Re: Desperately trying (this is the correct one) ... (Happy) end...


Richard Crisp
 

a word of warning

there are sort of two pricing structures for solid state disks: the "rape and pillage" model and the new model of "its gotta be competitive to sell" model

The former we are all familar with in the astro-imaging hobby: more vendors use that policy instead of the one like AP uses of providing real value for the money but I digress....

buying from the sytstem OEMs is about the most expensive way to buy any kind of storage. I think Apple was recently featured as having extraordinarily expensive DDR2 DRAM modules. Disk drives are veyr expensive from the system houses: much cheaper to buy yourself at Frys...

the Addionics method is the least expensive way I have seen to make a bootable SSD

----- Original Message -----
From: S HEGGIE
To: ap-gto@...
Sent: Thursday, December 13, 2007 4:25 PM
Subject: Re: [ap-gto] Re: Desperately trying (this is the correct one) ... (Happy) end...


This is an interesting possibility. Let's see if my laptop makes it through
the winter - I just might need to implement this sooner than expected!

Stuart

>From: Richard Crisp <rdcrisp@...>
>Reply-To: ap-gto@...
>To: ap-gto@...
>Subject: Re: [ap-gto] Re: Desperately trying (this is the correct one) ...
>(Happy) end...
>Date: Thu, 13 Dec 2007 15:21:19 -0800 (PST)
>
>again, Stuart: you can also send the data wirelessly as it comes down to go
>to another computer. but NAND flash is really cheap now. It is less than
>$5.00 a gigabyte now for the lower density drives (cards). I regularly see
>8GB drives advertised for $40 or less nowadays. That little adaptor I
>posted can take two of those giving you 16GB. that's plenty for the OS and
>your observatory software. If you need more storage locally for data, you
>can also add a USB thumb drive.
>
> also you get faster response with a NAND Flash C: drive: unless you are
>cached, you are typically disk rotational and head positioning latency
>limited
>
> you also use less power so your battery lasts longer
>
> and the computer is more immune to mechanical shock: no heads to crash,
>no bearings to freeze etc: no moving parts.
>
>
>
>S HEGGIE <stuart.j.heggie@...> wrote:
>
>That would be pretty neat (was going to pun and say "cool"). I guess we'd
>need a few gig to hold the OS and the data files generated. A good night,
>depending on the camera of course, could generate a couple of gig in data.
>
>Stuart
>
> >From: Richard Crisp <rdcrisp@...>
> >Reply-To: ap-gto@...
> >To: ap-gto@...
> >Subject: Re: [ap-gto] Re: Desperately trying (this is the correct one)
>...
> >(Happy) end...
> >Date: Thu, 13 Dec 2007 10:08:08 -0800 (PST)
> >
> >has anyone considered using either a diskless node or using a solid state
> >drive for the "cold" computer? the solid state drives are really coming
> >down in price and I did see an adaptor offered some time back that will
> >convert a USB FLASH thumb drive to a bootable ATA drive from the
> >perspective of the computer.
> >
> > it may be a way to avoid the problems that extreme cold can cause when
> >it comes to rotating media.
> >
> >
> >
> >S HEGGIE <stuart.j.heggie@...> wrote:
> >
> >Tom, I agree that the laptop strains sometimes in the cold. Up here, 100
> >miles north of Toronto, I have had to bring the laptop into the house to
> >boot it up (on really cold days) and then return it to the observatory. I
> >don't like subjecting it to those rapid temp changes you can be sure.
>Since
> >I have a manually rolled off roof, I need to go out there anyway to start
>a
> >session so it gives me the flexibility to start things off as if I'm
> >staying
> >out and when it is all up and running I return to the house and operate
>it
> >from there.
> >
> >Stuart
> >
> > >From: Tom Carrico <tom@...>
> > >Reply-To: ap-gto@...
> > >To: ap-gto@...
> > >Subject: Re: [ap-gto] Re: Desperately trying (this is the correct one)
> >...
> > >(Happy) end...
> > >Date: Thu, 13 Dec 2007 09:34:27 -0800
> > >
> > >Hi Stuart,
> > >I have used the wireless (and ethernet wired) route with a laptop local
> > >to the telescope. That has worked and my only real issue is that the
> > >screen updates are always slower than direct connecting a PC. I know I
> > >am whining a bit, as it is a minor quibble. Also, I do worry about
> > >wearing out the laptop at the telescope, as in the winter it often gets
> > >well below zero. I know I could put the laptop in a small box, but
>since
