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Re: Idea wanted; block disk on network (SC101T)

Steven M. Bellovin wrote:
On Tue, 12 Aug 2008 21:54:11 -0400
"Steven M. Bellovin" <> wrote:

On Wed, 13 Aug 2008 10:21:13 +0900
"Toru Nishimura" <> wrote:

Guys, who are a type of curiosity loving,

I'm toy'ing an idea to have filesys on cheap SAN devices.  The
block block is Netgear SC101T and/or Zetera NBOD.  (Yes,
I'm aware of what OS insides in them;  grab the firmware and
run strings on them).  Although the UDP-SAN wire protocol is
not disclosed (yet), Linux camp already has a working program
to use SC101 SAN as "network block device." I think it's _kool_
and want to practice the NetBSD way.  My Q is;

Q. how can I build block IO device driver "plumb'ing" UDP-SAN
data pipe?  I assume puffs/refuse would be more/less useful

Sounds like Sun's ND (Network Disk) protocol, from before NFS was
usable for the root partition...

Following up my own post -- see ndbootd(8).  You need the client, too,
but it might be a good reference.

Can we extend this to allow block transfers over tun/tap ?
That is useful to get Linux' blktap on NetBSD (and is used for Xen
to launch guests from non-plain file images).


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