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...and it's about to be implemented in Nova Scotia...

Damn Nova Scotian separatists...
 
A preview of what's to come for the O-F spaceflight news portal for the next two weeks.......

* 2 Atlas V launches in 9 days (new record)
* 2 launches from French Guiana in 11 days (new record; first one already flew today)
* 3 spacecrafts visiting the ISS in 16 days (probably new record)
* Soyuz rockets launching from all 3 launch sites (2nd time in history)
* Possible 5000th successful orbital launch in spaceflight history (may happen as early as today!)
* And of course the star of them all........Falcon 9 with legs n' The Return Of The Dragon

Bring them on! :hailprobe:
 
Windows woes

Is there a reason why Windows 7 would randomly unmount an external USB drive? I'm running my Landsat tile generation script, which is supposed to run for a few days, but in regular intervals of an hour or two, the disk unmounts and immediately remounts, killing the script. :compbash2:

The data files are now too big to copy onto the internal HDD. The same thing happens on two different USB ports. It doesn't seem connected with the PC going to sleep, or the disk powering down (it is constantly being accessed.)

It's also not a hardware problem. The same drive, on the same computer and USB port, never spontaneously dismounts with Linux.

Any ideas?
 
Whoa, that's one unusual problem here ...
How does Windows gives the feedback? Does it shows that the disk have been (un)plugged? Or is it just the script that fails when it dismounts-remounts?
 
It doesn't display an error message, but it shows the "AutoPlay" dialog, asking what to do with the disk. I haven't trawled through the system logs yet.
 
martins said:
Is there a reason why Windows 7 would randomly unmount an external USB drive? I'm running my Landsat tile generation script, which is supposed to run for a few days, but in regular intervals of an hour or two, the disk unmounts and immediately remounts, killing the script. :compbash2:

The data files are now too big to copy onto the internal HDD. The same thing happens on two different USB ports. It doesn't seem connected with the PC going to sleep, or the disk powering down (it is constantly being accessed.)

It's also not a hardware problem. The same drive, on the same computer and USB port, never spontaneously dismounts with Linux.

Any ideas?
Click to expand...

Rewrite Orbiter for Linux? :lol:

(sorry, I know not gonna happen ;))

Dumb question, but does it matter if you rewrite the script to run on Linux?

:hailprobe:
 
I don't have Windows7 but it should be similar to this.
What are the USB settings in the Control Panel→System&Maint.→Power Options→Power management plan→Change plan (Advanced)?

(This is from Windows Vista Greek, so I am not exactly sure about the translation).

Is there any chance that the USB is set to power off after an x amount of time?
 
Izack said:
Because Québec is constitutionally francophone. :P
Click to expand...

Yeah but when people usually talk about bilingualism in Canada they seem to assume Quebec speaks both English and French, it's Quebec, sure. But it's in Canada, it has to speak English, too! Right?
I would say just imagine a US state where English isn't an official language but something else is. Not going to get more basement-ish here but death by neo-con protests in 3...2...1...


Galactic Penguin SST said:
* 3 spacecrafts visiting the ISS in 16 days (probably new record)
Click to expand...

If the wikipedia list of unmanned and manned spaceflights is complete the triple arrivals within 30 days should be:

2008: STS-123 (13 March) - ATV-1 Jules Verne (3 April) - Soyuz TMA-12 (10 April): 28 days

2010: Soyuz TMA-18 (4 April) - STS-131 (7 April) - Progress M-05M (1 May): 27 days

2011 even four missions because...we can?: Kounotori 2 (27 January) - Progress M-09M (30 January) - ATV-2 Johannes Kepler (24 February) - STS-133 (26 February): 30 days for four missions, 27 days for three

2012: Soyuz TMA-05M (17 July) - Kounotori 3 (27 July) - Progress M-16M (2 August): 16 days

2012 again: SpaceX CRS-1 (10 October) - Soyuz TMA-06M (25 October) - Progress M-17M (31 October): 21 days

(Disclaimer: Everything done with Wikipedia lists and my brain which sometimes does blunders)

So it looks like it is a race if they can beat the record from 2012, which could become a close call. If the docking times on Wikipedia are correct the exact duration from the Soyuz to the Progress docking should be 15 days, 20 hours and 27 minutes.
 
