[lug] A bit confused

Sean Reifschneider jafo at tummy.com
Sat Oct 7 12:55:59 MDT 2000

On Sat, Oct 07, 2000 at 03:47:52AM -0600, Nate Duehr wrote:
>Why the limitation in Linux to two SCSI burners?  Is it something that could

It's some sort of bug...  At first we thought it was in the ide-scsi
code, but it behaves exactly the same with SCSI burners.  I'd like to
find the time to dig through the code and see if I can track anything
down, but I suspect it's going to be subtle.

>eventually be remedied with kernel code?  Do you know from experience, or is
>there a standard warning against doing it?  (I'm betting experience here...)

I've never seen it mentioned, but it definitely does not work.  I can set
up 4 burners and burn to two of them, then the other two, but if I do
3 at a time it fails.  It's not a bandwidth issue, it fails if I have
two controllers in the machine with two drives hooked to each.

>I've been wondering about the Phillips 12X IDE burners (can you tell I'm
>impatient and have big bandwidth at work?)... ever used any that run that
>fast under Linux?  I've heard that they really burn at around 10x, but

I haven't used 12 burners, we have 4 4x and 4 8x.  Mostly we're going for
less expensive drives and trying to run in parallel.  With start up and
fixating time added in, you'll probably be getting more like 7 to 8 minutes
for a full 700MB burn, instead of the 6 that a 12x rating would indicate.
But it's likely to be faster than what you'd get with a pure 10x burner
(which would have the same extra time requirements).

 "Smart...  Subtle...  And trickier than a bathtub full of jello." -- Blue
Sean Reifschneider, Inimitably Superfluous <jafo at tummy.com>
tummy.com - Linux Consulting since 1995. Qmail, KRUD, Firewalls, Python

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