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1  Hardware and U-Boot firmware / U-Boot stuff / Re: Guru server plus bricked uboot installer won't work on: August 19, 2010, 08:39:24 PM
God is a very humerous man...

my plug's been stuck in its current state for a week with that same problem. just now i poked the jtag wires with a small screw driver, re-ran the installer and it installed ok and my plug is no longer a brick... just after i posted my last post.

-- update: interestingly, if my plug is sitting on its feet, it fails. If my plug is sitting on its side (with the sd card side down) it works... thats just not a good thing really, definitely sounds like a wire contact issue though.
2  Hardware and U-Boot firmware / U-Boot stuff / Re: Guru server plus bricked uboot installer won't work on: August 19, 2010, 08:34:27 PM
yeah, i've tried various combinations of things to get it to flash... including timing related stuff and various different machines with no real success.

Either my plug is bricked or the jtag board is bricked. I dont get anything at all on the serial console though (though i used to and the installer used to work).

I suspect my plug is most definitely toast, or the flimsy little wires connecting the jtag board to the plug are broke in some way.
3  Hardware and U-Boot firmware / U-Boot stuff / Re: Guru server plus bricked uboot installer won't work on: August 18, 2010, 04:27:38 PM
Not that it helps, i know, but im stuck with the exact same problem....
4  General Category / General Discussion / anyone doing any benchmarking (guruplug server plus)? on: May 16, 2010, 08:17:06 AM
Just curious if anyone is doing much in the way of benchmarking on the guruplugs yet?

im keen to see what kind of speed can be thrown thru the esata interface as well how quick it can push data between the two network interfaces (specially with something like iptables running).

This is all i've bothered doing so far, but its a seagate momentus 500g 2.5" drive. Seems quick enough.
sheevaplug-debian:~# dd if=/dev/sda of=/dev/null bs=512k count=2048
2048+0 records in
2048+0 records out
1073741824 bytes (1.1 GB) copied, 12.6829 s, 84.7 MB/s

Quite interested to see how that translates into performance with iscsi or nfs/cifs.
5  Hardware and U-Boot firmware / Hardware / Re: guruplug server plus arrived... but jtag board doco anywhere? on: May 16, 2010, 08:08:22 AM
my computer was setup for the original sheevaplug, and the drivers for the jtag board seem to be identical (i.e. the wiki link for how to setup the normal ftdi drivers should work unless im very much mistaken)...

@two9er, thanks for the info... I remember reading the quick start guide, but thats a different one, very usefull that one too...

I get some strange behaviour with the jtag board though, like when i plug something into the esata port, the jtag board seems to reset itself somehow and i loose the connection (which then comes up on /dev/ttyUSB1). Impressed with the disk speed on the esata interface though, quite decent indeed...  still i've only really just plugged it all back up again so im quite keen to do some real testing on the speed side for the interface (like seeing how fast this thing could route traffic between the two gig interfaces).
6  Hardware and U-Boot firmware / Hardware / guruplug server plus arrived... but jtag board doco anywhere? on: May 14, 2010, 09:55:35 AM
My guruplug sat in a state of "pending tracking number from fedex" for about a week and then i prodded globalscale, it went straight to shipping state and it appeared on my desk 2 days later (wow that was quick us to au). Fairly impressed with that.

However, i ordered mine some time ago so i got a jtag board with it and i can find very little about the actual board itself. The things got like a thousand plugs in it and ships with two very flimsy cables (i really hate the types of connectors they used, they typically last about 5 insertions before they die in my experience). But im curious about whether i need to plug in both those cables just to get to the serial console? and generally interested in what all the other bits and pieces on it do? Im not sure if i missed a post somewhere about them, but i've been thru the forums, the wiki etc and i cant find much about the jtag board except what it provides for the plug. I've looked at the schematics, but its not really all that useful.