> > >my current solution does work, I have not gone any further on the
> > >wireless route. However, I do agree that it is a very good solution as
> > >it removes some of the extender and converter issues.
> > >
> > >Tom C
> > >
> > >S HEGGIE wrote:
> > > > Tom, for the trip between house and observatory, what about
>wireless?
> > >That
> > > > is what I do and it seems to work like a charm. I use a program
>called
> > > > UltraVNC. The old laptop in the observatory runs the server version
> >and
> > >the
> > > > house computer runs the client/viewer version. I use USB and
> >USB->Serial
> > > > converters to talk to my AP900GTO, SBIG camera and Robofocus. Seems
> > >stable
> > > > enough. The house is about 80 feet from the observatory. I'm running
> > > > CCDSoft5, TheSky6 and Focusmax on the laptop btw.
> > > >
> > > > Stuart
> > > >
> > > >
> > > >> From: Tom Carrico <tom@...>
> > > >> Reply-To: ap-gto@...
> > > >> To: ap-gto@...
> > > >> Subject: Re: [ap-gto] Re: Desperately trying (this is the correct
> >one)
> > >...
> > > >> (Happy) end...
> > > >> Date: Thu, 13 Dec 2007 08:43:08 -0800
> > > >>
> > > >> There are issues with USB that have bit me in this hobby. The first
> >is
> > > >> the length limitation. I image while sitting in my house and that
>is
> > >too
> > > >> far for USB, but no problem for serial (or ethernet). I have used a
> > > >> number of USB extenders and they seem to work okay if all I have
> > > >> connected at the remote end is the SBIG camera. If I also connect a
> > >USB
> > > >> to serial convertor at the remote end I occasionally get system
>hang
> > > >> ups. I have tried numerous brands of USB extenders and USB-Serial
> > > >> converters and different computers. Every single one has at least
> >once
> > > >> caused a system hang up when using a USB-serial converter, which is
> > > >> solved by removing the USB extender. Now, I have a USB extender for
> >the
> > > >> camera only and directly attach the USB-Serial converter to a port
>on
> > > >> the laptop and run long serial cables to my mount and focuser. That
> > > >> setup has never, ever hung.
> > > >> The other thing I don't like about USB is that there is no positive
> > > >> connection at the camera, it is a friction fit. Perhaps there is a
> > > >> solution for this, but I have not run across it.
> > > >> My wish would be for the astronomy community to dump USB all
>together
> > > >> and go to an ethernet solution. I am okay with serial for now, but
> > >would
> > > >> like to see all interfaces migrate to one standard..
> > > >> Tom Carrico
> > > >> http://www.ccdargo.com
> > > >>
> > > >>
> > > >> Salyer wrote:
> > > >>
> > > >>> Since almost no computer today provides a serial interface we all
> > > >>> need to use some type of serial converter. I suspect that the
> > > >>> majority of people use a USB to serial converter. If there is a
> > > >>> problem with USB (which I've never seen) then we've got the
>problem
> > > >>>
> > > >> anyway.
> > > >>
> > > >>> Greg
> > > >>>
> > > >>> At 11:13 AM 12/13/2007, you wrote:
> > > >>>
> > > >>>
> > > >>>
> > > >>>> In a message dated 12/13/2007 10:06:39 AM Central Standard Time,
> > > >>>> <mailto:rdcrisp%40sbcglobal.net>rdcrisp@... writes:
> > > >>>>
> > > >>>>
> > > >>>>
> > > >>>>> someone ought to tell microsoft, intel and the rest of the PC
> > >industry
> > > >>>>>
> > > >> as
> > > >>
> > > >>>>> well as all the camera and printer manufacturers that they have
> > >chosen
> > > >>>>>
> > > >> an
> > > >>
> > > >>>>> unreliable interface: that's the most commonly used interface on
> > > >>>>>
> > > >>>>>
> > > >>>> the planet these
> > > >>>>
> > > >>>>
> > > >>>>> days for connecting peripherals to computers.
> > > >>>>>
> > > >>>>> I am confident this will be news to them, Roland.
> > > >>>>>
> > > >>>>>
> > > >>>>>
> > > >>>> I think they are dealing with a completely different issue than
>we
> > >are.
> > > >>>>
> > > >>>> Rolando
> > > >>>>
> > > >>>>
> > > >>>
> > > >>> To UNSUBSCRIBE, or for general information on the ap-gto list
> > > >>> see http://groups.yahoo.com/group/ap-gto
> > > >>> Yahoo! Groups Links
> > > >>>
> > > >>>
> > > >>>
> > > >>>
> > > >>>
> > > >>>
> > > >>>
> > > >
> > > >
> > > >
> > > >
> > > > To UNSUBSCRIBE, or for general information on the ap-gto list
> > > > see http://groups.yahoo.com/group/ap-gto
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
> >
> >
> >
> >
> >
> >
> >
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