[SOLVED] Problem in moving /var to new partition

Hi,
I setup a new systemd Arch instalation on an SSD and migrated successfully from my old initscripts based HDD setup. I have 2 problems now, one leading to another.
I wanted to move /var to a partition on HDD and followed the following steps.
Created a new reiserfs partition for var on my HDD using gparted. Labelled it as "var"
Rebooted to emergency mode and mounted it. (I remounted root as read-write)
# mount /dev/sda8 /mnt/new_var
Copied var contents to new_var
# cd /var
# cp -Rax * /mnt/new_var/
# cd /
# mv var var.old
# umount /mnt/new_var
# mkdir var
# mount /dev/sda8 /var
Added the following line to /etc/fstab
LABEL=var /var reiserfs defaults 0 1
When I reboot after this, systemd is timing out waiting for a var partition. Here is an pic taken during boot.
I restored the old var using the emergency shell and could reboot properly. I tried the same thing as a normal user using sudo after the system was up. (During the moving, I got sudo warnings because the sudo folder in /var/db wasnt there.)
With the new var partition in place, I proceeded to install a few packages. But when I rebooted, I the same thing happened again and had to get into emergency shell and restore the old var.
However, after this, the packages which I installed in the interim are not available in pacman database.
So,
1. How can I move /var to a separate partition and still keep systemd happy?
2. Is there a way to rescan or rebuild the pacman database? Will syncing the 2 different var setups that I've solve the problem? If so, how can I sync them?
Last edited by kungsu (2012-11-04 14:54:25)

I'm thinking in collision propabilities here. How probably might the device node change? I have machines that keep doing this without a real reason. I'd prefer labels on such machines. Other machines don't - without a real reason as well. I'd prefer device node notation on such machines. Labels can be changed manually, new partitions can be added and USB sticks with labled partitions can be inserted. While the USB situation should not be a big deal, both, labels as well as device nodes can be subject to changes, collisions and other arbitrary events. The only thing that is unlikely to change (for no obvious reason), be altered by accident or made collide with another one, are UUIDs.
I would not say using lables is bad, it's just that if you already have an issue, why not rule that out? It seemed to have solved the issue, it can be as easy as playing safe sometimes. Furthermore, the reason why I recommended to change the label from "var" to something else, is how common "var" is. It is like using a keyword in a programming language as a variable name, it may or may not work, so why not make it a habbit of not using such meta-keywords at all?
EDIT: There is no particular reason, I suspect the lable isn't set correctly. Maybe there is a problem with the partition table - that's where I'd suspect the LABLE to be stored.
Or maybe you just did the whole by-label thing wrong.
"/dev/disk/by-label/var" instead of LABEL="var"…
Last edited by Awebb (2012-11-04 15:27:43)

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Last edited by toad (2009-04-18 23:15:15)

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[SOLVED] Cloning boot and var partitions to a new drive for booting

Ok first of all here's my setup:
fakeraid (dmraid) / and home on an OCZ Revodrive
boot with GRUB on a flash drive (since fakeraid doesn't support grub)
var and downloads/media folder on a 500GB WD Caviar drive
When I originally installed Arch I had the Caviar drive in my home server in a RAID5 array, so that's why I opted to install boot and grub on a flash drive simply for booting. Now that I have the drive in my desktop I've cloned the flash drive's partitions and MBR using dd:
#dd if=/dev/sde of=~/MBR.img bs=512 count=1
#dd if=/dev/sde1 of=~/boot.img
#dd if=/dev/sdc1 of=~/var.img
I then backed up my downloads/media partition, then removed the partition table, then used dd to put the img files on the Caviar drive.
#dd if=~/MBR.img of=/dev/sdc bs=512 count=1
#dd of=~/boot.img of=/dev/sdc1
#dd of=~/var.img of=/dev/sdc2
I also created labels for the filesystems and put those in fstab.
I'm able to mount both partitions, however I can't boot from the drive. I get a 'grub hard disk error' (no error number) when I put it as my first drive in the BIOS.
I can still use the flash drive as the first hard drive in the BIOS and boot from it, then it mounts the dmraid root partition and boots successfully. It is also able to mount the var and boot partitions in fstab.
Basically the only problem is that the MBR is somehow wrong. I then tried booting back into an Arch live USB and installing GRUB from the prompt:
grub
grub>setup (hd4,0) (in this case the Caviar drive's boot partition was /dev/sde1
So essentially what I'm asking is how GRUB handles the MBR. Is it specific to the partition table of the drive in which it resides when it's originally installed? For instance, since I had an 8GB flash drive with 2 partitions when I installed GRUB, is the backed up MBR no good for a 500GB drive with 3 partitions?
I have everything backed up so I can start with a fresh /boot and /var if need be....I'm just not sure where to start.
Thanks in advance.
Last edited by DarksideEE7 (2011-02-13 23:25:31)

