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Re: [linux-lvm] LVM Problems :)



Greetings again,

Yes, of course it was not a rogue lvm ;)
Fun is a must, eh?

Anyway,
Here is my recipe of shrinking the lvm.
I hope i got it right, now with the e2fsadm thingy:

1. unmount it
2. e2fsadm -L-(SIZE)G /dev/share/data
3. pvmove /dev/(HDD)
4. vgchange -a n ; vgchange -x y
5. vgreduce share /dev/(HDD)
6. vgchange -x n ; vgchange -a y
7. fdisk /dev/(HDD)
8. mkfs.ext2 auf /dev/(HDD)
9. Copy files to reduce data amount on LVM
10. repeat

Or am i missing anything? :)
If not, i will spent some hours of GREAT FUN
shrinking it. Ahh, the fsck's, movings and.. :)

-Christian.
BTW: Awesome support! :)




Heinz Mauelshagen wrote:
On Fri, Feb 13, 2004 at 06:06:59PM +0100, Christian Reiss wrote:

Greetings again,

Curious, I replied, but did not recive a copy of my reply,
maybe it got lost in the internet? :) Killed by a rogue lvm,
I assume ;) - If this was/is only me missing my reply, then
I am deeply sorry for spamming - not intentionally, really.


Christian,

as long as you agree that it wasn't LVM it is no problem ;-)


---

Hi there!

Big thanks for the very fast answer!!
Much appreciated!

Just to be VERY sure, tune2fs -l says:


<SNIP>


Block count: 250576896

<SNIP>


Block size: 4096

<SNIP>


So What lvreduce size should i use to shrink it?
I better have a guru look over it, better safe than
sorry


250576896 * 4KB / 1024MB/KB= 978816MB (which is a multiple of 32MB)

->

# lvreduce -L 978816M /dev/share/data

That should free 112640MB or 3520 PEs in your VG.


BTW: you should either run e2fsadm to grow/shrink the unmounted filesystem _and_ the logical volume in one go -or- use the filesystem resizer and lvextend/lvreduce in the correct order (lvextend + grow fs -or- shrink fs + lvreduce).

Problem with the later is getting the size arguments right ;-)


Regards, Heinz -- The LVM Guy --




-Christian.

Heinz Mauelshagen wrote:


Christian,

the size of your filesystem and logical volume differs already.
That's why e2fsadm fails.
Did you eventually run resize2fs in order to shrink the filesystem ?

Your logical volume size is 1091456MB (32MB/PE * 34108 PE) but your
filesystem size is 963584GB (941GB * 1024MB/GB; check with
"tune2fs -l" and look for the block count and block size to calculate
this correctly).

In case the result shows, that your filesystem is already smaller

than the LV,


lvreduce the logical volume appropriately.

Use the block count * block size result and round it up to the next PE!

Regards,
Heinz    -- The LVM Guy --




On Fri, Feb 13, 2004 at 03:06:28PM +0100, Christian Reiss wrote:



Greetings!

I am trying to dissolve a running LVM, so i am doing
the e2fsadm, lvreduce, pvmove thingy. But ever since I
removed the first hdd, I am unable to resize the lvm
any more. The error can be seen below, with e2fsadm.
I also included the vg&lvdisplay commands.

I am running the LVM1 sources (non-cvs, approx mid last
year), as i am unable to run LVM2 (need to downgrade kernel
to 2.4.22 (no patch included in lvm2 for 2.4.23)).
Also, I am (too dumb/unable) to locate a e2fsadm alike
tool for lvm2, as e2fsadm needs the lvm-tab thingy,
which lvm2 no longer provides.

Any help is greatly appreciated.

-Christian.


:::::::::::::::::: ::: vgdisplay ::::

--- Volume group ---
VG Name               share
VG Access             read/write
VG Status             available/NOT resizable
VG #                  0
MAX LV                256
Cur LV                1
Open LV               1
MAX LV Size           2 TB
Max PV                256
Cur PV                11
Act PV                11
VG Size               1.12 TB
PE Size               32 MB
Total PE              36668
Alloc PE / Size       34108 / 1.04 TB
Free  PE / Size       2560 / 80 GB
VG UUID               PSYbaQ-bl8d-xvHp-6re2-hoKd-9mE5-Wa5Tqz

:::::::::::::::
:: lvdisplay ::

--- Logical volume ---
LV Name                /dev/share/data
VG Name                share
LV Write Access        read/write
LV Status              available
LV #                   1
# open                 1
LV Size                1.04 TB
Current LE             34108
Allocated LE           34108
Allocation             next free
Read ahead sectors     1024
Block device           58:0

:::::::::::::
:: e2fsadm ::

e2fsadm -L-10G /dev/share/data
e2fsadm -- logical volume size for "/dev/share/data" invalid

:::::::::::
:: df -h ::

Filesystem            Size  Used Avail Use% Mounted on
/dev/share/data       941G  910G   32G  97% /share/filebase


-- Christian Reiss <email demonlord de> demonserver.de

Key fingerprint = 2999 B7CD A218 06DF D658  5BE3 18B6 B232 02FF 71B2
Public Key can be obtained here: http://www.demonlord.de/pgp.txt



*** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them ***



=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-


Heinz Mauelshagen                                 Red Hat, Inc.
Consulting Development Engineer                   Am Sonnenhang 11
                                                 56242 Marienrachdorf
                                                 Germany
Mauelshagen RedHat com                            +49 2626 141200
                                                      FAX 924446


=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-


_______________________________________________
linux-lvm mailing list
linux-lvm redhat com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/


--
Christian Reiss <email demonlord de>
demonserver.de

Key fingerprint = 2999 B7CD A218 06DF D658  5BE3 18B6 B232 02FF 71B2
Public Key can be obtained here: http://www.demonlord.de/pgp.txt


*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Heinz Mauelshagen                                 Red Hat, Inc.
Consulting Development Engineer                   Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen RedHat com                            +49 2626 141200
                                                       FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

_______________________________________________
linux-lvm mailing list
linux-lvm redhat com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/


--
Christian Reiss <email demonlord de>
demonserver.de

Key fingerprint = 2999 B7CD A218 06DF D658  5BE3 18B6 B232 02FF 71B2
Public Key can be obtained here: http://www.demonlord.de/pgp.txt

Attachment: pgp00007.pgp
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