7  Hardware and U-Boot firmware / Hardware / Re: guruplug server plus arrived but died on: May 12, 2010, 11:59:22 PM
I had the same issue... mines (currently) going into a juniper switch, it lives about 5 minutes before the whole box rolls over and dies... similar problem when i hooked up esata as well...

im wondering if anyone else who's seeing this is plugged into 240v (au)? cause mines getting fantastically hot...
8  General Category / General Discussion / Re: GuruPlug-Server is available? on: February 15, 2010, 10:04:11 AM
interesting you should mention that, cause I was thinking the same thing..

From my experience with the sheeva plug, i'd be happy if they dropped the nand to around 64g and upped the memory. Im tending not to use the nand for an OS and am just storing kernel/initrd combo's on it (then using those to boot usb or mmc)... mostly cause the uboot sd/usb support i've been having tonnes of trouble with, but so long as you can get to an initrd the linux kernel has no problems addressing sd/usb storage.
9  Hardware and U-Boot firmware / U-Boot stuff / Re: U-Boot can't read USB HDD partition table on: February 09, 2010, 06:45:54 AM
I have the same issue and i've yet to solve it... putting reset in for me just sends the plug into an infinite loop cause it'll never see the drive again unless the thing is powered off and on again. I've tried many different storage configs, and recently upgraded to 3.4.27 uboot to no avail... So far the only solution i've been able to find is to put the kernel/initrd into nand, then once the kernel has booted it can see the usb storage but i'd like to keep the internal storage for a functional 9.04 ubuntu as a bit of a fail safe.

The different storage i've tried:
1) A Lacie 160gb usb-powered 2.5" drive - internally its a western digital 5400rpm ide drive (the one im keen to actually get working)
2) Several 3.5" (mostly seagate) ida and sata drives connected via different storage cases (all mains powered)
3) about 5 different thumb drives of different sizes and types
4) several sd cards plugged up via a two different usb/sd converter (1gb sandisk microsd, 2gb sandisk microsd, 8gb toshiba class 4 sdhc, 8gb kingston class 4 sdhc, 16gb kingston microsd class 2).
5) a seagate 3.5" freeagent 1tb drive (mains powered)

im beginning to wonder if my plug may have a bit of a hardware fault somewhere.
10  General Category / General Discussion / Re: GuruPlug-Server is available? on: February 02, 2010, 08:21:00 AM
As for what I'd like faster...
I'd like the Web UI for my squeezebox server to run much faster.
I'd like CPU utilization to be lower when doing rsyncs
I'd like my squeezebox server re-scans to be faster
I'd like my NAS copies to be faster
I know it will not guarantee all of these, but it will definitely help the Web UI. Don't get me wrong - I love my Sheevaplug. I'm just not going to pay for an upgrade unless I can get a faster CPU in there too! Although, the eSata is tempting...

I think you'll find alot of that may actually happen with an esata interface... eSata can be a bit of a tricky interface, but its faster and kinder on the cpu. From my limited playing with esata (i've never bothered benchmarking, and there are alot of factors involved, so take this with a grain of salt), the esata interface is not only faster for transfer and a fair bit less cpu intense, but its also got a bit lower latency. Alot of the things you mention above are going to be impacted more by io wait (or io processing done on the cpu because its usb) rather then cpu speed as such (especially the rsync).

Though personally, i'd wait for some useful benchmarks of the guruplug.
11  General Category / General Discussion / Re: GuruPlug-Server is available? on: January 30, 2010, 09:16:43 AM
Theres some interesting stuff coming out in the arm space now... but that guru plug actually looks pretty nifty (for a hacker-type), makes me wish there were more manufactures doing the same (producing hacker-friendly equipment). Though in a way its probably a good thing their not cause i'd be much poorer for the experience.

That guruplug server plus though is pretty impressive connectivity wise, 2xgb eths, usb, esata, usnap, wifi, and bluetooth. All for only 30$ more then the original sheeva plug. That really does expand the possibilities incredibly.
12  Hardware and U-Boot firmware / Hardware / Re: Enabling Esata on V1.3 Sheeva Plug - Progress Report. on: January 19, 2010, 10:03:36 PM


If you  go to:- http://www.plugcomputer.org/index.php/us/resources/downloads?func=fileinfo&id=56

You will find an 11 page pdf entitled  Sheeva-PowerPlug-V1.3-GTI-090906

Use this to determine the values of the unpopulated components.