Sorry, I forgot to mention that I tried to install GRUB from the GRUB shell in a live Arch USB. It failed on a few non-critical parts, and succeeded on the last part. I'm going to try again shortly, possibly I did something wrong. GRUB is able to find the stage files using:
#grub
grub>find /grub/stage1
grub> find /grub/stage1
(hd0,0)
(hd5,0)
grub>
(hd0,0) is the desired boot drive, while (hd5,0) is the current bootable flash drive with /boot and GRUB installed.
Here is the output of fdisk -l:
WARNING: GPT (GUID Partition Table) detected on '/dev/sde'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sde: 2000.4 GB, 2000398934016 bytes
256 heads, 63 sectors/track, 242251 cylinders, total 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sde1 1 3907029167 1953514583+ ee GPT
Disk /dev/sdb: 60.0 GB, 60022480896 bytes
255 heads, 63 sectors/track, 7297 cylinders, total 117231408 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xedb72db9
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 206847 102400 7 HPFS/NTFS
/dev/sdb2 206848 117227519 58510336 7 HPFS/NTFS
Disk /dev/sdd: 40.0 GB, 40018599936 bytes
255 heads, 63 sectors/track, 4865 cylinders, total 78161328 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/sdd doesn't contain a valid partition table
Disk /dev/sdc: 40.0 GB, 40018599936 bytes
32 heads, 32 sectors/track, 76329 cylinders, total 78161328 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xb8372fcd
Device Boot Start End Blocks Id System
/dev/sdc1 32 21484543 10742256 83 Linux
/dev/sdc2 21484544 156317695 67416576 83 Linux
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x8497e059
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 206847 102400 83 Linux
/dev/sda2 206848 42149887 20971520 83 Linux
/dev/sda3 42149888 976773167 467311640 83 Linux
Disk /dev/dm-0: 80.0 GB, 80035053568 bytes
32 heads, 32 sectors/track, 152654 cylinders, total 156318464 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 131072 bytes
Disk identifier: 0xb8372fcd
Device Boot Start End Blocks Id System
/dev/dm-0p1 32 21484543 10742256 83 Linux
Partition 1 does not start on physical sector boundary.
/dev/dm-0p2 21484544 156317695 67416576 83 Linux
Disk /dev/dm-1: 11.0 GB, 11000070144 bytes
255 heads, 63 sectors/track, 1337 cylinders, total 21484512 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 131072 bytes
Alignment offset: 49152 bytes
Disk identifier: 0x00000000
Disk /dev/dm-1 doesn't contain a valid partition table
Disk /dev/dm-2: 69.0 GB, 69034573824 bytes
255 heads, 63 sectors/track, 8392 cylinders, total 134833152 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 131072 bytes
Disk identifier: 0x00000000
Disk /dev/dm-2 doesn't contain a valid partition table
Disk /dev/sdf: 8086 MB, 8086618112 bytes
