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31  Hardware and U-Boot firmware / U-Boot stuff / Re: Problem with Booting the kenel from a spinning USB disk on: April 23, 2009, 02:09:33 PM
At bit more testing shows the problem to be in U-Boot, and it appears to toggle between working and not working.  I did:

reset from U-boot
stop the boot process
usb start [failed]

reset from U-boot
stop the boot process
usb start [ok]

reset from U-boot
stop the boot process
usb start [failed]

if you keep going, usb start will pass, then fail, then pass.....

So as an ugly, ugly hack.  I did this to my bootcmd

bootcmd=usb start; fatload usb 0:1 0x8000000 uImage; bootm 0x8000000; reset

That way, U-Boot will reboot itself if the usb start failed.  At least with this hack the plug will, eventually, boot itself to prompt.
32  Hardware and U-Boot firmware / U-Boot stuff / Re: Problem with Booting the kenel from a spinning USB disk on: April 22, 2009, 06:03:29 PM
I can confirm this problem as I notice it too on my plug.  It can easily go unnotice because the rebooting the plug from the command line do work but only because the kernel image was still in ram.

I don't know if this is a spin up problem with the hdd.  I did a test where I reboot from Linux and stop the boot process at uboot.  Then I wait a long time before I did "usb start" and "fatload..." and the problem is the same.  Also strangely, I don't see it if I yank the power completely.
33  General Category / Application ideas and development Q/A / Re: Home "Do Most anything" server on: April 22, 2009, 05:57:13 PM
You can absolutely power a 2.5" external harddrive from the plug.  In fact, if you look on the plug itself, on the electrical information sticker, you'll notice that it actually list the rated output of the usb at 750(?)ma @ 5v.  That should be enough for the external harddrive.

As anecdotal evidence.  I run my western digital passport 320G on the plug and it has been working fine so far.  Also, I used the kill-a-watt and the power draw difference between with and without the external hdd is about 3 watts.
34  General Category / Application ideas and development Q/A / Re: BOINC on the plug? on: April 22, 2009, 05:47:36 PM
Getting seti to work on BOINC is just:

sudo apt-get install boinc-client boinc-manager boinc-app-seti

Unfortunately no other projects have an ARM port of their app, so the only thing you can run is seti.  I have it running on my plug right now.  This is one of the things where it "works" but not very useful I don't think.
35  Linux Stuff / Linux distributions / Re: External disk enclosures on: April 22, 2009, 05:42:49 PM
I have a western digital my password 320G external HDD.  It is bus powered by the USB alone and it works just fine.  In fact, my entire filesystem (including the uImage) boots off the external HDD.

Speed is pretty good too.  I clocked it at ~27Mbytes/sec on both read and write.
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