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From:   Michael Schmitz <schmitzmic@gmail.com>
Date:   Tue, 26 Jun 2018 14:23:16 +1200
Message-ID: <CAOmrzk+CuuraUnWWKDKen9FV6=UcgKgc6+qJ3g-Fx+tkt5HHQw@mail.gmail.com>
Subject: Re: moving affs + RDB partition support to staging?
To:     jdow <jdow@earthlink.net>
Cc:     Martin Steigerwald <martin@lichtvoll.de>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Matthew Wilcox <willy@infradead.org>,
        David Sterba <dsterba@suse.cz>,
        Linux FS Devel <linux-fsdevel@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Jens Axboe <axboe@kernel.dk>,
        linux-m68k <linux-m68k@lists.linux-m68k.org>
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Joanne,

Martin's boot log (including your patch) says:

Jun 19 21:19:09 merkaba kernel: [ 7891.843284]  sdb: RDSK (512) sdb1
(LNX^@)(res 2 spb 1) sdb2 (JXF^D)(res 2 spb 1) sdb3 (DOS^C)(res 2 spb
4)
Jun 19 21:19:09 merkaba kernel: [ 7891.844055] sd 7:0:0:0: [sdb]
Attached SCSI disk

so it's indeed a case of self inflicted damage (RDSK (512) means 512
byte blocks) and can be worked around by using a different block size.

Your memory serves right indeed - blocksize is in 512 bytes units.
I'll still submit a patch to Jens anyway as this may bite others yet.

Cheers,

  Michael


On Sun, Jun 24, 2018 at 11:40 PM, jdow <jdow@earthlink.net> wrote:
> BTW - anybody who uses 512 byte blocks with an Amiga file system is a fam=
n
> dool.
>
> If memory serves the RDBs think in blocks rather than bytes so it should
> work up to 2 gigablocks whatever your block size is. 512 blocks is
> 2199023255552 bytes. But that wastes just a WHOLE LOT of disk in block ma=
ps.
> Go up to 4096 or 8192. The latter is 35 TB.
>
> {^_^}
> On 20180624 02:06, Martin Steigerwald wrote:
>>
>> Hi.
>>
>> Michael Schmitz - 27.04.18, 04:11:
>>>
>>> test results at https://bugzilla.kernel.org/show_bug.cgi?id=3D43511
>>> indicate the RDB parser bug is fixed by the patch given there, so if
>>> Martin now submits the patch, all should be well?
>>
>>
>> Ok, better be honest than having anyone waiting for it:
>>
>> I do not care enough about this, in order to motivate myself preparing
>> the a patch from Joanne Dow=C2=B4s fix.
>>
>> I am not even using my Amiga boxes anymore, not even the Sam440ep which
>> I still have in my apartment.
>>
>> So RDB support in Linux it remains broken for disks larger 2 TB, unless
>> someone else does.
>>
>> Thanks.
>>
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