LinuxQuestions.org - [SOLVED] Possible to mount LV?

- Linux - Newbie (https://www.linuxquestions.org/questions/linux-newbie-8/)

- - Possible to mount LV? (https://www.linuxquestions.org/questions/linux-newbie-8/possible-to-mount-lv-852297/)

Possible to mount LV?

Alright, I'm a complete newbie when it comes to Linux. I've fooled around with some desktop distros before, but briefly. I set up a server a few months ago just as a first shot at this and it worked great, I had a full LAMP stack running, had vsftp running and everything was running smooth but I like poking so I poked in the wrong places and basically brought my setup to its knees and was forced to do a clean install. That being said, I'm a quick learner and am eager to learn more, but I've hid a roadblock as far as Google search help goes.

My goal: Give my old desktop new life as both a location for backing up with Time Machine, and a place to store, access (any maybe stream?) my files. (Streaming is obviously for media files, but I would like to be able to access it via FTP as well so I can just download the occasional file)

My setup: Pentium P4 3.2 GHz, 1GB RAM, 2 HDD (1x 160 GB, 1x 250GB)

My current issue: So I used the LVM to allocate 10GB of the 160GB HDD to actual install of Ubuntu Server 10.10, currently have a LAMP stack, OpenSSH, and Samba running.
I want to ideally use the rest of the 150 GB of the partition as the space for my Time Machine backups and the other HDD as my media storage. Here is my fdisk return:

Code:

Disk /dev/sda: 160.0 GB, 160041885696 bytes

255 heads, 63 sectors/track, 19457 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000382



  Device Boot      Start        End      Blocks  Id  System

/dev/sda1  *          1          32      248832  83  Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2              32      19458  156039169    5  Extended

/dev/sda5              32      19458  156039168  8e  Linux LVM



Disk /dev/sdb: 251.0 GB, 251000193024 bytes

179 heads, 63 sectors/track, 43472 cylinders

Units = cylinders of 11277 * 512 = 5773824 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/sdb1              1      43473  245117344+  83  Linux



Disk /dev/dm-0: 9521 MB, 9521070080 bytes

255 heads, 63 sectors/track, 1157 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000



Disk /dev/dm-0 doesn't contain a valid partition table



Disk /dev/dm-1: 473 MB, 473956352 bytes

255 heads, 63 sectors/track, 57 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000



Disk /dev/dm-1 doesn't contain a valid partition table

When I try to mount the second part of the LVM as a physical volume, I'm getting an issue that I can't use lvcreate while the group is active. I'm not sure if this is possible or even a good idea to start off with. Any suggestion is welcome, please keep in mind that this is my first attempt at setting up a server where I'm not following a tutorial word for word so I am oblivious to the obvious.

Please give more detail on "So I used the LVM to allocate 10GB of the 160GB HDD to actual install of Ubuntu Server 10.10". What is the output of lvdisplay?

Quote:

Originally Posted by catkin (Post 4202581)

Please give more detail on "So I used the LVM to allocate 10GB of the 160GB HDD to actual install of Ubuntu Server 10.10". What is the output of lvdisplay?

Sorry - here it is:

Code:

  --- Logical volume ---

  LV Name                /dev/799cfb/root

  VG Name                799cfb

  LV UUID                NC5Mj4-pxdx-EOES-VgdW-F2ga-PCl8-CuF6QY

  LV Write Access        read/write

  LV Status              available

  # open                1

  LV Size                8.87 GiB

  Current LE            2270

  Segments              1

  Allocation            inherit

  Read ahead sectors    auto

  - currently set to    256

  Block device          251:0

  

