Kaiten: Added to Terastation

Kaiten — Sun, 11 Nov 2007 09:12:46 GMT

Added to Terastation

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	== Abstract ==		== Abstract ==

Ramuk: 1 revision(s)

Ramuk — Sat, 10 Nov 2007 17:05:20 GMT

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Revision as of 17:05, 10 November 2007

Jutta at 08:41, 3 September 2007

Jutta — Mon, 03 Sep 2007 08:41:12 GMT

New page

== Abstract ==

This section shows how to create your own "emergency boot" partition. So even if your system has completely crashed, you could run it.

== Prerequisites ==

You need the [[Fail Safe Firmware]] and a memory stick / usb drive.

== here we go ==

1. Have a clean usb partition and partition it (mfdisk -c /dev/sda) as sda1 (the first usb you put into your terastation is sda). It should have about 371MB. Format it xfs or ext2. Touch the file INIT-SYSBACKUP and reboot. (!!: if it is drive, it is automounted to /mnt/usbdisk1, if it is a stick it is not automounted - I used a stick)

TERASTATION login: myroot
root@TERASTATION:~# mkfs.xfs -f /dev/sda1
meta-data=/dev/sda1 isize=256 agcount=8, agsize=31812 blks
= sectsz=512
data = bsize=4096 blocks=254490, imaxpct=25
= sunit=0 swidth=0 blks, unwritten=1
naming =version 2 bsize=4096
log =internal log bsize=4096 blocks=1200, version=1
= sectsz=512 sunit=0 blks
realtime =none extsz=65536 blocks=0, rtextents=0
root@TERASTATION:~# mkdir /mnt/sda1
root@TERASTATION:~# mount /dev/sda1 /mnt/sda1
root@TERASTATION:~# touch /mnt/sda1/INIT-SYSBACKUP
root@TERASTATION:~# reboot

2. After booting your system has been copied to your stick. If you touch the file /etc/HD-HTGL-EM, then your system is booted from sda1, bypassing other checks. To have Complete Functionality , some other corrections are neccessary. (See below)

TERASTATION login: myroot
root@TERASTATION:~# mount /dev/sda1 /mnt/sda1
root@TERASTATION:~# cd /mnt/sda1
root@TERASTATION:/mnt/sda1# touch etc/HD-HTGL-EM
root@TERASTATION:/mnt/sda1# vi etc/fstab

# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
/dev/sda1 / auto defaults,noatime 0 0
/dev/md0 /mnt/teraroot auto defaults,ro 0 0
proc /proc proc defaults 0 0
/dev/hda2 swap swap defaults 0 0
/dev/hdc2 swap swap defaults 0 0
/dev/hde2 swap swap defaults 0 0
/dev/hdg2 swap swap defaults 0 0

root@TERASTATION:/mnt/sda1# mkdir mnt/teraroot
root@TERASTATION:~# reboot

3. After you reboot your system, it boots from stick.

TERASTATION login: myroot
root@TERASTATION:~# mount
/dev/sda1 on / type auto (rw,noatime)
proc on /proc type proc (rw)
/dev/shm on /mnt/ram type tmpfs (rw,mode=1777,size=15m)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/md0 on /mnt/teraroot type xfs (ro)
/dev/md1 on /mnt/array1 type xfs (rw,noatime)
/dev/md2 on /mnt/array2 type xfs (rw,noatime)
/proc/bus/usb on /proc/bus/usb type usbdevfs (rw)

Do not worry, if the power led blinks yellow after booting, this is intended.

== Complete Functionality ==

To have terastation check your disks (and blinking nicely with red LEDs if a disk fails), following conditions must be met:

# the system partion /dev/md0 must be
## built from /dev/hda1 /dev/hdc1 /dev/hde1 /dev/hdg1
## up and
## mounted (no matter where)
# the data partitions, e.g. raid1 /dev/md1 /dev/md2 must also be
## built from their intended partitions hd'x'3
## up and
## mounted

The system can be run from a different location. You e.g. could use the last partition hd'x'4, which is probably used as a 'safety margin' to build /dev/md3.

How-to courtesy of André [http://terastation.wiki.homelinux.net/wikish/index.html]

Emergency Boot - Revision history

Kaiten: Added to Terastation

Ramuk: 1 revision(s)

Jutta at 08:41, 3 September 2007