> I'd been meaning pulling off all messages from a specific group
off to my
> local hard drive.
yep, that's what I want to be able to do too. Most of it will be junk,
obviously, but at least if I have it locally I only have myself to blame for
losing it :)
Using that group:xxx search string looks like just the job, should be able
to write a client to hook up to the site and pull groups to local storage
with that (and keep the threading too hopefully!). Not sure if that could be
made compatible with awhatever format stuff's held in on a news server or
not, but that'd be nice. Something to look into anyway...
cheers
Jules
--
>I think you're thinking QNX and not BeOS (BeOS requires at least 32MB
and
>200MB disk space). I know QNX can be squeezed down to that (or at least
>could at one point, not sure if it still will fit on a floppy).
Thats it. QNX even has a demo with a browser that fits on floppy.
There is also the linux kernal project, I have the LRP (router) on
a single floppy. Though for smallness there is CPM-86 and DOS.
Allison
Hi,
This was from a private email between Joe and myself - but as he says,
there's plenty of disk / Unix experts on the list that might be able to
answer this one!
We were talking about the possibility of doing a raw backup of the failing
disk in my Tek system and restoring it onto another disk to get it to
work...
> > I can
> >get a 400MB disk dump from the drive by using dd on my linux system - but
> is
> >that any use? Assuming I could even find an identical drive as a
> >replacement, even if I did something like catting the raw image to the
> new
> >disk, I'm not sure if that would give me something that would work (I'd
> >still have the filesystem corruption too, but that's a separate problem)
> >
> >Do disks as read by dd appear as a bunch of linear sectors, regardless of
> >drive parameters (heads, tracks etc.) - if that's the case then maybe I
> have
> >no problem; maybe I can even use any old drive providing it's the same
> size
> >or larger than the original disk? OK, I won't be using the full capacity
> of
> >the drive, but I don't really care :) (I have about 6 SCSI drives
> sitting
> >unused because I don't have space to put them in my main PC)
> >
> >I'm just thinking about inode tables and stuff and how they will probably
> >get screwed up trying to do any raw copying...
>
What would be ideal would be if everything's just a linear bunch of blocks
as far as dd and inode tables etc. are concerned - nice theory that I could
use a different drive to replace the failing one, but I'm sure this wouldn't
work! Anyone?
The other thing I mentioned to Joe was the filesystem check - I remember at
one point I could boot the Tek to single-user mode (throwing up a lot of
filesystem errors along the way) and then run fsck - that'd give a lot of
faults, but not correct them; any ideas how to do this? I'm fairly sure the
system wouldn't even go to single-user last time I tried though.
>From memory I managed to read all but a single block of data from the drive
in a linux system a couple of years ago (might even still have that dump
someplace) with a few retries, so if that block wasn't on something
criticial, if I can get the raw data onto another drive somehow and if I can
fix the filesystem I might be able to get a working system again (that's a
few too many ifs though!)
cheers
Jules
--
> > > > QNX is also available free, including a windowing system, networking
> > > > and a development environment. ( for non commercial users )
> > > > Jim Davis.
Free? How do I get QNX for free?
> > > Yeah, but they nickle & dime you on every single little utility that
one
> > > takes for granted with a real *nix. Want grep? It'll cost you. vi?
> > > It'll cost you.
vi? QNX used to come with ed, which was pretty good.
> If you are interested in QNX, check out http://www.qnxstart.com/. Loads of
> free software and the latest QNX news.
Okay, I did system and application programming under QNX from '88 to '93, and
found it to very robust, especially in networking and interprocess
communication. Exceptionally fault-tolerant, too. Impossible to crash the
kernal without writing code for that specific purpose. No problem running
MS-DOS applications, either.
Where can I get it "free?" Last I heard it was about $400. I didn't see
anything at qnxstart.com about a free version, but perhaps I'm blind . . .
the QNX demo includes a nice web browser and dial-up software, and, as
expected from Gordon Bell, the mini-os, browser and dial-up fit on a 1.44 MB
bootable floppy.
How do I get the "free" version?
Glen
0/0
From: Ross Archer <dogbert(a)mindless.com>
>By the way, ANSI has a standard for RF exposure limits. I don't recall
As do OSHA.
>the std. number offhand but it shows that certain frequencies are likely
to
>affect certain body parts, so it's not a simple case of more dangerous
>as the frequency goes higher (or lower.) For example, 1.2 Ghz is
>about right for heating the vitreous fluid in the eyeball, and so
exposure
>to 1.2 Ghz should always be kept away from the eyes to prevent possible
>vision damage. I think other frequencies are also bad for different
organs.
>Apparently, it's the heating effect of RF that tends to do the most
damage
>until the frequency gets quite high.
The ability of RF to penetrate the body also goes down with increasing
frequency. Also at incresing frequency the ability to focus RF power
becomes easier and the antennas more compact adding to the
the risk.
All RF should be considered with care. IT's energy radiated and if
you are in a concentrated field (IE: in front of a dish antenna) then
the risks go up as compared to a diffuse field.
