Bristol Digest, Vol 631, Issue 3

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Today's Topics:

1. My UUID's have changed (was LVM needs a tidy up) (Peter Hemmings)
2. Re: My UUID's have changed (Peter Hemmings)


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Message: 1
Date: Fri, 15 Jan 2016 23:03:50 +0000
From: Peter Hemmings <peternsomerset@virginmedia.com>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: [bristol] My UUID's have changed (was LVM needs a tidy up)
Message-ID: <56997AD6.6080906@virginmedia.com>
Content-Type: text/plain; charset=windows-1252; format=flowed

Update:

Found this site that was relevant (ssm was very useful)


http://wiki.networksecuritytoolkit.org/nstwiki/index.php/HowTo_Change_The_LVM_Volume_Group_Name_That_Includes_The_Root_Partition


I changed the label to better name on sda VG's and changed fstab on sdb
then updated initramfs on sdb(working fed22).

As my sda (fedora 23) still had problems with GDM and video driver, I
gave up with it and reinstalled fedora 23 on sda

With me so far!?

(Already backed up data)

I then checked everything and all is OK on sda booting fedora 23 with grub2.

I now tried to get grub to probe the other sdb partitions in particular
my old fedora 22 LVM but it will see them. On running the following
commands and looking at previous UUID's some have changed and they are
the ones I need to detect (on sdb3 sdb6 and sdb7):
[root@localhost peter]# blkid /dev/sdb1 /dev/sdb2 /dev/sdb3 /dev/sdb4
/dev/sdb5 /dev/sdb6 /dev/sdb7
/dev/sdb1: UUID="5614526C14524F5D" TYPE="ntfs" PARTUUID="23424300-01"
/dev/sdb2: UUID="eff2cfb8-1940-4bda-ac5e-b105839ce937" TYPE="ext4"
PARTUUID="23424300-02"
/dev/sdb3: UUID="bF3gFv-1aR6-Yv4U-sfYs-rvV4-TyVI-zfwE54"
TYPE="LVM2_member" PARTUUID="23424300-03"
/dev/sdb4: PTTYPE="dos" PARTUUID="23424300-04"
/dev/sdb5: UUID="89e544e1-fc6e-4c36-ba47-0f5db1bb2cb5" TYPE="ext4"
PARTUUID="23424300-05"
/dev/sdb6: UUID="pK0y9y-i09V-0iNN-sCIh-4N4n-vH3U-NQchC2"
TYPE="LVM2_member" PARTUUID="23424300-06"
/dev/sdb7: UUID="NPQ0g3-gGBS-vYRm-PmIU-F9wi-LmwU-16jFlv"
TYPE="LVM2_member" PARTUUID="23424300-07"
[root@localhost peter]#

root@localhost peter]# ls -la /dev/disk/by-uuid
total 0
drwxr-xr-x. 2 root root 320 Jan 15 21:53 .
drwxr-xr-x. 6 root root 120 Jan 15 21:53 ..
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
17de4450-297b-4777-b379-0b3db88557f7 -> ../../dm-1
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
490edcc0-c352-4c44-a06e-7bb03792fdbd -> ../../sda2
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
51b1d4a1-eedf-4d0a-8d9b-64d23289ca2c -> ../../dm-7
lrwxrwxrwx. 1 root root 10 Jan 15 21:53 5614526C14524F5D -> ../../sdb1
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
58b335b5-2c75-4531-9336-6eff8172cbc2 -> ../../sdc1
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
61d756a7-bff3-4457-83f9-62614ca02beb -> ../../dm-6
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
713b0055-85d6-43ae-9395-7efcd6614dbb -> ../../dm-3
lrwxrwxrwx. 1 root root 10 Jan 15 21:53 7C2804A6134728CD -> ../../sda1
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
7c3b1743-c510-45c6-b943-2fe58bce6f65 -> ../../dm-4
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
89b901e2-0bf8-40be-95ab-d2dfc3260ba1 -> ../../dm-2
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
89e544e1-fc6e-4c36-ba47-0f5db1bb2cb5 -> ../../sdb5
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
af6ca2ae-f165-4deb-88b6-a5b2c4f46223 -> ../../dm-5
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
bfad1c34-5821-4202-8e4e-527a6debe68f -> ../../dm-0
lrwxrwxrwx. 1 root root 10 Jan 15 21:53
eff2cfb8-1940-4bda-ac5e-b105839ce937 -> ../../sdb2

Why and how have I messed up UUID's and more importantly how can I get
back to seeing all partitions?

Regards

--
Peter H



------------------------------

Message: 2
Date: Sat, 16 Jan 2016 11:28:53 +0000
From: Peter Hemmings <peternsomerset@virginmedia.com>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] My UUID's have changed
Message-ID: <569A2975.5000903@virginmedia.com>
Content-Type: text/plain; charset=windows-1252; format=flowed

Sorted

I eventually did a windoze thing and reinstalled grub2/rescanned HW and
my box now picks up all HD's from both new fc23 grub on sda and old grub
fc22 on sdb.

All the UUID's read the same (but some had changed not sure why, but
accept it!).

I also found another fc23 on an extended partition that I did not
realize I had which was part of my problem!

Will now continue to clear out the unused rubbish on sdb and reconfigure
LVM VGs into something more manageable.

I must write 100 times "Do not be lazy when installing onto cheap disk
space"!


Regards
--
Peter H



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