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 81 
 on: September 17, 2013, 12:23:52 PM 
Started by cbxbiker61 - Last post by apemberton
Thanks for your info and update. I think you are on to it. Is there a link for the Fedora kernel DT source? More minds the better especially to aid my old, worn out grey cells! Tony.

 82 
 on: September 17, 2013, 12:12:19 PM 
Started by Daniel Ng - Last post by trampjuice
IT WAS THE PSU!!!

It has taken me this long to connect a regulated bench PSU. INSANE. My old PSU was a cheap  220V in 5v 2a out dc, so at UK 240v it gradually must have failed over about 2 years. 

Have replaced and hopefully trouble free from now.

 83 
 on: September 17, 2013, 12:05:15 PM 
Started by recursix - Last post by trampjuice
You just have to wait 9 hrs unplugged if your scared the cap will discharge through you when you open the aluminum case to get at the psu.
The whole plug design is crazy as the aluminum is only there to screen the tiny electronics from the psu as its so close together.
I have went through trying to repair the capacitor in the orginal PSU, which worked for 6 months or so, and then taking out the entire module and directly wiring a 5v 2A psu (which was not great quality and lasted only 2 years more as it was not UK 240v in but 220v in) and now I got a proper bench psu thinking there were faults in the unit - only to find it worked perfectly when it had 5v regulated connected.
I hav finally dug out a LINKSYS ATA 5V 2A psu, and wired that in today. It looks higher quality I hope it lasts.
Basically 99% of all sheeva plug problems - erratic behavour, network going down etc.. are going to be down to a failing PSU.
 

 84 
 on: September 17, 2013, 07:24:51 AM 
Started by cbxbiker61 - Last post by pqa
apemberton, my Fedora 3.10.10 kernel IS a device tree kernel, booting a dreamplug device tree.

I have noticed that the device trees from Fedora are not the same as the device trees from Cbxbiker, so I will have a look at that and see if I can fathom if there is anything there.

 85 
 on: September 17, 2013, 02:02:46 AM 
Started by cbxbiker61 - Last post by apemberton
PQA, is your Fedora 3.10.10 kernel a Device Tree kernel? If not, this should help confirm that the console issue is in the Device Tree rather than the kernel itself.

I had a little look at schematics for a Guruplug and some of the Kirkwood data sheet and some of the MPP pins have multiple functions set up depending on initialisation. I see that MPP8 is shared between a gpio control of RTS (Request To Send) for serial and SDA for i2c/smbus; MPP9 is shared between gpio CTS (Clear To Send) and SCK for i2C/smbus.

I have the feeling that when the hardware is activated by the Device Tree code, the setup is not performed correctly for UART0 and possibly for other hardware. I'm not particularly familiar with the Kirkwood architecture so poring over code and datasheets to tie up the devices and initialisation may take some time and I do have other things to do. I am convinced that the kernel itself (as opposed to Device tree) is OK and the problem is not a .config issue.


 86 
 on: September 16, 2013, 06:54:41 PM 
Started by cbxbiker61 - Last post by pqa
I have just booted my Dreamplug on a 3.10.9 cbxbiker kernel, and also a 3.11.1 kernel, and like others I am not getting console output.

I have also attempted to boot a Fedora 3.10.10 kernel, and that IS prodicing console output. It won't bring the system up, however, since for some reason it is not loading orion-ehci.

So it would appear that it is probably not a kernel problem that is causing the lack of console output, but a build/configuration issue.

 87 
 on: September 16, 2013, 05:18:03 AM 
Started by apemberton - Last post by apemberton
I know this product is old and hardly state of the art these days but I rely on them for my network services. Lately, they have become less than perfect in the reliability stakes. I cannot let this situation continue.

I find that I get errors on both MMC (sdhc cards) and hard disks. I am in the process of rebuilding them with external power supply and heatsinks to keep things cooler inside but I am still getting write errors on the unit rebuilt. I have replaced the RTC battery and the micro SDHC card.

In order to improve reliability, I am wondering if the second Sata port has all the components and the second micro SDHC 'socket' is equippped as well. I have checked the board traces against the schematic so I guess this was in the mind of the designer. I know I will have to get connectors as a minimum but I am wondering if anyone has already equipped these second ports and what was needed to make them work (hardware components, u-boot and kernel tweaks)?

