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From: Andy Smith <andy@strugglers.net>
To: linux-raid@vger.kernel.org
Subject: Re: RAID 6, 6 device array - all devices lost superblock
Date: Sun, 28 Aug 2022 17:11:56 +0000	[thread overview]
Message-ID: <20220828171156.56iqcps7z6hvzarp@bitfolk.com> (raw)
In-Reply-To: <CAKAPSkJLd836Zp3xU=zSOHg3qcEmi29Y2qOwWzeAFaDp+dNTvg@mail.gmail.com>

Hi Peter,

On Sat, Aug 27, 2022 at 10:00:32PM -0400, Peter Sanders wrote:
> After the hardware was replaced, my array will not assemble - mdadm
> assemble reports no RAID superblock on the devices.
> root@superior:/etc/mdadm# mdadm --assemble --scan --verbose
> mdadm: looking for devices for /dev/md/0
> mdadm: cannot open device /dev/sr0: No medium found
> mdadm: No super block found on /dev/sda (Expected magic a92b4efc, got 00000000)
> mdadm: no RAID superblock on /dev/sda
> mdadm: No super block found on /dev/sdb (Expected magic a92b4efc, got 00000000)
> mdadm: no RAID superblock on /dev/sdb

I'm wondering if this is one of those motherboards that at boot
helpfully writes a new empty GPT on any drive that it thinks doesn't
have any kind of partitioning. I say this because:

- It looks like you're using sd{a,b} etc with no partitions
- I've heard of motherboards that do this
- You say you just switched to a new motherboard

Cheers,
Andy

  parent reply	other threads:[~2022-08-28 17:24 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-28  2:00 RAID 6, 6 device array - all devices lost superblock Peter Sanders
2022-08-28  9:14 ` Wols Lists
2022-08-28  9:54   ` Wols Lists
2022-08-28 16:47     ` Phil Turmel
     [not found]       ` <CAKAPSkJAQYsec-4zzcePbkJ7Ee0=sd_QvHj4Stnyineq+T8BXw@mail.gmail.com>
2022-08-28 17:16         ` Wols Lists
2022-08-28 18:45         ` John Stoffel
2022-08-28 19:36           ` Phil Turmel
2022-08-28 19:49             ` John Stoffel
2022-08-28 23:24               ` Peter Sanders
2022-08-29 13:12                 ` Peter Sanders
2022-08-29 21:45                 ` John Stoffel
2022-08-29 22:29                   ` Eyal Lebedinsky
2022-08-29 23:53                     ` Peter Sanders
2022-08-30 13:27                       ` Peter Sanders
2022-08-30 18:03                         ` Wols Lists
2022-08-31 17:48                           ` Peter Sanders
2022-08-31 20:37                             ` John Stoffel
2022-09-02 14:56                               ` Peter Sanders
2022-09-02 18:52                                 ` Peter Sanders
2022-09-02 19:12                                   ` John Stoffel
2022-09-03  0:39                                     ` Peter Sanders
2022-09-03  5:51                                       ` Peter Sanders
2022-09-05 19:36                                         ` John Stoffel
2022-09-05 20:16                                           ` Peter Sanders
2022-09-05 19:25                                       ` John Stoffel
2022-08-28 15:10 ` John Stoffel
2022-08-28 17:11 ` Andy Smith [this message]
2022-08-28 17:22   ` Andy Smith
2022-08-28 17:34     ` Peter Sanders

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