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Date:   Fri, 27 Apr 2018 10:01:04 +0200
From:   Martin Steigerwald <>
To:     Geert Uytterhoeven <>
Cc:     Matthew Wilcox <>,
        David Sterba <>,
        Linux FS Devel <>,
        Linux Kernel Mailing List <>,
        Jens Axboe <>,
        linux-m68k <>,
        Joanne Dow <>
Subject: Re: moving affs + RDB partition support to staging? (was: Re: Moving unmaintained filesystems to staging)

Geert Uytterhoeven - 26.04.18, 13:08:
> On Thu, Apr 26, 2018 at 12:28 PM, Martin Steigerwald
> <> wrote:
> > You probably put your stick into a cave with ancient sleeping
> > dragons 
> > 
> > Added in linux-m68k mailing list, as they likely have an opinion on
> > how to treat affs + RDB partition support. Also added in Jens Axboe
> > about patching that RDB support broken with 2 TB or larger
> > harddisks issue which had been in Linux kernel for 6 years while a
> > patch exists that to my testing back then solves the issue.
> If there are bugs in the RDB parser that people run into, they should
> be fixed.
> If there are limitations in the RDB format on large disks, that's
> still not a reason to move it to staging (hi msdos partitioning!).

What I ran into was *not* a limitation in the RDB format, but a bug in 
the Linux implementation on it. After Joanne Dow´s change the 2 TB disk 
was detected and handled properly by Linux. Also AmigaOS 4.x handles 
those disks just well and I think also AmigaOS 3.1/3.5/3.9 supported 
them, but I am not sure on the details on that, it has been a long time 
since I last booted one of my Amiga systems.

Many classic Amiga users may not deal with such large disks, but AmigaOS 
4 users probably still, and some of them may run Linux on their PowerPC 
motherboards as well.

So I think the issue is worth fixing and am looking into submitting the 
fix, which looks pretty straight-forward to me upstream unless someone 
bets me to it.


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