On Fri, 8 Feb 2008, Vladislav Bolkhovitin wrote:
2. I think, everybody will agree that Linux iSCSI target should work over
some standard SCSI target framework. Hence the choice gets narrower: SCST
vs STGT. I don't think there's a way for a dedicated iSCSI target (i.e.
PyX/LIO) in the mainline, because of a lot of code duplication. Nicholas
could decide to move to either existing framework (although, frankly, I
don't think there's a possibility for in-kernel iSCSI target and user
space SCSI target framework) and if he decide to go with SCST, I'll be
glad to offer my help and support and wouldn't care if LIO-SCST eventually
replaced iSCSI-SCST. The better one should win.
why should linux as an iSCSI target be limited to passthrough to a SCSI
device.
the most common use of this sort of thing that I would see is to load up a
bunch of 1TB SATA drives in a commodity PC, run software RAID, and then
export the resulting volume to other servers via iSCSI. not a 'real' SCSI
device in sight.
David, your question surprises me a lot. From where have you decided that
SCST supports only pass-through backstorage? Does the RAM disk, which Bart
has been using for performance tests, look like a SCSI device?
I was responding to the start of item #2 that I left in the quote above.
it asn't saying that SCST didn't support that, but was stating that any
implementation of a iSCSI target should use the SCSI framework. I read
this to mean that this would only be able to access things that the SCSI
framework can access, and that would not be things like ramdisks, raid
arrays, etc.
David Lang
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