There are 4 series caps that go in the data feed to / from the esata connector

There  are 4 caps and a ferrite inductor that produce a pi filter to provide 3.3v to the sata part of the Marvell SOC.

The Sheevaplug has an adequate silk screen which will point you where the components have to go.

This has been discussed before in this tread, I would suggest you read it carefully!  There are even part numbers for the esata connector here.
Be warned.. These components are mainly 0402 caps,  the size of a grain of salt. They are NOT easy to solder.



Yeah, I did see the parts list and even the connectors that need soldering (think its all on first page), but theres nothing there that says c164 is a component x... The PDF is exactly what I needed, thanks for that.

Regards, Paul
13  General Category / Application ideas and development Q/A / A security solution. on: January 15, 2010, 10:07:19 AM
 I was working on a robotics thing with my plug and blew out most of the motor control system so my robotics plug project took a major turn toward the back burner for a while.

But, recently i had the "pleasure" of helping a company relocate offices and got chatting to their security guys. Anyways, long story short I did a bit of searching round the web and there are plenty of components for building a security system that should be plug-compatible. By all this I mean proximity card and motion detection stuff. Alot of the components security people use are actually hooked up with serial (rs232/485/ttl and the like) and are very simplistic (they get the job done, basically) and not alot of them have much in the way of real networking capabilities.

There are quite a few rfid card readers (door entry systems) out there that talk either serial or usb (and are usb-to-serial anyways), same goes with motion detection systems and door opening mechanisms. Ultimately you could pull the plug out of its case, throw it into another case with a 12v SLA battery backup and the power requirements for driving it all are surprisingly low. Theres not alot of software out there at the moment for running on linux to control such a system, but it really wouldn't be overly complex to write something web-based to do all the work. Theres the possibility of adding something like zoneminder on there too at some point too.

The problem I cant solve though is that in order to do all this, even a small system is clocking up about 8 serial connections and I cant find anything that would allow me to achieve that number of serial connections (without just plugging in multiple usb hubs and usb-to-serial adapters - im not sure the plug would even survive that many connectors anyway). There are a couple of multi-serial-port usb adapters out there, but I was curious if anyones seem anything that allows some flexibility (as in one usb port and scale up to 30-odd serial connections)?
14  General Category / Application ideas and development Q/A / Re: Micro Data Center Using Plug Computer?? on: January 15, 2010, 09:40:39 AM
I was thinking something similar at one point. What I did was pull the plug apart and measure the size of the board and figured out i could fit 40 plugs into a 1ru 19" case (played around with the protocase designer software thingy and it looks like it should fit), with a 5v power supply and a small 48 port switch on the back.

While i was thinking about wiring I was tyring to find something that could be a usb target (i.e. pretend to be the other end of the USB bit and pretend to be storage)... didn't find anything particularly promising. Sata is a different story, there is some stuff out there for being a sata target but thats quite tricky.

Ultimately though, I figured "hey, why put storage on it at all" and decided network booting the thing onto an iscsi or vblade/aoe volume is probably possible (or even kernel/initrd in the nand and nfs root, but network booting is way more functional when considering failure's and provisioning). What I was considering it all for was as a vps replacement (without virtualisation). 40 512Mb nodes in a 1ru unit is pretty decent density and you get the added bonus of saying to people "yeah, your not sharing resources like you would be with vps's".

I never really got very far with this cause I had other things on my mind, mostly just pulled out the case designer to see how it all might fit together. I had a quick glance at how plugs network boot but didn't do much else really.
15  Hardware and U-Boot firmware / Hardware / Re: Enabling Esata on V1.3 Sheeva Plug - Progress Report. on: January 15, 2010, 09:09:31 AM
Hi Guys, im feeling like a bit of an idiot or i've missed something. I've seen a list of components people are using, and roughly were they go but nothing to match the two up.

Any chance someone who's done the esata mod can post a couple of pics of the board where the components went and what type they were?

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