Re: Recover data from damage disk in "array"

["Hérikz Nawarro" <herikz.nawarro@gmail.com>]

> I'm not sure what you mean by isolate, or what's meant by recover all
> data. To recover all data on all four disks suggests replicating all
> of it to another file system - i.e. backup, rsync, snapshot(s) +
> send/receive.

I mean, dd the disk to a file and copy the data, before replacing the
broken disk.

> Are there any kernel messages reporting btrfs problems with this file
> system? That should be resolved as a priority before anything else.

No, the fs is fine and i stopped using it when the disk port broke.

> Also, DUP metadata for multiple device btrfs is suboptimal. It's a
> single point of failure. I suggest converting to raid1 metadata so the
> file system can correct for drive specific problems/bugs by getting a
> good copy from another drive. If it's the case DUP metadata is on the
> drive with the bad sata cable, that could easily result in loss or
> corruption of both copies of metadata and the whole file system can
> implode.

I'll try to convert the whole fs as soon as I get a new disk for replacement.

Em sáb., 23 de jan. de 2021 às 03:29, Chris Murphy
<lists@colorremedies.com> escreveu:
>
> On Mon, Jan 18, 2021 at 5:02 PM Hérikz Nawarro <herikz.nawarro@gmail.com> wrote:
> >
> > Hello everyone,
> >
> > I got an array of 4 disks with btrfs configured with data single and
> > metadata dup, one disk of this array was plugged with a bad sata cable
> > that broke the plastic part of the data port (the pins still intact),
> > i still can read the disk with an adapter, but there's a way to
> > "isolate" this disk, recover all data and later replace the fault disk
> > in the array with a new one?
>
> I'm not sure what you mean by isolate, or what's meant by recover all
> data. To recover all data on all four disks suggests replicating all
> of it to another file system - i.e. backup, rsync, snapshot(s) +
> send/receive.
>
> Are there any kernel messages reporting btrfs problems with this file
> system? That should be resolved as a priority before anything else.
>
> Also, DUP metadata for multiple device btrfs is suboptimal. It's a
> single point of failure. I suggest converting to raid1 metadata so the
> file system can correct for drive specific problems/bugs by getting a
> good copy from another drive. If it's the case DUP metadata is on the
> drive with the bad sata cable, that could easily result in loss or
> corruption of both copies of metadata and the whole file system can
> implode.
>
> --
> Chris Murphy