Re: GRUB2 for Debian 8 in an i586

[Narcis Garcia]

CASE 7: Three hard disks
/dev/sda1 primary for 10GB Ext4 mounted on /boot
/dev/sdb1 primary for 10GB volume for RAID
/dev/sdc1 primary 10GB volume for RAID
/dev/md0 for all space (20GB) Ext4 mounted on /
error: unknown filesystem.
Entering rescue mode...
grub rescue> _

CASE 8: Three hard disks
/dev/sda1 primary for 10GB Ext4 mounted on /
/dev/sdb1 primary for 10GB volume for RAID
/dev/sdc1 primary 10GB volume for RAID
/dev/md0 for all space (20GB) Ext4 mounted on /home
Succeeds: boots operating system.



El 23/11/17 a les 18:30, Narcis Garcia ha escrit:
> Hello,
> 
> I've tried many combinations of a fresh Debian 8 installation on a
> computer with «Intel Pentium MMX» at 200MHz processor.
> 
> Debian CD boots and DebianInstaller performs all processes without any
> problem, including the GRUB bootloader install (all cases at /dev/sda)
> 
> GRUB only boots installed system when there is only a sigle partition
> for everything. GRUB fails to read on boot any filesystem if there are
> two partitions.
> 
> CASE 1: Single drive
> /dev/sda1 primary for all space (32GiB) Ext4 mounted on /
> Succeeds: boots operating system.
> 
> CASE 2: Single drive
> /dev/sda1 primary for 1GB Ext4 mounted on /boot
> /dev/sda2 primary for 10GB Ext4 mounted on /
> error: unknown filesystem.
> Entering rescue mode...
> grub rescue> ls
> (hd0) (hd0,msdos1) (hd0,msdos2) (fd0)
> grub rescue> ls (hd0,msdos1)/
> (hd0,msdos1): Filesystem is unknown.
> 
> CASE 3: Three hard disks
> /dev/sda1 primary for 10GB Ext4 mounted on /
> /dev/sdb blank
> /dev/sdc blank
> Succeeds: boots operating system.
> 
> CASE 4: Three hard disks
> /dev/sda1 primary for 1GB Ext4 mounted on /boot
> /dev/sda2 primary for 10GB Ext4 mounted on /
> /dev/sdb blank
> /dev/sdc blank
> error: unknown filesystem.
> Entering rescue mode...
> grub rescue> ls
> (hd0) (hd0,msdos1) (hd0,msdos2) (hd1) (hd2) (fd0)
> grub rescue> ls (hd0,msdos1)/
> (hd0,msdos1): Filesystem is unknown.
> 
> CASE 5: Three hard disks
> /dev/sda1 primary for all space (32GiB) volume for RAID
> /dev/sdb1 primary for all space (32GiB) volume for RAID
> /dev/sdc1 primary for all space (32GiB) volume for RAID
> /dev/md0 for all space (100GB) Ext4 mounted on /
> error: disk `mduuid/a867853f5e9773488fa4911285e2db93´ not found.
> Entering rescue mode...
> grub rescue> ls
> (hd0) (hd0,msdos1) (hd1) (hd1,msdos1) (hd2) (hd2,msdos1) (fd0)
> grub rescue> ls (hd0,msdos1)/
> (hd0,msdos1): Filesystem is unknown.
> 
> CASE 6: Three hard disks
> /dev/sda1 primary for 1GiB Ext 4 mounted on /boot
> /dev/sda2 primary for 31GiB volume for RAID
> /dev/sdb1 primary for 1GiB unused
> /dev/sdb2 primary for 31GiB volume for RAID
> /dev/sdc1 primary for 1GiB unused
> /dev/sdc2 primary for 31GiB volume for RAID
> /dev/md0 for all RAID space (~100GB) Ext4 mounted on /
> error: unknown filesystem.
> error: disk `mduuid/a867853f5e9773488fa4911285e2db93´ not found.
> Entering rescue mode...
> grub rescue> ls
> (hd0) (hd0,msdos1) (hd0,msdos2) (hd1) (hd1,msdos1) (hd1,msdos2) (hd2)
> (hd2,msdos1) (hd2,msdos2) (fd0)
> grub rescue> ls (hd0,msdos1)/
> (hd0,msdos1): Filesystem is unknown.
> 
> OTHER CASES:
> - Tried with Ext3 filesystem with same results.
> - Tried a Live-boot to chroot and perform "update-grub" + "grub-install
> /dev/sda". Commands succeeded with no errors.
> - Filesystem & contents are consistent in all cases.
> 
> 
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