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[tom99]

I NEED AN IMAGE FOR THE SD-CARD FOR V1 MBOARD FROM AUGUST.
Every link on the forums says "account has been disabled due to high traffic". This applies to all "drop box" links. I NEED AN IMAGE FOR V1 MBOARD SDCARD, BOTH MINE DIED.
Please and thank you...

  go here https://bitcointalk.org/index.php?topic=287590.0

Error (509)
This account's public links are generating too much traffic and have been temporarily disabled!

I can't believe MegaBigPower doesn't have images on their damn website. ALL SD-CARD IMAGE LINKS ARE DISABLED OR OTHERWISE NOT WORKING. I need a damn image for an sd card for August V1 MBOARD....

Have you tried looking on the tuning OP?  Last I knew Dave had the link there.
https://bitcointalk.org/index.php?topic=288109.msg3085566#msg3085566

  linke still ok

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[xstr8guy]

I just got some old style H cards today so I shutdown and inserted the cards.  And of course when I restarted, the SD card won't boot.  This has happened every single time I've shutdown and restarted.  Why?!  Now I have to re-image the card and try again. 

What am I doing wrong here?

[Biomech]

I just got some old style H cards today so I shutdown and inserted the cards.  And of course when I restarted, the SD card won't boot.  This has happened every single time I've shutdown and restarted.  Why?!  Now I have to re-image the card and try again. 

What am I doing wrong here?

I couldn't guess what's causing the problem. But I can answer your question.

SD cards are CHEAP. You should have a few already flashed, then it's a 30 second issue.

[kaerf]

I just got some old style H cards today so I shutdown and inserted the cards.  And of course when I restarted, the SD card won't boot.  This has happened every single time I've shutdown and restarted.  Why?!  Now I have to re-image the card and try again. 

What am I doing wrong here?

I couldn't guess what's causing the problem. But I can answer your question.

SD cards are CHEAP. You should have a few already flashed, then it's a 30 second issue.

agreed. the kingston sdcards are realllllly realllly bad. if you blow on them wrong, they die. I picked up a few spare SDs for ~$6.

not sure if it helps, but i've been adding the 'sync' command before shutting down my bitfurys...like the old days.

[tom99]

I just got some old style H cards today so I shutdown and inserted the cards.  And of course when I restarted, the SD card won't boot.  This has happened every single time I've shutdown and restarted.  Why?!  Now I have to re-image the card and try again. 

What am I doing wrong here?

   you can use usb flash for FS.

[klondike_bar]

I just got some old style H cards today so I shutdown and inserted the cards.  And of course when I restarted, the SD card won't boot.  This has happened every single time I've shutdown and restarted.  Why?!  Now I have to re-image the card and try again. 

What am I doing wrong here?

the one and ONLY time i used the shutdown command, my sd card needed to be re-imaged in order to start up the system. I ALWAYS turn off the psu if i want to turn off the miner, and turn on the miner via turning on the psu

[xstr8guy]

I just got some old style H cards today so I shutdown and inserted the cards.  And of course when I restarted, the SD card won't boot.  This has happened every single time I've shutdown and restarted.  Why?!  Now I have to re-image the card and try again.  

What am I doing wrong here?

I couldn't guess what's causing the problem. But I can answer your question.

SD cards are CHEAP. You should have a few already flashed, then it's a 30 second issue.

I did have a backup card ready to go.  But that one became corrupted too at startup, lol.  I imaged both the cards again and voila, running again.

The cards are running well without OC at 33GH/s average between the 4 new cards.

[tom99]

I just got some old style H cards today so I shutdown and inserted the cards.  And of course when I restarted, the SD card won't boot.  This has happened every single time I've shutdown and restarted.  Why?!  Now I have to re-image the card and try again.  

What am I doing wrong here?

I couldn't guess what's causing the problem. But I can answer your question.

SD cards are CHEAP. You should have a few already flashed, then it's a 30 second issue.

I did have a backup card ready to go.  But that one became corrupted too at startup, lol.  I imaged both the cards again and voila, running again.

The cards are running well without OC at 33GH/s average between the 4 new cards.

  make sure you have fan on new hboards are getting very hot.

[xstr8guy]

I just got some old style H cards today so I shutdown and inserted the cards.  And of course when I restarted, the SD card won't boot.  This has happened every single time I've shutdown and restarted.  Why?!  Now I have to re-image the card and try again.  

What am I doing wrong here?

I couldn't guess what's causing the problem. But I can answer your question.

SD cards are CHEAP. You should have a few already flashed, then it's a 30 second issue.

I did have a backup card ready to go.  But that one became corrupted too at startup, lol.  I imaged both the cards again and voila, running again.

The cards are running well without OC at 33GH/s average between the 4 new cards.

  make sure you have fan on new hboards are getting very hot.

Yep, already had fans on the rig. 

[Trongersoll]

I've been using shutdown, but it reboots automaticly. so when it asks for a login i turn off the power supply. so far that hasn't hurt the SD card.

[klondike_bar]

is there any way to prevent the creeping change in resistance that occurs in the hours (or even days!) after a pencil mod? 24hrs ago i modded both my boards (august and oct versions) to run at roughly 35GH

within 2hrs they ran at 36.5
within 4hrs they ran at 37.5
within 12 hours, 38.5
now, at 24hrs, they are both pushing up into the 39.5-40.5GH range and starting to induce errors and intermittent shutoff of chips in 1 board until i swiped off a tiny bit of the graphite to drop it back to 38.5GH

I dont mind them creeping up a bit, but its hard to tell if/when/where it will plateau. IME, 41GHash is about the point where (even with lots of airflow) chips start to turn off, eventually the whole board is left with 0-4 running chips (at about 2.4-2.5GH each)

[xstr8guy]

I just got some old style H cards today so I shutdown and inserted the cards.  And of course when I restarted, the SD card won't boot.  This has happened every single time I've shutdown and restarted.  Why?!  Now I have to re-image the card and try again. 