Since I need at least two gigabit ethernet ports for routing etc, there are not too many replacement options - perhaps the Smile plug but that is a bit pricey for the job. Any suggestions?

 88 
 on: September 15, 2013, 05:58:32 AM 
Started by cbxbiker61 - Last post by apemberton
Just to add dmesg HDD errors for an esata sheevaplug:-

Code:
ata2: exception Emask 0x10 SAct 0x0 SErr 0x180000 action 0x6 frozen
ata2: edma_err_cause=00000020 pp_flags=00000000, SError=00180000
ata2: SError: { 10B8B Dispar }
ata2: hard resetting link
ata2: SATA link up 3.0 Gbps (SStatus 123 SControl F300)
ata2.00: configured for UDMA/133
ata2: EH complete
ata2: exception Emask 0x10 SAct 0x0 SErr 0x180000 action 0x6 frozen
ata2: edma_err_cause=00000020 pp_flags=00000003, SError=00180000
ata2: SError: { 10B8B Dispar }
ata2: hard resetting link
ata2: SATA link up 3.0 Gbps (SStatus 123 SControl F300)
ata2.00: configured for UDMA/133
ata2: EH complete

2 Errors since last reboot a few days ago. At least these are not destructive. Kernel is DT 3.10.9

 89 
 on: September 15, 2013, 05:22:31 AM 
Started by cbxbiker61 - Last post by apemberton
Marcus,

Thanks for your survey. Actually I am using 32Gb Sandisk Mobile ultra for my Guruplugs! I use 16Gb Integral Endurance (which had been recommended by NewIT because of their Single Layer Cell structure) for the two standard sheevaplugs. However, my other three Sheevaplugs are eSata and boot from the HDD drives (3Gb/Sec interfaces) and I am struggling to rebuild my development system with new 320Gb Western Digital Scorpio Blue drives. Although it cannot be related directly to the Guruplugs, I have tried things like 50cm cables, common power supplies (to avoid ground loops), replaced corroded RTC batteries but still there are issues. I have not seen problems with my eSata Tonidoplugs (also kirkwood) which boot from internal 1TB eSata disks.

I will say that the i-node errors seem to occur at approximately the same location which suggests overuse of the same cells of disk sector.

I did also find these errors on an old 3.7.7 non-Device Tree kernels.  Undecided

I am considering setting up a cron job to reboot my systems automatically during sleeping hours to effect a fsck daily.

 90 
 on: September 15, 2013, 03:01:54 AM 
Started by cbxbiker61 - Last post by marcus11
Hi Tony,

I've researched the 'slowdowns' and found that in my case the SD card had been optimized by the manufacturer for cameras etc with large block sizes for read/writes. This will make a login to linux take up to 10s - 10-20 IOPS! Absolutely pathetic. 

If you can get the Sandisk Mobile Micro Ultra 16-64gb cards they are made for small read/writes in phones and I've benched them doing 4kb read/writes at 300 IOPS / 16gb card and 400IOPS / 64gb card.

They also support trim (sadly only exists as an IOCTL in the raspberry pi kernel, not the sheeva) and supposedly have some wear leveling according to the data sheets.

Suffice to say I won't use anything else any more.

The numbers speak for themselves:
Code:
transcend micro class 6

-----------------------------------------------------------------------
CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    14.871 MB/s
          Sequential Write :    11.002 MB/s
         Random Read 512KB :    14.822 MB/s
        Random Write 512KB :     1.744 MB/s
    Random Read 4KB (QD=1) :     3.993 MB/s [   974.8 IOPS]
   Random Write 4KB (QD=1) :     0.017 MB/s [     4.1 IOPS]
   Random Read 4KB (QD=32) :     4.467 MB/s [  1090.6 IOPS]
  Random Write 4KB (QD=32) :     0.021 MB/s [     5.2 IOPS]

  Test : 100 MB [F: 0.0% (0.0/7770.9 MB)] (x1)
  Date : 2013/05/18 8:54:14
   
 

sandisk 64gb microsd class 6
-----------------------------------------------------------------------
CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    21.177 MB/s
          Sequential Write :     6.972 MB/s
         Random Read 512KB :    21.017 MB/s
        Random Write 512KB :     1.003 MB/s
    Random Read 4KB (QD=1) :     3.572 MB/s [   872.2 IOPS]
   Random Write 4KB (QD=1) :     1.378 MB/s [   336.4 IOPS]
   Random Read 4KB (QD=32) :     3.515 MB/s [   858.1 IOPS]
  Random Write 4KB (QD=32) :     1.454 MB/s [   355.0 IOPS]

