linux-kernel - blocksize 4096 even for floppy and CDROM?

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Message-ID: <e4ab39cb-fbe7-1148-8d8a-5cd46866159f@gmx.net>
Date:   Tue, 22 Feb 2022 21:08:03 +0100
From:   JPT <j-p-t@....net>
To:     linux-kernel@...r.kernel.org
Cc:     j-p-t@....net
Subject: blocksize 4096 even for floppy and CDROM?

Hi,

sorry for bothering. I fear I need help by a block device pro ;)

I try to read several bad floppies and DVDs using safecopy.

I wonder why safecopy always says
Reported hw blocksize: 4096
Reported low level blocksize: 4096

even if the medium is floppy (512) or CDROM (2048)

is this a kernel issue always assuming min 4k block size?

Does anybody have an idea if there is a Unix out there that doesn't have
this limitation?

or which Linux version dropped support for smaller sectors?

Or is this simply safecopy's fault?

thank you very much for your help.

Jan