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From: Peter Sanders <plsander@gmail.com>
To: Wols Lists <antlists@youngman.org.uk>
Cc: Eyal Lebedinsky <fedora@eyal.emu.id.au>, linux-raid@vger.kernel.org
Subject: Re: RAID 6, 6 device array - all devices lost superblock
Date: Wed, 31 Aug 2022 13:48:26 -0400	[thread overview]
Message-ID: <CAKAPSkKQA3cV1rcj9cNrdKorOOqyjHf_4BCLxbEx8ibusJP5nA@mail.gmail.com> (raw)
In-Reply-To: <8e994200-146e-61ce-bb4a-f7f111f47b10@youngman.org.uk>

encountering a puzzling situation.

dmsetup is failing to return.

root@superior:/mnt/backup# dmsetup status
sdg: 0 5860533168 snapshot 16/8388608000 16
sdf: 0 5860533168 snapshot 16/8388608000 16
sde: 0 5860533168 snapshot 16/8388608000 16
sdd: 0 5860533168 snapshot 16/8388608000 16
sdc: 0 5860533168 snapshot 16/8388608000 16
sdb: 0 5860533168 snapshot 16/8388608000 16

dmsetup remove sdg  runs for hours.
Canceled it, ran dmsetup ls --tree and find that sdg is not present in the list.

dmsetup status shows:
sdf: 0 5860533168 snapshot 16/8388608000 16
sde: 0 5860533168 snapshot 16/8388608000 16
sdd: 0 5860533168 snapshot 16/8388608000 16
sdc: 0 5860533168 snapshot 16/8388608000 16
sdb: 0 5860533168 snapshot 16/8388608000 16

dmsetup ls --tree
root@superior:/mnt/backup# dmsetup ls --tree
sdf (253:3)
 ├─ (7:3)
 └─ (8:80)
sde (253:1)
 ├─ (7:1)
 └─ (8:64)
sdd (253:2)
 ├─ (7:2)
 └─ (8:48)
sdc (253:0)
 ├─ (7:0)
 └─ (8:32)
sdb (253:5)
 ├─ (7:5)
 └─ (8:16)

any suggestions?



On Tue, Aug 30, 2022 at 2:03 PM Wols Lists <antlists@youngman.org.uk> wrote:
>
> On 30/08/2022 14:27, Peter Sanders wrote:
> >
> > And the victory conditions would be a mountable file system that passes a fsck?
>
> Yes. Just make sure you delve through the file system a bit and satisfy
> yourself it looks good, too ...
>
> Cheers,
> Wol

  reply	other threads:[~2022-08-31 17:48 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 [this message]
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
2022-08-28 17:22   ` Andy Smith
2022-08-28 17:34     ` Peter Sanders

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