Messages in this thread | | | Date | Thu, 30 Aug 2007 23:34:34 +0200 | From | Rene Herman <> | Subject | Re: Problems with IDE on linux 2.6.22.X |
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On 08/30/2007 11:16 PM, Greg Freemyer wrote:
> On 8/30/07, Rene Herman <rene.herman@gmail.com> wrote:
>> Well -- the world where ATA, SCSI, USB, Firewire and what have you are >> low-level drivers to a unifying storage layer is under non too obscure >> definitions sort of not non-wonderful... >> > > USB / Firewire / FC / iSCSI are all SCSI transports and fit within the > SCSI subsystem by design. > > ie. Just like ethernet, DSL, T-1, etc can all carry IP traffic with no > conceptual conflict, many media by design carry SCSI traffic. > > The PATA and SATA physical layer typically carry ATA commands and > having them tied into the SCSI stack is an aberration that I hope will > be eliminated some day. > > ATAPI is an exception. Not sure where that would end up in a perfect world.
As said, if you make a bit of an effort to view the former SCSI stack as a unified storage midlayer the abberation becomes less abberational (if that's a word).
Real SCSI, the other SCSI transports and ATAPI would just use more of the common mid-layer than P/SATA would. I'd expect the way forward would be to just refactor things until someone notices that drivers/scsi is the wrong place for sd.c and sr.c and moves them to drivers/block or whereever.
Practically, the PATA driver gives me (almost) the same throughput as the old IDE driver does, and given that I need the former SCSI stack _anyway_ for my external USB harddrive, I don't see a pressing need to carry along yet another storage stack for my harddrive.
Rene.
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