linux-kernel - Re: tools support for non-512 byte sector sizes

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Message-ID: <488F6758.8080907@redhat.com>
Date:	Tue, 29 Jul 2008 14:54:16 -0400
From:	Ric Wheeler <rwheeler@...hat.com>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>
CC:	James Bottomley <James.Bottomley@...senPartnership.com>,
	Matthew Wilcox <matthew@....cx>, linux-scsi@...r.kernel.org,
	linux-ide@...r.kernel.org, Jim Meyering <jim@...ering.net>,
	linux-kernel@...r.kernel.org, Jeff Garzik <jeff@...zik.org>,
	Matt Domsch <Matt_Domsch@...l.com>
Subject: Re: tools support for non-512 byte sector sizes

Martin K. Petersen wrote:
>>>>>> "James" == James Bottomley <James.Bottomley@...senPartnership.com> writes:
>>>>>>             
>
> James> The problem, which ata_ram also suffers, is that the tools we
> James> most need to test are the ones for manipulating non volatile
> James> characteristics (like partition tables).  We'd really like the
> James> disk contents to survive reboot for this ...
>
> Yeah, I should add that I wanted persistence too.  I went through a
> whole stack (well, 5-6 or so) fibre channel drives from various
> vendors and attempted to low-level format them to 4KB sectors.  Most
> of them laughed in my face.  One of them tried to comply and
> irreparably confused its firmware in the process.
>
> Just yesterday I received a couple of prototype drives in the mail.
> I'll ask the vendor whether they support 4KB and if so I'll give them
> a whirl.
>   
Isn't this a great use case for a SCSI target device where our target 
can be a software disk on a remote host? What is missing for us to put 
something like that together?

ric

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