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net-0
Tux's lil' helper
Joined: 04 Dec 2006
Posts: 103
Location: Lodi, California
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 Posted: Tue Dec 11, 2007 5:17 am Post subject: SOLVED - dmraid and LVM2 Questions and maybe suggestions |
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I have a question I wanted to post before I go to sleep tonight.... maybe someone has a quick response.
If not I will continue on this project tomorrow =)
This is the material that I have been using to make this little project.
http://gentoo-wiki.com/Installing_on_LVM2_And_Raid5#device.map
and
http://gentoo-wiki.com/HOWTO_Install_Gentoo_on_an_LVM2_root_partition
I have got most of what I wanted working.... except this problem.....
I can't mount my lvm partitions.... when I lvdisplay it says this,
| Code: | fileserver ~ # lvdisplay
/dev/mapper/control: stat failed: Too many levels of symbolic links
/dev/mapper/control: mknod failed: File exists
Failure to communicate with kernel device-mapper driver.
--- Logical volume ---
LV Name /dev/vg/usr
VG Name vg
LV UUID j5AWJY-3TuC-BPxN-bVqK-OePB-b9MZ-EY6pAV
LV Write Access read/write
LV Status NOT available
LV Size 10.00 GB
Current LE 2560
Segments 1
Allocation inherit
Read ahead sectors 0
--- Logical volume ---
LV Name /dev/vg/home
VG Name vg
LV UUID kjte2c-MfkR-jKAZ-0PGE-zAgo-Iwcx-1s2eFn
LV Write Access read/write
LV Status NOT available
LV Size 800.00 GB
Current LE 204800
Segments 1
Allocation inherit
Read ahead sectors 0
--- Logical volume ---
LV Name /dev/vg/opt
VG Name vg
LV UUID SH1LIC-GORn-wMJg-XegP-Fs77-uwu3-yd2bIQ
LV Write Access read/write
LV Status NOT available
LV Size 5.00 GB
Current LE 1280
Segments 1
Allocation inherit
Read ahead sectors 0
--- Logical volume ---
LV Name /dev/vg/var
VG Name vg
LV UUID zNcztI-lgRE-vO2J-Bm0c-L1gw-nqo8-yGoe0e
LV Write Access read/write
LV Status NOT available
LV Size 10.00 GB
Current LE 2560
Segments 1
Allocation inherit
Read ahead sectors 0
--- Logical volume ---
LV Name /dev/vg/tmp
VG Name vg
LV UUID X2E3fi-nbe3-1jfO-zkIf-g7hs-Vv1k-dALp1U
LV Write Access read/write
LV Status NOT available
LV Size 2.00 GB
Current LE 512
Segments 1
Allocation inherit
Read ahead sectors 0
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I have this setup like this,
/boot is raid1 across sda1 sdb1 sdc1 sdd1
/swap is raid1 across sda2 sdb2 sdc2 sdd2
/ is raid5 across sda3 sdb3 sdc3 sdd3
/lvm partitions is sda4 sdb4 sdc4 sdd4
and I have no understanding of this yet.... its a work in progress... I'm just looking for clues to start... maybe someone with knowledge of lvm can recommend some reading so I can get better incite into this.
I'm going to try messing with device mapper and dmraid in the kernel tomorrow... just hopping someone can save me some trouble of doing things randomly just to figure them out instead of the right way!
Also if someone does respond can you maybe post an example of how to add more space to an lvm partition?
Or maybe give me some ideas about how to make a fileserver safe and what not.... It's a personal home fileserver... but I'm curious what a production environment would have in place for storing important information. Just little things like NFS I want that setup also... rsync server for local syncing... just post up fun projects and I will be greatly appreciative.
Thanks,
--neto 
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We built this city on swedish melodic death metal.
Last edited by net-0 on Thu Jan 03, 2008 3:40 am; edited 1 time in total |
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net-0
Tux's lil' helper
Joined: 04 Dec 2006
Posts: 103
Location: Lodi, California
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| Posted: Fri Dec 14, 2007 1:59 am Post subject: |
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And here is some more information regarding this problem I am having =)
| Code: | fileserver ~ # vgchange -a y
/dev/mapper/control: stat failed: Too many levels of symbolic links
/dev/mapper/control: mknod failed: File exists
Failure to communicate with kernel device-mapper driver.
0 logical volume(s) in volume group "vg" now active
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Not sure what I'm doing wrong.
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We built this city on swedish melodic death metal. |
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net-0
Tux's lil' helper
Joined: 04 Dec 2006
Posts: 103
Location: Lodi, California
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| Posted: Sun Dec 16, 2007 6:30 am Post subject: |
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bump?
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We built this city on swedish melodic death metal. |
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Muddy
Tux's lil' helper
Joined: 02 Jan 2003
Posts: 144
Location: U.S.
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| Posted: Sat Dec 22, 2007 1:09 am Post subject: |
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Same problem!!!!
Only...
My system has been up and running for 2 years now and working peachy until the past few weeks I have been having odd lock up problems so I thought I have tracked it down to something in xfce so I did a emerge -uvDN (and other options) for xvcf4 and other packages associated..
during the emerge X locked up again (yet the text in term kept scrolling by) so once it finished I ssh'd in and killed X restarted X and all seemed ok (and I DID NOT run etc-update, duh!) so I rebooted and now I'm getting the exact same error you are.
when I log in maint mode and try vgscan it finds the volume group fine but
vgscan --mknodes results in the same errors complaining about /dev/mapper/control: stat failed: too many levels of symbolic links etc..
the initial problem on boot is
| Code: |
*Setting up the Logical Volume Manager ...
/dev/mapper/control: stat failed: Too many levels of symbolic links
/dev/mapper/control: mknod failed: file exists
Failure to communicate with kernel device-mapper driver.
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net-0
Tux's lil' helper
Joined: 04 Dec 2006
Posts: 103
Location: Lodi, California
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| Posted: Wed Dec 26, 2007 7:16 pm Post subject: |
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Hey Muddy did you ever find a solution to this?
--neto
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We built this city on swedish melodic death metal. |
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Muddy
Tux's lil' helper
Joined: 02 Jan 2003
Posts: 144
Location: U.S.
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| Posted: Thu Jan 03, 2008 12:23 am Post subject: |
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| yes, popped in the install cd and mounted my raid 1 drives and enabled the volume groups then mounted them then chrooted in, checked the emerge log and found that I emerged device-mapper but not lvm2, so I re-emerged that and it would not even load, so I pulled it all back together with the install cd chrooted back in and upgraded to 2.6.22-r9 kernel and now it's working great again |
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net-0
Tux's lil' helper
Joined: 04 Dec 2006
Posts: 103
Location: Lodi, California
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| Posted: Thu Jan 03, 2008 3:40 am Post subject: |
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solved my problem =)
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Muddy
Tux's lil' helper
Joined: 02 Jan 2003
Posts: 144
Location: U.S.
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| Posted: Fri Jan 04, 2008 3:07 pm Post subject: |
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| also make sure to run etc-update, I found over 130 config files I had to review =( that took some time |
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Kernel & Hardware