249 heads, 62 sectors/track, 1023 cylinders, total 15794176 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x8497e059
Device Boot Start End Blocks Id System
/dev/sdf1 * 62 200693 100316 83 Linux
/dev/sdf2 200694 15794175 7796741 83 Linux
I'm using dmraid, so just to be clear I've configured the raid using:
#modprobe dm_mod
#dmraid -ay
Then I saw the array stored in /dev/mapper/silXXXXX. I then created partitions for /boot, /, and home. At that time I was hoping to get GRUB working with the AUR package grub2-dmraid. I wasn't able to get it working for some time, so I just went ahead and installed boot and GRUB to a separate USB flash drive.
Here is the output of df -h:
Filesystem Size Used Avail Use% Mounted on
udev 10M 268K 9.8M 3% /dev
/dev/mapper/sil_bgbgdjaddicbp1
11G 5.3G 4.3G 56% /
shm 6.0G 584K 6.0G 1% /dev/shm
/dev/mapper/sil_bgbgdjaddicbp2
64G 38G 23G 63% /home
/dev/sda1 95M 16M 75M 18% /boot
/dev/sda2 19G 142M 19G 1% /var
/dev/sda3 439G 148G 269G 36% /home/l33/Torrents
none 1000M 132K 1000M 1% /tmp
shm 6.0G 584K 6.0G 1% /dev/shm
/dev/sde1 1.8T 1.1T 665G 62% /mnt/Green
and cat /etc/mtab
proc /proc proc rw,nosuid,nodev,noexec,relatime
sys /sys sysfs rw,nosuid,nodev,noexec,relatime
udev /dev devtmpfs rw,nosuid,relatime,size=10240k,nr_inodes=1022975,mode=755
/dev/mapper/sil_bgbgdjaddicbp1 / ext4 rw,noatime,barrier=1,stripe=32,data=ordered
devpts /dev/pts devpts rw 0 0
shm /dev/shm tmpfs rw,nosuid,nodev 0 0
/dev/mapper/sil_bgbgdjaddicbp2 /home ext4 rw,noatime 0 0
/dev/sda1 /boot ext2 rw 0 0
/dev/sda2 /var reiserfs rw,noatime 0 0
/dev/sda3 /home/l33/Torrents ext4 rw,noatime 0 0
none /tmp tmpfs rw,nosuid,nodev,noatime,size=1000M,mode=1777 0 0
shm /dev/shm tmpfs rw,nosuid,nodev,size=6G 0 0
rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
nfsd /proc/fs/nfsd nfsd rw,noexec,nosuid,nodev 0 0
/dev/sde1 /mnt/Green ext4 rw 0 0
Also I don't have a /proc/mdstat. That's only for mdadm RAID setups, right? It's been quite some time since I've used mdadm so I can't remember.
EDIT:
So I booted into a live Arch USB and entered the grub shell. I ran:
#grub
grub> root (hd3,0)
Filesystem type is ext2fs, partition type 0x83
grub> setup (hd3)
Checking if "/boot/grub/stage1" exists.....no
Checking if "/grub/stage1 exists.......yes
Checking if "/grub/stage2 exists.......yes
Checking if "/grub/e2fs_stage1_5 exists....yes
Running "embed /grub/e2fs_stage1_5 (hd3)".....25 sectors are embedded.
succeeded
Running "install /grub/stage1 (hd3) (hd3))1+25 p (hd3,0)/grub/stage2 /grub/menu.lst".......succeeded
Done.
Last time I recall more errors than this, then it reporting that one was a non-critical error, so I think the problem may be solved. More to come.
Last edited by DarksideEE7 (2011-02-13 23:18:44)