  Test : 100 MB [D: 82.7% (49.2/59.5 GB)] (x1)
  Date : 2013/05/18 8:59:37
   
 

kingston 32gb class 4
-----------------------------------------------------------------------
CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    17.142 MB/s
          Sequential Write :     4.246 MB/s
         Random Read 512KB :    17.117 MB/s
        Random Write 512KB :     0.665 MB/s
    Random Read 4KB (QD=1) :     2.113 MB/s [   516.0 IOPS]
   Random Write 4KB (QD=1) :     0.006 MB/s [     1.5 IOPS]
   Random Read 4KB (QD=32) :     2.216 MB/s [   541.1 IOPS]
  Random Write 4KB (QD=32) :     0.006 MB/s [     1.4 IOPS]

  Test : 100 MB [D: 0.0% (0.0/29.9 GB)] (x1)
  Date : 2013/05/18 9:23:40
   
 

sandisk 1gb
-----------------------------------------------------------------------
CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    11.678 MB/s
          Sequential Write :     4.160 MB/s
         Random Read 512KB :    11.576 MB/s
        Random Write 512KB :     1.977 MB/s
    Random Read 4KB (QD=1) :     4.960 MB/s [  1210.9 IOPS]
   Random Write 4KB (QD=1) :     0.027 MB/s [     6.6 IOPS]
   Random Read 4KB (QD=32) :     5.199 MB/s [  1269.3 IOPS]
  Random Write 4KB (QD=32) :     0.027 MB/s [     6.5 IOPS]

  Test : 50 MB [D: 93.0% (897.1/964.7 MB)] (x1)
  Date : 2013/05/18 9:32:44
   


  patriot lx 16gb
-----------------------------------------------------------------------
CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    20.039 MB/s
          Sequential Write :    15.863 MB/s
         Random Read 512KB :    17.797 MB/s
        Random Write 512KB :     1.148 MB/s
    Random Read 4KB (QD=1) :     2.179 MB/s [   532.0 IOPS]
   Random Write 4KB (QD=1) :     0.157 MB/s [    38.4 IOPS]
   Random Read 4KB (QD=32) :     2.604 MB/s [   635.6 IOPS]
  Random Write 4KB (QD=32) :     0.157 MB/s [    38.3 IOPS]

  Test : 50 MB [F: 0.0% (0.0/14.9 GB)] (x1)
  Date : 2013/05/18 10:18:33
   



samsung 16gb
-----------------------------------------------------------------------
CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    18.567 MB/s
          Sequential Write :    17.378 MB/s
         Random Read 512KB :    17.577 MB/s
        Random Write 512KB :     1.365 MB/s
    Random Read 4KB (QD=1) :     2.760 MB/s [   673.8 IOPS]
   Random Write 4KB (QD=1) :     0.014 MB/s [     3.3 IOPS]
   Random Read 4KB (QD=32) :     2.875 MB/s [   701.9 IOPS]
  Random Write 4KB (QD=32) :     0.018 MB/s [     4.3 IOPS]

  Test : 100 MB [F: 0.0% (0.0/15.1 GB)] (x1)
  Date : 2013/06/26 18:31:28
   
 

sandisk 64gb micro ultra mobile class 10
-----------------------------------------------------------------------
CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    21.347 MB/s
          Sequential Write :     8.861 MB/s
         Random Read 512KB :    21.531 MB/s
        Random Write 512KB :    10.338 MB/s
    Random Read 4KB (QD=1) :     5.318 MB/s [  1298.4 IOPS]
   Random Write 4KB (QD=1) :     1.713 MB/s [   418.3 IOPS]
   Random Read 4KB (QD=32) :     4.727 MB/s [  1154.1 IOPS]
  Random Write 4KB (QD=32) :     1.682 MB/s [   410.7 IOPS]

  Test : 100 MB [D: 0.0% (0.0/59.4 GB)] (x1)
  Date : 2013/06/26 18:40:21

Glad I could help with uboot.

Cheers,
marcus

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