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Groups > linux.debian.user > #233353

Re: mdadm and whole disk array members

From Gary Dale <gary@extremeground.com>
Newsgroups linux.debian.user
Subject Re: mdadm and whole disk array members
Date 2021-03-23 00:50 +0100
Message-ID <BVCt4-Sz-5@gated-at.bofh.it> (permalink)
References <BVBdE-d4-7@gated-at.bofh.it> <BVBGH-nf-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 2021-03-22 18:49, Andy Smith wrote:
> Hi Gary,
>
> On Mon, Mar 22, 2021 at 06:20:56PM -0400, Gary Dale wrote:
>> I suggest that, since it appears the developers can't get this work
>> reliably, that the option to use the whole disk be removed and mdadm insist
>> on using partitions. At the very least, mdadm --create should issue a
>> warning that using a whole device instead of a partition may create
>> problems.
> I've been using whole disks in mdadm arrays for more than 15 years
> across many many servers on Debian stable and have never experienced
> what you describe. There must be something else at play here.
>
> I suggest you post a detailed description of your problem to the
> linux-raid mailing list and hopefully someone can help debug it.
>
>      https://raid.wiki.kernel.org/index.php/Linux_Raid#Mailing_list
>
> Cheers,
> Andy
>
It's not just me but a lot of other people have been having the same 
problem. It's been reported many times as I discovered after trying to 
use whole disks. Moreover, the fixes that I'd used in the past don't 
seem to work reliably without partitions.

There doesn't seem to be a downside to using partitions considering that 
partition tables have never taken up any significant amount of space. It 
was an interesting experiment / learning experience but I've decided 
that it's not worth going further so I'm going back to using disks with 
a single partition.

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Thread

mdadm and whole disk array members Gary Dale <gary@extremeground.com> - 2021-03-22 23:30 +0100
  Re: mdadm and whole disk array members Andy Smith <andy@strugglers.net> - 2021-03-23 00:00 +0100
    Re: mdadm and whole disk array members Gary Dale <gary@extremeground.com> - 2021-03-23 00:50 +0100
      Re: mdadm and whole disk array members deloptes <deloptes@gmail.com> - 2021-03-23 13:40 +0100
        Re: mdadm and whole disk array members deloptes <deloptes@gmail.com> - 2021-03-23 13:50 +0100
          Re: mdadm and whole disk array members Reco <recoverym4n@enotuniq.net> - 2021-03-23 16:50 +0100
            Re: mdadm and whole disk array members Gary Dale <gary@extremeground.com> - 2021-03-26 02:30 +0100
              Re: mdadm and whole disk array members Felix Miata <mrmazda@earthlink.net> - 2021-03-26 05:10 +0100
                Re: mdadm and whole disk array members Gary Dale <gary@extremeground.com> - 2021-03-26 19:10 +0100
              Re: mdadm and whole disk array members deloptes <deloptes@gmail.com> - 2021-03-26 08:00 +0100
                Re: mdadm and whole disk array members Gary Dale <gary@extremeground.com> - 2021-03-26 19:20 +0100
          Re: mdadm and whole disk array members Gary Dale <gary@extremeground.com> - 2021-03-26 02:20 +0100
            Re: mdadm and whole disk array members Gary Dale <gary@extremeground.com> - 2021-03-26 02:30 +0100
        Re: mdadm and whole disk array members Gary Dale <gary@extremeground.com> - 2021-03-26 02:20 +0100
  Re: mdadm and whole disk array members Andy Smith <andy@strugglers.net> - 2021-03-26 17:30 +0100
    Re: mdadm and whole disk array members Gary Dale <gary@extremeground.com> - 2021-03-26 19:40 +0100
      Re: mdadm and whole disk array members Andy Smith <andy@strugglers.net> - 2021-03-26 22:00 +0100

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