[S] Systemd device dev-disk-by\{stuff} appeared twice with sysfs diff

nstgc · 2015-07-04 20:14:53

I was on the btrfs gotcha page and came across something that may be related.

Do not make a block-level copy of a btrfs filesystem to a block device, and then try to mount either the original or the copy while both are visible to the same kernel.
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This problem is due to the UUID on the original and the copy being the same. This confuses the kernel, and it can end up writing updates to the wrong filesystem, causing massive data corruption.

severach · 2015-07-05 04:09:46

That looks like a different problem. Copying GPT partitions with sgdisk creates a duplicate by-partlabel or by-partuuid. zfs and btrfs copy the contents whatever way they want. Copying an entire disk including contents will bypass btrfs internal management of by-uuid and create duplicates.

nstgc · 2015-07-05 21:03:13

I'm just throwing it out there. Yeah, I agree that is it's own issue, but there is a bit of similarity there. Where there is similarity, there is reason to consider it.

I'm not changing this from solved, nor am I worried. Still. Something to think about.

joksnet · 2016-03-21 03:43:03

The problem is with the partlabel, not the label:

% lsblk -o NAME,PARTLABEL
NAME     PARTLABEL
sda      
├─sda1   Linux filesystem
├─sda2   Linux filesystem
├─sda3   Linux /home
│ └─home 
└─sda4   Linux swap

I used `cgdisk` option `m` as @paneless suggested.

Scimmia · 2016-03-21 03:51:51

joksnet, you've been here long enough to know not to necrobump, especially a solved thread.

jasonwryan · 2016-03-21 05:38:40

Closing.

Arch Linux

#26 2015-07-04 20:14:53

Re: [S] Systemd device dev-disk-by\{stuff} appeared twice with sysfs diff

#27 2015-07-05 04:09:46

Re: [S] Systemd device dev-disk-by\{stuff} appeared twice with sysfs diff

#28 2015-07-05 21:03:13

Re: [S] Systemd device dev-disk-by\{stuff} appeared twice with sysfs diff

#29 2016-03-21 03:43:03

Re: [S] Systemd device dev-disk-by\{stuff} appeared twice with sysfs diff

#30 2016-03-21 03:51:51

Re: [S] Systemd device dev-disk-by\{stuff} appeared twice with sysfs diff

#31 2016-03-21 05:38:40

Re: [S] Systemd device dev-disk-by\{stuff} appeared twice with sysfs diff

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