What am I doing wrong here?

I couldn't guess what's causing the problem. But I can answer your question.

SD cards are CHEAP. You should have a few already flashed, then it's a 30 second issue.

agreed. the kingston sdcards are realllllly realllly bad. if you blow on them wrong, they die. I picked up a few spare SDs for ~$6.

not sure if it helps, but i've been adding the 'sync' command before shutting down my bitfurys...like the old days.

Would you please post the full command line?  I'm not familiar with Linux.  Thanks!

[tom99]

is there any way to prevent the creeping change in resistance that occurs in the hours (or even days!) after a pencil mod? 24hrs ago i modded both my boards (august and oct versions) to run at roughly 35GH

within 2hrs they ran at 36.5
within 4hrs they ran at 37.5
within 12 hours, 38.5
now, at 24hrs, they are both pushing up into the 39.5-40.5GH range and starting to induce errors and intermittent shutoff of chips in 1 board until i swiped off a tiny bit of the graphite to drop it back to 38.5GH

I dont mind them creeping up a bit, but its hard to tell if/when/where it will plateau. IME, 41GHash is about the point where (even with lots of airflow) chips start to turn off, eventually the whole board is left with 0-4 running chips (at about 2.4-2.5GH each)

  better way to do it change resistor.

[klondike_bar]

is there any way to prevent the creeping change in resistance that occurs in the hours (or even days!) after a pencil mod? 24hrs ago i modded both my boards (august and oct versions) to run at roughly 35GH

within 2hrs they ran at 36.5
within 4hrs they ran at 37.5
within 12 hours, 38.5
now, at 24hrs, they are both pushing up into the 39.5-40.5GH range and starting to induce errors and intermittent shutoff of chips in 1 board until i swiped off a tiny bit of the graphite to drop it back to 38.5GH

I dont mind them creeping up a bit, but its hard to tell if/when/where it will plateau. IME, 41GHash is about the point where (even with lots of airflow) chips start to turn off, eventually the whole board is left with 0-4 running chips (at about 2.4-2.5GH each)

  better way to do it change resistor.

all i have is a terrible pencil iron, minimal soldering skills, and no resistor(s). Id rather not risk the downtime to destroy my board

[ktbken]

I've been using shutdown, but it reboots automaticly. so when it asks for a login i turn off the power supply. so far that hasn't hurt the SD card.

If you use

Code:

shutdown -h now

it will not reboot

[EsDva]

I've been using shutdown, but it reboots automaticly. so when it asks for a login i turn off the power supply. so far that hasn't hurt the SD card.

If you use

Code:

shutdown -h now

it will not reboot

just use

poweroff

[Ridicuss]

I've been using shutdown, but it reboots automaticly. so when it asks for a login i turn off the power supply. so far that hasn't hurt the SD card.

If you use

Code:

shutdown -h now

it will not reboot

just use

poweroff

Dont forget sudo before shutdown commands.

sudo shutdown -h now   --should work.

[Morblias]

For those of you looking for the v1 raspberry pi image, i uploaded it to mega: https://mega.co.nz/#!mRg1WDzJ!QYdEySHkHaOjyMJhxdkp8Xt4S6pz8VdUswP7_JyveY4

Note: This is the v1 that Dave put on dropbox in august.

[vs3]

is there any way to prevent the creeping change in resistance that occurs in the hours (or even days!) after a pencil mod? 24hrs ago i modded both my boards (august and oct versions) to run at roughly 35GH

within 2hrs they ran at 36.5
within 4hrs they ran at 37.5
within 12 hours, 38.5
now, at 24hrs, they are both pushing up into the 39.5-40.5GH range and starting to induce errors and intermittent shutoff of chips in 1 board until i swiped off a tiny bit of the graphite to drop it back to 38.5GH

I dont mind them creeping up a bit, but its hard to tell if/when/where it will plateau. IME, 41GHash is about the point where (even with lots of airflow) chips start to turn off, eventually the whole board is left with 0-4 running chips (at about 2.4-2.5GH each)

  better way to do it change resistor.

And if you do do that make sure to pick a resistor with the proper "temperature coefficient" - that is how the resistor value changes with temperature (which is pretty much what you've discovered here, although in your case there is an apparent "aging" of the pencil mod too - the carbon trace that you've added probably oxidizes and becomes more or less conductive).

[goxed]

is there any way to prevent the creeping change in resistance that occurs in the hours (or even days!) after a pencil mod? 24hrs ago i modded both my boards (august and oct versions) to run at roughly 35GH

within 2hrs they ran at 36.5
within 4hrs they ran at 37.5
within 12 hours, 38.5
now, at 24hrs, they are both pushing up into the 39.5-40.5GH range and starting to induce errors and intermittent shutoff of chips in 1 board until i swiped off a tiny bit of the graphite to drop it back to 38.5GH

I dont mind them creeping up a bit, but its hard to tell if/when/where it will plateau. IME, 41GHash is about the point where (even with lots of airflow) chips start to turn off, eventually the whole board is left with 0-4 running chips (at about 2.4-2.5GH each)

Graphite had negative temp coefficient or resistance, (temp, up, resistance down, vice versa). One way would be to make sure you have good airflow around the regulator, along with good heatsinks.