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Re: Talking about RAID - disks with same id

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Thank you for the kind answer. Here are my toughts

David Christensen wrote:

> Answering that question definitively would involve reviewing the source
> code of all the software and firmware on your computer for anything that
> is affected, directly or indirectly, by UUID's or PARTUUID's.
> 
> 
> You should probably start with the source code for whatever RAID
> technology you are using. (What RAID technology are you using?)
> 

Linux software raid - kernel is 4.12.10

> 
> Alternatively, look for a FAQ.
> 
> 
> STFW.  Ideally, using any warnings or error messages you are seeing.
> 
> 
>> and I should replace one of the disks. I think the Seagate
>> is >10y old.
> 
> Take a look at:
> 
> # smartctl --xall /dev/sdg
> 
> 

This is nothing spectacular - see attachment. In fact I think it does not
write to this disk at all as the partition in the raid setup shows to a
disk with same id.

I think the problem is that blkid reports the same ID for both and that
somehow RAID is using this information, rather than using some of the other
mechanisms - UUID or UDEV Maker/Model/Serial .. which can be found
under /dev/disk

> If you learn smartctl well enough, capture reports on a schedule
> (weekly?), and look for trends, you might be able to predict failure.
> STFW for information on this approach.
> 
> 
> Download the bootable CD image of Seagate Seatools and run it:
> 
> https://www.seagate.com/support/downloads/seatools/
> 

might do that, but I think the problem is in raid itself as it does not
indicate activity on the second disk and blkid reports the same id for two
disks - I really might need to look into the raid code if blkid is used in
any way.

> 
> The group consensus seems to be:
> 
> 1.  When you hear the "click of death", failure is imminent.
> 
> 2.  When you put HDD's on the shelf for long periods, they often fail
> shortly after being returned to service (e.g. within a day).
> 
> 3.  Hard disk drives last the longest if you leave them in a computer
> and powered up, even if not in use.
> 
> 4.  All drives fail eventually.  Plan on it and be prepared.
> 
> 
> I would estimate a dozen of my HDD's have failed by #1 over the years,
> and another dozen by #2.  I've got a dozen or more on the shelf that
> could end up #2.

well those are in server that virtually runs 24/7 and indeed I have replaced
many over the years. In fact most of the old disks are gone. The Seagate is
the oldest there ... the only left, so I think I'll just replace it so that
I may sleep well ... the problem is I don't know which disk is really
writing, might be the Seagate and the WD is not operational ... I think it
is best to be on the safe side :)

regards

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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

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