Tag Archives: grub

Archlinux SAMBA Fileserver Btrfs Qnap TS-459 PRO II

I’ve got an used half dead Qnap TS-459 PRO II in hands. The original Qnap OS won’t detect the installed disks not quite stable, due to a faulty Marvell SATA-Controller Chip.
The other Marvell SATA-Controller works fine. So only 2 of 4 disks are working.

Archlinux has very good btrfs support due to the fresh packages. Otherwise I would have used debian or ubuntu.

Problems with this special type of hardware:
*) Bios does not detect the connected disks on this devices, thus you only can boot from the internal USB device

You have to set /boot to the internal USB-Device

I’ve changed the /boot/grub/grub.cfg at the first line

set root=’mduuid/daa55d04:df1b4f59:52419904:51489ef3′

set root=’hd0,msdos1′

Now grub is reading it’s config files from that USB-Device.

WARNING! If you recreate your grub.conf with gurb-mkconfig -o /boot/grub/grub.cfg this change will be overwritten. I was to lazy to fix that ๐Ÿ™‚

Archlinux booting from Software-RAID you have to:

mdadm –detail –scan >> /etc/mdadm.conf

vim /etc/mkinitcpio.conf

HOOKS=(base udev autodetect modconf block filesystems keyboard fsck mdadm btrfs)

mkinitcpio -p linux

mdadm will include the /etc/mdadm.conf in initramfs. I’m using btrfs for root and data partitions. Therefore I’ve added btrfs just in case :-). Normally it will be automatically included.

You also want some periodic check of your RAID consistency. This device has really old used disks built in. So I’ve “stolen” the checkarray script from an ubuntu installation and created a systemd timer


Description=Software RAID checkarray timer

Description=Software RAID checkarray service
ExecStart=/usr/local/sbin/checkarray –all –idle –quiet

Might you want to have lm_sensors support.
*) vim /etc/modules-load.d/sensors.conf
*) Install lm_sensors and run pwmconfig.

Fancontrol runs really nice on this board!

Here my samba config file if you need it. I’ve enabled samba audit for the “daten” share. Very handy to handle Crypto-Trojans faster and easier.

workgroup = nas01.local
server string = nas01
domain logons = No
domain master = No
printing = bsd
security = user
hosts allow =
printcap name = /dev/null
#Windows XP fix
lanman auth = yes
ntlm auth = yes
full_audit:failure = none
full_audit:success = mkdir rename unlink rmdir pwrite write
full_audit:prefix = IP=%I|USER=%u|MACHINE=%m|VOLUME=%S
full_audit:facility = local7
full_audit:priority = NOTICE

comment = daten
hosts allow =
path = /daten/samba/daten
read only = No
valid users = daten
available = yes
create mode = 0644
directory mode = 0755
vfs objects = full_audit

comment = daten
hosts allow =
path = /daten/samba/backup
read only = No
valid users = backup
available = yes
create mode = 0644
directory mode = 0755

comment = daten
hosts allow =
path = /daten/.snapshots
force user = root
valid users = daten
read only = yes
available = yes

I’ve enabled btrfs snapshots with snapper and the corresponding systemd-timers of the Archlinux package. Useful if you want to recover accidentally deleted or overwritten files

WARNING! Snapshots do not replace a real Backup!

This device has also an LCD Display. Someone has written a very good ksh script dealing with it.

I don’t need all of this goodness. So I wrote my on crappy script to display only the Information I need ๐Ÿ™‚ It does what it should do ๐Ÿ™‚


Have fun!

Ubuntu 16.04 EFI Boot Software Raid


I tried to setup the “EFI System” partition at install time with software RAID1 array. I tried to avoid installing the bootloader to every disk. (I had an RAID1 with spare)

The ubuntu installer allows to set as partition type “EFI System” on the software RAID array. So I thought it would work.

After successful installation the BIOS of the Supermicro mainboard has not found any EFI-Boot partition.

So I destroyed the software RAID of theย “EFI System” and installed the bootloader in chroot from a Debian-Live system. I had not to change the partition flag. It was already setup right to “EFI System”

mdadm -S /dev/mdX
mdadm --zero-superblock /dev/sda1
mdadm --zero-superblock /dev/sdb1
mdadm --zero-superblock /dev/sdc1

mkfs.vfat /dev/sda1
mkfs.vfat /dev/sdb1
mkfs.vfat /dev/sdc1

mount /dev/md[RootFileSystemWithBoot] /mnt
mount --bind /dev /mnt/dev
mount --bind /sys /mnt/sys
mount --bind /proc /mnt/proc

chroot /mnt

Now we remove the RAID array from config file

vim /etc/mdadm.conf

Edit your fstab

blkid /dev/sda1
vim /etc/fstab

And last but not least install grub

mount /dev/sda1 /boot/efi
grub-install /dev/sda1
umount /boot/efi

mount /dev/sdb1 /boot/efi
grub-install /dev/sdb1
umount /boot/efi

mount /dev/sdc1 /boot/efi
grub-install /dev/sdc1


Hint: You have to use a install media or live system which is EFI Boot capable and force BIOS to boot from EFI. (You could use my USB Stick). Otherwise EFI support in Linux is disabled.

Have fun!

make Ubuntu server powerloss proof


Sometimes, after powerloss Ubuntu hangs on boot or asking to fix filesystem errors.
To avoid this problems simply edit following files:

Edit the file:


After that you have to rebuild grub configuration:


Edit the file:


EDIT 16.05.2018:
Ubuntu 18.04 /etc/default/rcS missing due to systemd
You have to pass a kernel parameter


GRUB_CMDLINE_LINUX_DEFAULT="quiet splash fsck.repair=yes"

Dont forget to run update-grub

Have fun!