Linux-kernel mailing list archive 2000-23,: Re: ULTRA ATA/100 announced

# Re: ULTRA ATA/100 announced

willy@thepuffingroup.com
Tue, 6 Jun 2000 16:21:06 -0400

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On Tue, Jun 06, 2000 at 03:32:18PM +0200, scoetzee@voltex.co.za wrote:
> this is fine, as you can always add more controllers, but theoretically (never
> tried myself)
> you can attach 32 SCSI 3 devices to a scsi3 bus.

but i've never understood _why_. if you read the docs from, say, SGI,
they recommend not putting more than 4 drives on a chain as they will have
completely saturated the bandwidth. if your devices aren't high-enough
bandwidth to saturate the bus, then why not put them on a cheaper bus
with more controllers (like, er, IDE).

ok, you might argue that you only have N slots in your machine --
there are some pretty nice quad-tulip cards available, i don't see why
people shouldn't make quad-IDE controllers (2 busses per controller =>
16 devices.)

    --
    The Sex Pistols were revolutionaries.  The Bay City Rollers weren't.

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