Re: Big-endian RAID5 recovery problem

[Roman Mamedov <rm@romanrm.net>]

On Mon, 01 May 2017 16:39:07 -0500
Adam Thompson <athompso@athompso.net> wrote:

> I can't find any modern big-endian Linux systems... looks like all the 
> ARM distros run in little-endian mode.

Here are QEMU images for debian-mips (should be big-endian, as opposed to
debian-mipsel): https://people.debian.org/~aurel32/qemu/mips/

Of course it will run purely in software, but most likely more than fast enough
to copy away the data.

Not entirely sure that particular emulated MIPS system support more than 4
drives), but it appears that a starting point could be (man qemu-system):

           Instead of -hda, -hdb, -hdc, -hdd, you can use:

                   qemu-system-i386 -drive file=file,index=0,media=disk
                   qemu-system-i386 -drive file=file,index=1,media=disk
                   qemu-system-i386 -drive file=file,index=2,media=disk
                   qemu-system-i386 -drive file=file,index=3,media=disk

with indexes 0..5, as you need the boot disk, all 4 drives, and one more as
the backup destination.

May or may not be the best way, but IMO beats trying to hex-edit the
superblock right away.

-- 
With respect,
Roman