BruceJohnJennerLawso said:
Dumb question, but does it matter if you rewrite the script to run on Linux?
Click to expand...
The script calls a few executables, which in turn call the DirectX DxTex.exe utility for generating the dds files. I would rather avoid having to find a linux replacement for those.

dgatsoulis said:
I don't have Windows7 but it should be similar to this.
What are the USB settings in the Control Panel→System&Maint.→Power Options→Power management plan→Change plan (Advanced)?

(This is from Windows Vista Greek, so I am not exactly sure about the translation).

Is there any chance that the USB is set to power off after an x amount of time?
Click to expand...
This did occur to me. I switched the USB settings -> USB selective suspend setting to "Disabled", to no avail. Should I check any other settings?
 
martins said:
It doesn't display an error message, but it shows the "AutoPlay" dialog, asking what to do with the disk. I haven't trawled through the system logs yet.
Click to expand...
After the "Ask-my-Dad" operation, I found out that external HDD can be underpowered, so when they're idle, they run fine (and are detected), but once the HDD "requires" more power than it is receiving, everything disconnects, the HDD returns to an idle state, then remounts.
All this can happen in a 150 to 350ms interval.

Also, this type of bug can happen when the HDD gets old and/or parts are damaged. A wrong vibration and everything goes bananas.

In both cases the situation happens when the disk is being extensively used.
Can you paste the recent event messages when a dismount occurs?
 
This did occur to me. I switched the USB settings -> USB selective suspend setting to "Disabled", to no avail. Should I check any other settings?
Click to expand...

I can't think of anything else, other than a faulty external drive.
 
I've never seen that before, but I had a similar problem where, for some strange reason, my network connection would shutdown/restart in the middle of a long operation. My solution was just to have the program prevent computer idling all together, by just moving the mouse slightly.

It seems like the "better" way to do it is set the thread execution state.
 
SolarLiner said:
After the "Ask-my-Dad" operation, I found out that external HDD can be underpowered, so when they're idle, they run fine (and are detected), but once the HDD "requires" more power than it is receiving, everything disconnects, the HDD returns to an idle state, then remounts.
All this can happen in a 150 to 350ms interval.

Also, this type of bug can happen when the HDD gets old and/or parts are damaged. A wrong vibration and everything goes bananas.

In both cases the situation happens when the disk is being extensively used.
Can you paste the recent event messages when a dismount occurs?
Click to expand...

Actually, that's a good point. It is a 2TB disk powered via the USB connector, running off a Laptop (I don't have a recent Matlab copy on my desktop), so power problems are a possibility.

I'll try from another USB drive with its own power supply (should only take me a couple of hours to copy the files over ;) )

The event logs only show a large number of this kind of error:
An error was detected on device \Device\Harddisk1\DR2 during a paging operation (EventID 51)
Click to expand...
 
martins said:
Is there a reason why Windows 7 would randomly unmount an external USB drive? I'm running my Landsat tile generation script, which is supposed to run for a few days, but in regular intervals of an hour or two, the disk unmounts and immediately remounts, killing the script. :compbash2:

The data files are now too big to copy onto the internal HDD. The same thing happens on two different USB ports. It doesn't seem connected with the PC going to sleep, or the disk powering down (it is constantly being accessed.)

It's also not a hardware problem. The same drive, on the same computer and USB port, never spontaneously dismounts with Linux.

Any ideas?
Click to expand...

of75u6qk8nvvfel6g.jpg


It has happened me that when you insert a USB (flash drive) in a few minutes will dismount. This did not happen in Linux. At first I thought it was problem of the connection (or USB slot) but yet my computer is new.

A temporary solution that helps me is (in Windows) is perform disk checks, which are found in the tools menu under "USB drive properties" window. I hope to explain well.

If I find a definitive solution, I will post on my blog and in this thread.
 
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