Re: mdadm regression tests fail

[Wols Lists]

Bear in mind raid superblock v0.9 is deprecated as in "if it breaks it 
won't be fixed for you".

So I would skip this test, and if you're mentioning raid in the 
handbook, tell people they need to use one of the v1.x formats.

(NB - you can always point them at the linux raid wiki.)

Cheers,
Wol

On 05/01/2022 17:12, Randy Dunlap wrote:
> Hi.
> [adding linux-raid mailing list]
>
>
> On 1/4/22 10:55, Bruce Dubbs wrote:
> > I am trying to document the mdadm-4.2 installation procedures for our book,
> > https://www.linuxfromscratch.org/blfs/view/svn/postlfs/mdadm.html
> >
> > For testing, I am doing a simple:
> >
> >    make
> >    sudo ./test --keep-going --logdir=test-logs --save-logs
> >
> > But I get failures for about half the tests.
> >
> > Digging in a bit I just ran:
> >
> >   sudo ./test --tests=00raid0 --logdir=test-logs
> >
> > This is the first test that fails.  With some hacking, it appears that the first portion of this test that fails is:
> >
> >    mdadm -CR $md0 -e0.90 -l0 -n4 $dev0 $dev1 $dev2 $dev3
> >
> > This resolves to
> >
> >    mdadm -CR /dev/md0 -e0.90 -l0 -n4 /dev/loop0 /dev/loop1 /dev/loop2 /dev/loop3
> >
> > There is not a lot of error output in the test, so I manually ran:
> >
> >    dd if=/dev/zero of=/tmp/mdtest0 count=20000 bs=1K
> >    losetup /dev/loop0 /tmp/mdtest0
> >
> > For /dev/loop[0123]
> >
> > Then I ran
> >
> >    mdadm -CR /dev/md0 -e0.90 -l0 -n4 /dev/loop0 /dev/loop1 /dev/loop2 /dev/loop3
> >    mdadm: 0.90 metadata does not support layouts for RAID0
> >
> > My question is whether the regression tests in the tarball are valid for mdadm-4.2?
> >
> >    -- Bruce Dubbs
> >       linuxfromscratch.org
> >
> > Note: The kernel is version 5.15.12.