Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #188787

Re: Talking about RAID - disks with same id

Show all headers | View raw

On 11/08/17 13:40, deloptes wrote:
> Hi,
> I noticed recently by accident that when I read/write from the oldest raid
> disks I have - only one of the tray leds blinks. Of course the led could be
> damaged, but rather not, so looking into it I found that both disks in
> question return same UUID. So I am concerned now that I don't have any true
> RAID there and that there is very important data on those disks.
> 
> How is this possible and how to solve it - I would simply add 3rd 500MB disk
> to the raid and remove one of the others, but still what is the impact of
> this (stupid) coincidence ...
> 
> # blkid /dev/sdf
> /dev/sdf: PTUUID="13e17ac7" PTTYPE="dos"
>                    ^^^^^^^^
> # blkid /dev/sdg
> /dev/sdg: PTUUID="13e17ac7" PTTYPE="dos"

My file server had a 1.5 TB desktop drive with LUKS and btrfs, created 
with Debian 7.  When I rebuilt my SOHO network with Debian 8, all was 
well.  But, when I rebuilt my SOHO network with Debian 9, I noted 
weirdness.  I don't know if it was Debian, GNU, Linux, LUKS, btrfs, 
smbd, something on the client, PEBKAS, etc..


While trouble-shooting PEBKAS issues is important to me, I have found 
that my attempts at trouble-shooting GNU/Linux issues is usually an 
exercise in futility.  The best I can hope for is finding a way to 
reproduce the issue and filing a bug report.  But as for fixing an 
issue, my best bets is fresh software and known-good hardware.


So, for the file server issue, I built a 2 @ 1.5 TB mdadm RAID1 with 
LUKS and ext4 in another Debian 9 machine, tested it, backed up the file 
server, migrated the data, and then migrated the drives.  The weirdness 
is now gone.  :-)


We'll see what happens when I rebuild with Debian 10...


David

Back to linux.debian.user | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Talking about RAID - disks with same id deloptes <deloptes@gmail.com> - 2017-11-08 22:50 +0100
  Re: Talking about RAID - disks with same id David Christensen <dpchrist@holgerdanske.com> - 2017-11-08 23:40 +0100
    Re: Talking about RAID - disks with same id deloptes <deloptes@gmail.com> - 2017-11-09 08:20 +0100
      Re: Talking about RAID - disks with same id David Christensen <dpchrist@holgerdanske.com> - 2017-11-09 19:20 +0100
        Re: Talking about RAID - disks with same id deloptes <deloptes@gmail.com> - 2017-11-09 22:10 +0100
          Re: Talking about RAID - disks with same id David Christensen <dpchrist@holgerdanske.com> - 2017-11-09 23:50 +0100
  Re: Talking about RAID - disks with same id Tobx <net@tobx.de> - 2017-11-09 10:40 +0100
    Re: Talking about RAID - disks with same id deloptes <deloptes@gmail.com> - 2017-11-09 22:20 +0100
  Re: Talking about RAID - disks with same id Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-11-10 00:00 +0100
    Re: Talking about RAID - disks with same id deloptes <deloptes@gmail.com> - 2017-11-10 09:20 +0100
      Re: Talking about RAID - disks with same id Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-11-10 18:10 +0100
        Re: Talking about RAID - disks with same id deloptes <deloptes@gmail.com> - 2017-11-10 20:50 +0100
        Re: Talking about RAID - disks with same id Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-11-12 17:20 +0100
      Re: Talking about RAID - disks with same id David Christensen <dpchrist@holgerdanske.com> - 2017-11-10 21:10 +0100
        Re: Talking about RAID - disks with same id deloptes <deloptes@gmail.com> - 2017-11-10 23:30 +0100
      Re: Talking about RAID - disks with same id Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-11-12 17:00 +0100
        Re: Talking about RAID - disks with same id deloptes <deloptes@gmail.com> - 2017-11-12 18:00 +0100
          Re: Talking about RAID - disks with same id Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-11-12 19:50 +0100
            Re: Talking about RAID - disks with same id deloptes <deloptes@gmail.com> - 2017-11-12 20:20 +0100

csiph-web