  --- Logical volume ---

  LV Name                /dev/799cfb/swap_1

  VG Name                799cfb

  LV UUID                asHll1-06UN-Qk0d-KBLy-2JEj-EpF7-sbtWvJ

  LV Write Access        read/write

  LV Status              available

  # open                1

  LV Size                452.00 MiB

  Current LE            113

  Segments              1

  Allocation            inherit

  Read ahead sectors    auto

  - currently set to    256

  Block device          251:1

So I did some more digging around and turns out I was just using the lvcreate command wrong (might have been the lack of sleep :S, who knows?) Anywho, I tried it this morning with the following:

Code:

sudo lvcreate -l 100%FREE -n timemachine 799cfb

(I was basically trying to allocate the remaining size of the PV to an LV to backup my time machine to). Now my lvdisplay returns:

Code:

  --- Logical volume ---

  LV Name                /dev/799cfb/root

  VG Name                799cfb

  LV UUID                NC5Mj4-pxdx-EOES-VgdW-F2ga-PCl8-CuF6QY

  LV Write Access        read/write

  LV Status              available

  # open                1

  LV Size                8.87 GiB

  Current LE            2270

  Segments              1

  Allocation            inherit

  Read ahead sectors    auto

  - currently set to    256

  Block device          251:0

  

  --- Logical volume ---

  LV Name                /dev/799cfb/swap_1

  VG Name                799cfb

  LV UUID                asHll1-06UN-Qk0d-KBLy-2JEj-EpF7-sbtWvJ

  LV Write Access        read/write

  LV Status              available

  # open                1

  LV Size                452.00 MiB

  Current LE            113

  Segments              1

  Allocation            inherit

  Read ahead sectors    auto

  - currently set to    256

  Block device          251:1

  

  --- Logical volume ---

  LV Name                /dev/799cfb/timemachine

  VG Name                799cfb

  LV UUID                kV13J1-t9X8-qVU2-01Ch-Vrk8-BQQ3-gw3RLn

  LV Write Access        read/write

  LV Status              available

  # open                0

  LV Size                139.50 GiB

  Current LE            35712

  Segments              1

  Allocation            inherit

  Read ahead sectors    auto

  - currently set to    256

  Block device          251:2

So you've got the LVs OK. I don't understand the two fdisk output lines like "Disk /dev/dm-0 doesn't contain a valid partition table" and how it might relate to LVs. Somehow Ubuntu always manages to make things more complicated that I think they should be!

Quote:

Originally Posted by catkin (Post 4202817)

Yeah, I have no clue what they might be to be honest. I'm hoping it goes away once I format & partition the second hard drive. But I do agree with you, Ubuntu does makes things extremely complicated but I hear its one of the easiest distros for a beginner to use especially when setting up a home server. Got any other suggestions? I'm pretty much still at the set up stage so I'm willing to start from scratch if it will make life easier.

Having set up the LVs the next step is to format them with a file system. The question is "which devices are they"? What's the output of lvscan?

Quote:

Originally Posted by catkin (Post 4202825)

Having set up the LVs the next step is to format them with a file system. The question is "which devices are they"? What's the output of lvscan?

Code:

 ACTIVE            '/dev/799cfb/root' [8.87 GiB] inherit

  ACTIVE            '/dev/799cfb/swap_1' [452.00 MiB] inherit

  ACTIVE            '/dev/799cfb/timemachine' [139.50 GiB] inherit

Seems like what I want it to be right? (Ignoring the second drive which I haven't partitioned yet)

LVs don't need partitioning -- they are in effect a single partition.

The swap partition does not need any further preparation (well -- I've never done so) -- it only needs adding to /etc/fstab as a swap partition, something like

Code:

/dev/799cfb/swap_1 swap swap defaults 0 0

The timemachine you need to create file systems on with something like

Code:

mkfs.ext4 /dev/799cfb/timemachine

depending on which file system you want to use.

Is the /dev/799cfb/root LV already in use? df -hT would show.

All this with the caveat that I'm writing from ordinary Linux experience so it might fall foul of Ubuntu-isms.

Thanks a lot for the help! I have it set up perfectly now (after a lot of struggles..but most of it was setting up with AFP and whatnot)