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SubjectRe: tools support for non-512 byte sector sizes
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On Tue, 29 Jul 2008 13:56:14 -0500
James Bottomley <James.Bottomley@HansenPartnership.com> wrote:

> On Tue, 2008-07-29 at 14:54 -0400, Ric Wheeler wrote:
> > Martin K. Petersen wrote:
> > >>>>>> "James" == James Bottomley <James.Bottomley@HansenPartnership.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?
>
> Technically nothing. Tomo should already have one for the STGT test
> infrastructure (I've cc'd him).

Yeah, stgt also enables you to use a software media changer and a
software DVD drive (and we are working on VTL).

http://stgt.berlios.de/

You can connect to a remote host with iSCSI. FCoE might work since
Mike Christie has used stgt to work on the FCoE initiator driver.

stgt doesn't support non-512 byte sector sizes now but I'll add the
support shortly. I want to try DIF with iSCSI and FCoE.


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