Change root partition
Hi all,
how do I change the root partition in my qnap ts-209? I assume I have to
create a new image and copy it to the flash, right?
Just for the background: I've installed debian on my qnap (btw: thank you for
the good work!) and some time later I've added a second hard disk. So I've
converted all partitions into raid1 devices - except the root device
(dev/sda2) which is always in use after boot. All references to /dev/sda2 are
removed from /etc/fstab. (Don't know if its a 'good' installation, but I'm
very lazy and for me it was the easiest way to turn the system into a raid1.)
After booting / is mounted on my new root partition, but a lot of processes
are already running which reference to the old root partition. Looks like the
switch of the root partition happens to late during system startup.
Some details from my config:
nas:~# mount
/dev/md1 on / type ext3 (rw,errors=remount-ro)
tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
udev on /dev type tmpfs (rw,mode=0755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620)
/dev/md0 on /boot type ext2 (rw)
/dev/md5 on /home type ext3 (rw)
/dev/md4 on /tmp type ext3 (rw)
/dev/md2 on /usr type ext3 (rw)
/dev/md3 on /var type ext3 (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)
nas:~# cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/md1 / ext3 errors=remount-ro 0 1
/dev/md0 /boot ext2 defaults 0 2
/dev/md5 /home ext3 defaults 0 2
/dev/md4 /tmp ext3 defaults 0 2
/dev/md2 /usr ext3 defaults 0 2
/dev/md3 /var ext3 defaults 0 2
/dev/sda7 none swap sw 0 0
/dev/sdb7 none swap sw 0 0
nas:~# mdadm --add /dev/md1 /dev/sda2
mdadm: Cannot open /dev/sda2: Device or resource busy
nas:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4]
[raid10]
md0 : active raid1 sda1[0] sdb1[1]
248896 blocks [2/2] [UU]
md1 : active (auto-read-only) raid1 sdb2[1]
273024 blocks [2/1] [_U]
...
nas:~# fuser -m /dev/sda2
/dev/sda2: 1rce 2rc 3rc 4rc 5rc 6rc 47rc
52rc 81rc 82rc 83rc 84rc 198rc 199rc 200rc 232rc 300rc
301rc 304rc 306rc 689rc696rc 706rc 714rc 723rc 733rc 745rc
749rc 773rc 856rce 1188rc 1443rc 1444rc1445rc 1447rc 1502rce 1522re
1602rcm 1636rcm 1821rce 1929rcm 1937rm 1955rc 1972rc 1973rc 1974rc
1975rc 1976rc 1977rc 1978rc 1979rc 1980rc 1981rc 1985rm 1996rcm
2007rcm 2009rcm 2023rcm 2028rcm 2034rcm 2038rce 2056rcm 2060rcm
2062rcm 2065rm 2085rm 2099rcm2120rcm 2122rcm 2124rcm 2126rcm 2127rcm
2140re 2141rcm 2143rce
nas:~# ps -ef |grep 2124
www-data 2124 2099 0 22:22 ? 00:00:00 /usr/sbin/apache2 -k start
root 2170 2143 0 22:45 pts/0 00:00:00 grep 2124
Looks like apache has been started before reading /etc/fstab and switching to
the new root. Its strange, isn't it?
Mathias
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