Messages in this thread | | | Date | Wed, 11 Nov 1998 21:23:20 +0100 (CET) | From | MOLNAR Ingo <> | Subject | Re: Linux as a SCSI _Target_ device? |
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On Tue, 10 Nov 1998, Jeff Noxon wrote:
> Can anyone tell me if it would be possible to make a Linux system appear > to another system as a SCSI target? I want to RAID 5 a whole mess of > IDE drives and have it appear to another Linux box as a SCSI hard drive. > I'm guessing it would be possible with one of the Symbios chips and some > clever hacking. True/False? Where to start? > > If I need special hardware, I'm out.
i'm not sure wether such a thing exists in retail, but you also need kernel support for this. The point would be to 'export' a block device (RAID5) as an SCSI target.
i was thinking about this one yes, this way Linux could be a real hardware-RAID box. It's _not_ really complex, but i havent seen this yet. The board has to do something like this:
- send an IRQ if an SCSI command arrives - should be able to DMA out to the SCSI bus and also accept DMA transfers.
probably there are some RT considerations (Linux has to react within a given timeframe), but maybe not, and Linux can sure can do much better than the millisec-timescale of RAID arrays. It is an interesting project. True 50-500G hardware-RAID for $5K or so.
-- mingo
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