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31  Hardware and U-Boot firmware / Hardware / Re: Could I upgrade internal NAND flash with one extracted from USB key? on: May 26, 2009, 07:41:01 PM
There is a document from marvell detailing the specs of the platform, and I think there was a 512 limit somewhere, I am just not sure if it was on RAM, NAND or both
32  Hardware and U-Boot firmware / Hardware / Re: Could I upgrade internal NAND flash with one extracted from USB key? on: May 26, 2009, 07:22:40 PM
I think the sheevaplug is limited to 512 NAND and 512 RAM, however I am not completely sure.
33  Hardware and U-Boot firmware / Hardware / Re: EXT2 Corruption on USB Key on: May 26, 2009, 05:03:56 PM
The same happens to me and is usually due to noise in the energy source (at least thats what I suspect), make sure you have a nobreak or some clean energy source (something that is not fluctuating or below your voltage), additionally you may want to check if there is any device causing noise (lamps, motors, AC, microwave ovens, etc).
34  General Category / General Discussion / Re: Recommendable SD(HC) cards/USB sticks for the Sheevaplug on: May 26, 2009, 01:38:48 PM
for USB while I had a couple of problems, those are related to power and not the USB itself, I had luck with kingston datatraveler 101.
As of SD, I had really bad luck, the ones I've seen working are SD full size (not microSD with adapter) from SanDisk, I haven't had any luck with Kingston SD (any model)
35  General Category / Application ideas and development Q/A / Re: would be nice if it supports networking tools on: May 26, 2009, 08:12:09 AM
I only have 1 sheevaplug that currently is downloading torrents and serving a 500 gb HDD via AFP and SMB, also it has mysql, apache, mpd (music player) and mt-daap(to share via itunes). The sheevaplug is connected using a standard cat 5e ethernet cable to a 100 mbps router, I have 3 computers using the services. The speed is excellent, and if I had a gigabit ethernet router it would be even better.

If you want to build a network the sheevaplug is quite a good system to use.
36  Hardware and U-Boot firmware / Hardware / Re: Second ethernet? on: May 25, 2009, 10:23:20 PM
Nope, the internal ports are not accessible for soldering another ethernet.
37  Hardware and U-Boot firmware / Hardware / Re: Corrupt SD partition table after unplugging USB? on: May 25, 2009, 10:22:43 PM
All I can think of is that you accidentally moved the SD and it was writing, but I still find it pretty odd.
38  Hardware and U-Boot firmware / Hardware / Unstable USB on: May 25, 2009, 10:21:13 PM
As I have posted in other threads, whenever there is some kind of electrical noise my plug's usb start to fail. This has already happened with the following events:

-Turning on a lamp which is failing that crackles and blinks a lot.
-Touching the usb hub while connecting another cable.
-The microwave while cooking popcorn (the microwave is quite far from the plug, maybe 5 meters, and there are 2 walls between them)

Whenever it happens, the usb kinda resets, and my USB flasdrive is assigned a different device file, and since its my root, everything fails and I have to hard reset, pretty annoying :/
What I find interesting is that the power has failed for a split second and the plug kept working afterward like nothing happened.

I am not sure what to blame,I suspect the power, right now it is only connected to a power strip, I want to get an UPS soon, would that solve my problem?
Another suspect is plain old EM noise on the air (especially when the other devices around), but I just can't point a solution, except get the UPS.

Btw, I know that the hub is not a problem since it also happened while I was nos using it (flash drive connected directly to the plug).

Any suggestion? It's driving me crazy, since I can't get it to be more than 2 days without crashing (record is at around 1 day 20 hours).
Thanks.
39  Linux Stuff / General Linux questions / Re: Automounting on: May 25, 2009, 09:59:53 PM
Thanks for the pointers, I resolved it with udev rules. Here is how I did it:

http://plugcomputer.org/plugwiki/index.php/Udev_and_usb
40  General Category / General Discussion / Re: How do I add a new page to PlugWiki? on: May 25, 2009, 01:54:38 PM
Just type it in the url and it'll give you the option, like this:

http://plugcomputer.org/plugwiki/index.php/Omg
41  General Category / General Discussion / Re: cpuidle for a greener plug on: May 24, 2009, 10:51:34 PM
Solved it by installing powertop 1.11

This is my information:
Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 2.1%)
C0                4.1ms (40.0%)
C1               10.0ms (57.9%)
42  Linux Stuff / General Linux questions / Automounting on: May 24, 2009, 08:15:13 PM
Hi, I have a question about how linux mounts stuff, I am using gentoo, but I think the instructions should be more or less the same for all distros.
My problem is that I have 2 USB storage devices, my rootfs is in the NAND and I have several folders (usr, var, ...) in a flash drive mounted at /mnt/usb. Also, I have another HDD formated with hfsplus that hold my information.
So far everything has worked ok, every time I boot my flash drive gets /dev/sda and my hdd gets /dev/sdb, however it has happened to me that the HDD jumps to sdc, since my fstab has sda and sdb, any screw up with the letters breaks my system.

So my question is: how can I force the system to always give the same /dev entry to a device? I've looked a bit and it seems udev rules are the way to go, but I am not sure how to handle those.
The other question is: how to implement automount? I would like to have the SD mounted at /media when I plug it, or other flash drives.

Thanks.
43  General Category / General Discussion / Re: SD root filesystem flies! on: May 24, 2009, 04:09:57 PM
Every flash memory have an effect known as memory wear, were some blocks become unreadable, to avoid this problem a technique known as wear leveling was created.
Flash cards and every SD have wear leveling built-in, via an integrated controller, so you can use whatever you want (ext2 is the recommended, I am using ext3 myself because my sheeva keeps crashing from external noise), on the othr hand, mtd devices (like the NAND) are "RAW" in the sense that there is no controller performing wear leveling, so it has to be implemented by software, jffs2 and UBIFS are 2 fs that implement it.

So, short answer: you don't need jffs2 in your card, in fact you cannot use it.
44  General Category / General Discussion / Re: SD root filesystem flies! on: May 24, 2009, 03:03:02 PM
To check if you are using the SD, simply do a
cat /etc/mtab

if you see something like:

/dev/mmcblk0p1 / ext3 rw,noatime 0 0

that means you re using the SD.

to mount it you have to use:

mount /dev/mtdblock1 /mnt/nand -t jffs2

Its a good practice to mount always inside /mnt, unless needed (like mounting on /var or /usr)
Ext3 reserves around 5-10% of the total space for its own use, so its normal that you have less space available. It has nothing to do with the files.
45  General Category / Application ideas and development Q/A / Re: Internet radio on: May 24, 2009, 12:32:17 PM
libmad is loaded ,and with oss output it works just fine Smiley
Any good radio playlist ? maybe some aggregate?
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