev/hda: Minix (CHS 63/16/63 at offset 0)
Writing MBR on /dev/hda
Target on /dev/hdb1: Minix (CHS 65/16/63 at offset 63)
Bootblock written
Copying /linux to /tmp/mnt/linux
Copying /bootopts to /tmp/mnt/bootopts
System copied
Creating /dev
Copying /bin
Copying /etc
Finished successfully.

(Note that the MBR on hda rather than hdb is overwritten).

The sys utility writes to the wrong MBR (original) (raw)

The `sys` utility writes to the wrong MBR (original) (raw)