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/dev/sdb4 141472128 250069679 108597552 51.8G 83 Linux (Current Arch /home)
/dev/sdc2 * 206848 105064447 104857600 50G 83 Linux (New Arch /)
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After I resized the filesystems, I then created a new grub.cfg file (on /dev/sdb3) that is aware of the new Arch system. I can boot to both my current and new Arch installs and run them fine, but ultimately I want to remove the current Arch install so I can make more room for my Windows 7 install. What do I need to do to grub, so it knows to use the new Arch system.
Last edited by tlawren (2014-08-17 21:42:46)

@Xyne - Thanks! Installing grub on my /dev/sdc did the trick. Because I dd'ed my old setup to a new drive, /boot/grub was already populated, so all I had to do was install and configure grub on the new drive via the following.
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grub-mkconfig -o /boot/grub/grub.cfg
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In Oracle Enterprise Manager, in the left-hand tree view, expand Security then Users inside the relevant Databases entry.
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Create Any Table
Create Any Sequence
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Regards
Stuart

Problem in Creating New partition in Pavilion dm4 1217TX

I have a hp Pavilion dm4 1217TX model laptop. I want to partition the hard disk (640GB) to separate the OS to the data. I think this is a very basic safety feature that will save my data in case of Windows failure (which is a very common problem). I have already split the C Drive and the new condition of my hard drive is
System           199 MB       Primary
C                        70 GB       Primary
Unallocated   494 GB       Logical
Recovery           32 GB       Primary
HP Tools        103 MB      Primary
Now I can't create partition in the Unallocated space because of 4 Primary Partition it already has. Now what can I do ? I can't understand that why it comes with four Primary Partition and without any Extended partition.

Hi, there, I have the same problem with you, because of the OEM of the laptop, they have partitioned our hard drive in advanced, however this partition is not logical. As we know, when we install Windows7, the system partition and system reserved partition are set as primary partition without doubt, but how could they make the HP tools and other partition as primary partitino too. I'm very unhappy with this. I don't know WHAT are they thinking about. Every one who has a bit comptuer knowloage knows the rules of createing new partitions in Windows. In my situation, I could only copy the data on recovery to C drive, then delete it. and recreate logical partition, then copy it back. Hope this could also help you.

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Regards and Good luck!
mini x
(Sorry for my 'painful' English!)

I encountered a kernal panic for CPU 0) unable to find driver for this platform: "PowerBook 5,2")
I believe that driver is munged on the HD, or the HD is munged, seen several just like that on 2.5" drives, never on a 3.5"er btw.
If you can copy/retrieve your important data, I think you need to Zero the internal HD & start over, though if Permissions get repaired on it, you might try a reinstall of the latest big Combo Update... 2nd an Archive & install.

Problem after moving to new house

I previously had no problem with wireless Airport Express connected via cable modem.
Now I've moved to a new house and cannot get it to work. Same Internet Service Provider. The green light on AX is on. Internet Connect utility says I am connected to AX, and that AX is connected to the internet via ethernet (?). My MacBook recognizes the AX name and says it's connected wirelessly. But then I open Safari and cannot connect to the internet.
I've reset AX by pressing the little reset button, and also reset it through Airport Utility. No luck.
Finally, my wireless connection works fine through a neighbor's system.
The only thing I know of left to try is connecting via an ethernet cable, which I don't have now.

Oh, and I can use AX to play music wirelessly just fine.

[Solved] Integrating new Partitions into the Filesystem

Hello,
I reinstalled arch a couple days ago. I'm not using GPT with
/var, /boot, / , and /home partitions.
However, during the installion, i didnt add /var, /boot, and /home to my fstab [ i assumed genfstab would do this]
Thus, i've only been using one of my partions, my root partition.
So, now that i've discovered this, i would like to use them [20gb is not enough for me lol]
However, i've already installed lots of programs and the /var, /boot/ and /home directories on my root partition are full of stuff.
So how do i integrate these partitions into my filesystem? I need to copy all the files from the /var, /boot, and /home directories onto the
/var, /boot, and /home partitions.
I could just mount each onto a dummy directory, copy the files onto their respective partition, umount, then remount onto the correct directories.
Is that the safest sequence of steps to take? If not what is?
Thank you
Last edited by fawkes5 (2013-04-24 08:13:47)

lol. Didn't see the arch wiki post on this exact issue. The steps i outlined are those suggested by the wiki.
Add new partitions to an existing system
Should this be marked for deletion?
Last edited by fawkes5 (2013-04-24 01:39:43)

How to Reconnect Offline Pictures Moved to New Partition

I recently partitioned my C drive and moved My Pictures (not using PE Organizer) to the new partition ("J" Drive) to separate data files from program files. I now have 25,000 pictures that are offline. How do I reconnect to the folders containing these pictures?
Windows 7 Home Premium
Photo Elements 9

Above mentioned workflow is absolutely correct, but here is some info which will help you in understanding it better through detailed steps - http://bit.ly/Jo9zhc

[SOLVED] Problem in moving /var to new partition

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