Richard P. Grant <rpg14[at]yahoo.co.uk.invalid> wrote:

> In article <1fxiitx.1fks0wr1gxlznqN%{$usenet$}[at]apple-juice.co.uk>,
> {$usenet$}[at]apple-juice.co.uk (D.M. Procida) wrote:
>
> > Richard P. Grant <rpg14[at]yahoo.co.uk.invalid> wrote:
> >
> > > Given an external FW HD, with two FW ports, is it possible/safe to mount
> > > it on two Macs simultaneously? (OS Jag.6)
> >
> > Possible, yes. Safe, no.
> >
> > Too many cooks will quite possibly ruin this particular broth.
>
> In what way 'ruin'? I want to copy some big files over; I'm not
> planning on doing simultaneous read/write.

Yikes! And just when I was beginning to trust you on the gene
manipulation thang. "Sheesh".

Why not just mount one of the machines as a target disk?

I've been wondering similar things about FireWire, like what would
happen if you made a loop:
ComputerFWport1 - FWHD1 - FWHD2 - ComputerFWport2
Would each FW port think it had two HDs connected?
Could you mount the computer as a target disk to itself?
(Obviously not, but it starts to get metaphorically metaphysical)

--
Pd

In article <1fxioaq.1cpm1km1552eqgN%pd.news[at]dsl.pipex.invalid>,
pd.news[at]dsl.pipex.invalid (PeterD) wrote:

> Yikes! And just when I was beginning to trust you on the gene
> manipulation thang. "Sheesh".

Yahbut, unlike you I ask when I don't know something.

--
Richard P. Grant | It's called a bio-assay -
0x5F9559B1 | If enough of your customers die,
www.rg-d.co.uk/ucsm/ | you know there is something wrong.
www.rg-d.com/BioLOG/ | - Adrian Tuddenham on ucsm

Richard P. Grant <rpg14[at]yahoo.co.uk.invalid> wrote:

> In article <1fxioaq.1cpm1km1552eqgN%pd.news[at]dsl.pipex.invalid>,
> pd.news[at]dsl.pipex.invalid (PeterD) wrote:
>
> > Yikes! And just when I was beginning to trust you on the gene
> > manipulation thang. "Sheesh".
>
> Yahbut, unlike you I ask when I don't know something.

oooh! Get you!

--
Pd

In article <1fxiqmc.dqdeaxdsqmpcN%pd.news[at]dsl.pipex.invalid>,
pd.news[at]dsl.pipex.invalid (PeterD) wrote:

> Richard P. Grant <rpg14[at]yahoo.co.uk.invalid> wrote:
>
> > In article <1fxioaq.1cpm1km1552eqgN%pd.news[at]dsl.pipex.invalid>,
> > pd.news[at]dsl.pipex.invalid (PeterD) wrote:
> >
> > > Yikes! And just when I was beginning to trust you on the gene
> > > manipulation thang. "Sheesh".
> >
> > Yahbut, unlike you I ask when I don't know something.
>
> oooh! Get you!

<VBG>

--
Richard P. Grant | It's called a bio-assay -
0x5F9559B1 | If enough of your customers die,
www.rg-d.co.uk/ucsm/ | you know there is something wrong.
www.rg-d.com/BioLOG/ | - Adrian Tuddenham on ucsm

> [brief warning - don't ever try anything like this with USB; it doesn't
> have the same 'safety' features as firewire; plug two computers together
> via firewire and basically nothing happens; do it with USB and you get a
> bang, some smoke, and a largish credit card bill]
>
So why doesn't this make it go bang??

http://www.apple.com/switch/howto/move2mac/

:-P
--
Jon
jon.bradbury[at]btinternet.com

In article
<1fxl0py.i052ezg8vrx7N%jon.bradburyusenetspam[at]btinternet.com>,
jon.bradburyusenetspam[at]btinternet.com (Jon B) wrote:

> > [brief warning - don't ever try anything like this with USB; it doesn't
> > have the same 'safety' features as firewire; plug two computers together
> > via firewire and basically nothing happens; do it with USB and you get a
> > bang, some smoke, and a largish credit card bill]

> So why doesn't this make it go bang??
>
> http://www.apple.com/switch/howto/move2mac/

Because it's not just a cable, there's a little box of electronics in
the middle. What you can't do is put two USB masters on the same bus,
but this device, I expect, acts as a slave each of the two USB buses.
Neither bus knows that the other exists, just that you've attached a
peripheral which generates and consumes data.

Andrew

--
--- Andrew Collier ---- To reply by email, please use:
---- http://www.intensity.org.uk/ --- 'andrew {at} intensity.org.uk'
--
r<2+ T<4* cSEL dMS hEn/CB<BL A4 S+*<++ C$++L/mP W- a-- Vh+seT+ (Cantab) 1.1.4

Andrew Collier <spambucket[at]intensity.org.uk> wrote:

> In article
> <1fxl0py.i052ezg8vrx7N%jon.bradburyusenetspam[at]btinternet.com>,
> jon.bradburyusenetspam[at]btinternet.com (Jon B) wrote:
>
> > > [brief warning - don't ever try anything like this with USB; it doesn't
> > > have the same 'safety' features as firewire; plug two computers together
> > > via firewire and basically nothing happens; do it with USB and you get a
> > > bang, some smoke, and a largish credit card bill]
>
> > So why doesn't this make it go bang??
> >
> > http://www.apple.com/switch/howto/move2mac/
>
> Because it's not just a cable, there's a little box of electronics in
> the middle. What you can't do is put two USB masters on the same bus,
> but this device, I expect, acts as a slave each of the two USB buses.
> Neither bus knows that the other exists, just that you've attached a
> peripheral which generates and consumes data.
>
> Andrew

I know it's a special cable, I intended it tongue in cheek
--
Jon
jon.bradbury[at]btinternet.com

Andrew Collier <spambucket[at]intensity.org.uk> wrote:

> In article
> <1fxl0py.i052ezg8vrx7N%jon.bradburyusenetspam[at]btinternet.com>,
> jon.bradburyusenetspam[at]btinternet.com (Jon B) wrote:
>
> > > [brief warning - don't ever try anything like this with USB; it doesn't
> > > have the same 'safety' features as firewire; plug two computers together
> > > via firewire and basically nothing happens; do it with USB and you get a
> > > bang, some smoke, and a largish credit card bill]
>
> > So why doesn't this make it go bang??
> >
> > http://www.apple.com/switch/howto/move2mac/
>
> Because it's not just a cable, there's a little box of electronics in
> the middle. What you can't do is put two USB masters on the same bus,
> but this device, I expect, acts as a slave each of the two USB buses.
> Neither bus knows that the other exists, just that you've attached a
> peripheral which generates and consumes data.

That's what I was going to say, except it would have involved magic
pixies in some way.

The warning still stands. Do *not* buy a plain cable that lets you plug
two USB computers together. If it does have a box of magic pixies in the
middle then it will (should) be fine, but some places - Maplins used to,
I think - sell plain A to A cables. Bad, evil people.

-z-


--
"I'm not sure how useful this is, but it's bloody clever."
- Jonathon Sanderson in uk.comp.sys.mac
Are you posting responses that are easy for others to follow?
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