Allison
On February 15, Doug Salot wrote:
> The FDA has established microwave radiation exposure levels greater than
> 5mw/cm2 to be dangerous. The cards emit max about 200mw. I don't
> remember how that drops off with distance (drops off with distance^2,
> doesn't it?).
That's correct, distance^2.
-Dave McGuire
From: Chuck McManis <cmcmanis(a)mcmanis.com>
>The new 802.11D devices like I've got operate at 2.4Ghz because
> 1) its easy to do spread spectrum there
No because it's legal there. ;)
> 2) its the same frequency as most microwave ovens so the
spectrum
> is considered 'junk.'
Nope. Microwaves are 900mhz or so. the 2.4ghz was picked for the lack
of atmospheric bending making it line of sight and also efficient
antennas very small.
>The note with the card said, "do not operate closer than 2.5" to your
skin
>for extended periods of time." No definition of 'extended' as far as I
Way lower than 2W, most are in the sub 160milliwatt range. Very low
risk save for very close to the antenna as the concentration of power
is greatest there and diminishes at the rate of square law so after a
foot
or so the power per sq/in is very low.
Allison
From: John Allain <John.Allain(a)Donnelley.InfoUSA.Com>
>Q: What Wavelengths and Wattages are known to really
> be dangerous? What is the Frequency of a Microwave
> oven, for example (900 Mhz? <g>). How much less
> dangerous is a signal of 1/2 that, etc... I have
> seen almost nothing scientific written on this subject
> and want to know more.
Microwaves run around 900mhz. That is the majik freq for
really shaking water ions till they warm up.
The key concern is the power/area* time With the threshold
around 900mhz being about 10milliwatts/square inch. The effect
is frequency sensitive where very low frequencies are less
impact then say microwave. the primary damaging effect is
heating either localized or generalized.
I've been burnt by a 20watt UHF (474mhz) twoway radio when
a bozo keyed up while I was working on the antenna. It
punched a nice hole in my finger that took a long time to heal.
cell phones FYI are in the 850mhz range and relatively low power
in the sub .5W range with a low energy density. FYI the average
HAM VHF or UHF portable is usually 2-10 times higher power
output {1 to 5W}. There is some risk, I would consider it low
by any standard I've seen.
Oh, people who drive while talking on cell phones are 4 times
more likely to be involved in an accident. That has been verified.
Allison
Anyone know what these are? Other than ugly heavy S-100 boxen? The case is
about the size of a BA11 (i.e. standard rackmount), and they have 5.25"
floppy drives and a couple 5.25" HDD's as well. Lots of ports in the back,
so I'm guessing these are some kind of multiuser systems... The processor
appears to be a V20, but I didn't look too close so don't hold me to that.
If anyone would be interested in these or boards from them, let me know
since they're going to be scrapped otherwise. They're not mine, but the guy
at one of the surplus places I go to was about to dismember them and I
figured I might as well post 'em, keep in mind that if you do want one, they
probably weigh about umm 40 pounds or so... Located in Denver, CO, 80222...
Also, they're not free, so make offers..
Doing my part to save old stuff,
Will J
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com
At 11:04 PM 2/14/01 -0800, Fred Cisin (XenoSoft) wrote:
>3) Once again, we were JOKING about that animation as:
>a) producing animation for every bit
Sorry, I didn't catch the sarcasm. While we're on the topic of
animation in OSes and apps, perhaps we should switch to the
talking, dancing paper clip.
>That still does not address why an OPERATING SYSTEM would EVER need to
>"compile code" that uses float! Certainly many aps might need float. But
>what POSSIBLE legitimate reason would there ever be for an OS to need or
>use floating point? Can anyone name any variable in an OS that should be
>float? Or are you actually saying that the FPU requirement is NOT for the
>OS at all, but that the OS is doing that for the sake of some aps?
I doubt this discussion has been heard within the halls of Microsoft
for more than a decade, so I guess it's on-topic. I see your point,
particularly from a classic standpoint... an OS is considered the
part that runs apps and manages resources, not drawing pretty pictures.
But it's like arguing that Linux isn't an OS, it's a kernel and a bunch
of GNU apps wrapped in a distribution. Win 9x doesn't really exist
without the bundle of everything else. Could it be written without
floats? As an exercise. It would be more fun to argue that DOS and
Win 9x aren't really OSes. :-)
I'm sure they didn't want to scare the bejesus out of the first
wet-behind-the-ears CS grad who attempted to use "float" in their
C program and got a link error. So where might floats be? In graphics
code, particularly sloppy graphics code. But these days the OS includes
OpenGL and DirectX, too, which have floats galore. In user-friendly
code that showed percentages for completion or resources consumed.
And then there's scads of apps like "Calc.exe", the calculator app.
>Any reason why I couldn't create a glacially slow machine running it on a
>386SX?
Uhm, it would be glacially slow? :-) And Intel / Microsoft cabal
doesn't want you to even try.
- John
