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

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Message-ID: <yq1fsoab5n0.fsf@ca-mkp.ca.oracle.com>
Date:   Tue, 22 Feb 2022 23:00:07 -0500
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     JPT <j-p-t@....net>, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org
Subject: Re: blocksize 4096 even for floppy and CDROM?


Randy,

>> 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?

Not sure how safecopy queries the block size. The kernel supports
devices with 512, 1024, 2048, and 4096-byte logical blocks.

-- 
Martin K. Petersen	Oracle Linux Engineering