New subject: Raspberry Pi

23 Oct 2013

I am not sure that overclocking is relevant to NAND flash.  The issue is
quality control for the device.  NAND cells are simple and the process
drives reliability significantly.  Vendors pay per quality, which translates
to a number of cycles the device will endure.  Well known brands demand and
get better dies.   Overclocking NAND will result in timing violations that
will lead to failed commands - but it will not damage the die.  This is
different from the traditional overclocking to death of CPUs.  The order of
magnitude of power makes a significant difference.
Assi

-----Original Message-----
From: 44net-bounces+assi=kiloxray.com(a)hamradio.ucsd.edu
[mailto:44net-bounces+assi=kiloxray.com@hamradio.ucsd.edu] On Behalf Of
Jerry
Sent: Tuesday, October 22, 2013 4:11 PM
To: 'AMPRNet working group'
Subject: Re: [44net] Raspberry Pi

(Please trim inclusions from previous messages)
_______________________________________________
Hi Demetre.

Have you studied the Compatibility list... Some are shown to be a bad
choice.. Some Kingston are listed as such.

My first two SD cards I got from Fry's Electronics and they were I think,
PNY brands. PNY I have found even their USB Sticks are junk.. But the two I
got were only $4 ea.. Bad choice for the Pi. One lasted a few weeks the
other until I had a sudden power outage about 6 weeks into it.

I now have 2 Kingston SDXC Card 128GB Class 10 SDX10V/128GB Running on TWO
pi.. Or Pi Squared.. lol

One is under heavy abuse.. I have tried experimenting with sudden power
outages, and constant read writes on one unit... And it has not suffered any
issues.. In Fact I even tried it from -20F to +140F for S&G's They are NOT
OVERCLOCKED. 

The other runs w9hu BBS Linbpq..

What do you use to image the SD card I used to use Windows program WinDisk32
.. I think this is the biggest issue with the Pi SD Cards..

At least I have had no issues with mine since I stopped that practice.

Also what are you using that requires an external HUB.. You can also connect
a TNC (other serial devices) to the GPiO port instead of the USB. Have you
tried a PiTNC yet? Makes good topping.. :) it is the same size and sits atop
the Pi. Like Icing!!

73 Jerry N9LYA

PS I ll try to get back one the conv server as time permits..

_________________________________________
44Net mailing list
44Net(a)hamradio.ucsd.edu
http://hamradio.ucsd.edu/mailman/listinfo/44net
http://www.ampr.org/donate.html