Re: several messages

From: Dmitry Yusupov
Date: Thu May 12 2005 - 13:34:20 EST


On Wed, 2005-05-11 at 22:16 -0400, Ming Zhang wrote:
> iscsi is scsi over ip.

correction. iSCSI today has RFC at least for two transports - TCP/IP and
iSER/RDMA(in finalized progress) with RDMA over Infiniband or RNIC. And
I think people start writing initial draft for SCTP/IP transport...

>From this perspective, iSCSI certainly more advanced and matured
comparing to NBD variations.

> usb disk is scsi over usb.
> so just a different transport.
> u are rite. ;)
>
> ming
>
> On Wed, 2005-05-11 at 23:26 +0200, Guennadi Liakhovetski wrote:
> > Hello and thanks for the replies
> >
> > On Wed, 11 May 2005, FUJITA Tomonori wrote:
> > > The iSCSI protocol simply encapsulates the SCSI protocol into the
> > > TCP/IP protocol, and carries packets over IP networks. You can handle
> > ...
> >
> > On Wed, 11 May 2005, Vladislav Bolkhovitin wrote:
> > > Actually, this is property not of iSCSI target itself, but of any SCSI target.
> > > So, we implemented it as part of our SCSI target mid-level (SCST,
> > > http://scst.sourceforge.net), therefore any target driver working over it will
> > > automatically benefit from this feature. Unfortunately, currently available
> > > only target drivers for Qlogic 2x00 cards and for poor UNH iSCSI target (that
> > > works not too reliable and only with very specific initiators). The published
> > ...
> >
> > The above confirms basically my understanding apart from one "minor"
> > confusion - I thought, that parallel to hardware solutions pure software
> > implementations were possible / being developed, like a driver, that
> > implements a SCSI LDD API on one side, and forwards packets to an IP
> > stack, say, over an ethernet card - on the initiator side. And a counter
> > part on the target side. Similarly to the USB mass-storage and storage
> > gadget drivers?
> >
> > Thanks
> > Guennadi
> > ---
> > Guennadi Liakhovetski
> >
> > -
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