Don't buy crappy SD cards - i.e. PNY. That is especially true in an application where it's used 24/7 as a solid state drive. Wear leveling in flash is very important and crappy flash won't endure. Assi Kk7kx.ampr.org
-----Original Message----- From: 44net-bounces+assi=kiloxray.com@hamradio.ucsd.edu [mailto:44net-bounces+assi=kiloxray.com@hamradio.ucsd.edu] On Behalf Of kb9mwr@gmail.com Sent: Tuesday, October 22, 2013 8:59 AM To: 44net@hamradio.ucsd.edu Subject: Re: [44net] Raspberry Pi
(Please trim inclusions from previous messages) _______________________________________________ It's funny how you though going away from a moving disk hard-drive would be a good thing.
Anyway here are my experiences. I have several Pi's in use. I have had a lot of head aches with PNY SD Cards. They go bad in rather short order. I have had a few Sandisk cards that have been in use just over a year. I have yet to have a problem with Sandisk. _________________________________________ 44Net mailing list 44Net@hamradio.ucsd.edu http://hamradio.ucsd.edu/mailman/listinfo/44net http://www.ampr.org/donate.html
Brian et al,
Myself I use 2,5" WD 500GB HDD SATA black - 5 years warranty!
Best regards. Tom sp2lob
I have a 1tb usb external that I want to use...I don't even want to use the sd card but I guess I'm forced to just to boot... On 13-10-22 01:19 PM, sp2lob@tlen wrote:
(Please trim inclusions from previous messages) _______________________________________________ Brian et al,
Myself I use 2,5" WD 500GB HDD SATA black - 5 years warranty!
Best regards. Tom sp2lob
44Net mailing list 44Net@hamradio.ucsd.edu http://hamradio.ucsd.edu/mailman/listinfo/44net http://www.ampr.org/donate.html
SD card is the _must_ for Pi to boot... To my knowledge - there is no other choice.
Best regards. Tom - sp2lob
Yes, the Pi boots from the SD, but one can put files on an attached drive, especially swap, database, and logs. With a little configuration one could probably put everything except the boot configuration on an external drive and never write to the SD.
------------------------------ John D. Hays K7VE PO Box 1223, Edmonds, WA 98020-1223 http://k7ve.org/blog http://twitter.com/#!/john_hays http://www.facebook.com/john.d.hays
On Tue, Oct 22, 2013 at 12:05 PM, sp2lob@tlen.pl wrote:
(Please trim inclusions from previous messages) ______________________________**_________________ SD card is the _must_ for Pi to boot... To my knowledge - there is no other choice.
Best regards. Tom - sp2lob
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Indeed, if you put the /boot on the SD and make sure you use and initrd that has USB support that has been loaded by the time the kernel will mount the root device, you can use the USB disk for all the rest.
On Tue, Oct 22, 2013 at 11:26 PM, K7VE - John k7ve@k7ve.org wrote:
(Please trim inclusions from previous messages) _______________________________________________ Yes, the Pi boots from the SD, but one can put files on an attached drive, especially swap, database, and logs. With a little configuration one could probably put everything except the boot configuration on an external drive and never write to the SD.
John D. Hays K7VE PO Box 1223, Edmonds, WA 98020-1223 http://k7ve.org/blog http://twitter.com/#!/john_hays http://www.facebook.com/john.d.hays
On Tue, Oct 22, 2013 at 12:05 PM, sp2lob@tlen.pl wrote:
(Please trim inclusions from previous messages) ______________________________**_________________ SD card is the _must_ for Pi to boot... To my knowledge - there is no other choice.
Best regards. Tom - sp2lob
______________________________**___________ 44Net mailing list 44Net@hamradio.ucsd.edu http://hamradio.ucsd.edu/**mailman/listinfo/44nethttp://hamradio.ucsd.edu/mailman/listinfo/44net http://www.ampr.org/donate.**html http://www.ampr.org/donate.html
Hi all,
If we are to use an external harddrive and an external USB Hub, why not get a mini-ITX MBO powered with 12V and a small mini-ITX box? This way we can have a decent CPU which is also low power in electricity not low in computing power (about 30 watts total).
I think the RPi is only good in portable apps, but then again the SD Card is a major handicap. It could be good for applications that are not 24/7/365, such as an event where an AMPRnet GATEWAY is desired only for a few hours or maybe a few days max. If you operate the SD Card for more than a few days, it might get destroyed from the constant write of log files, updating databases etc.
Can we have a system with no writting on the disk all the time? I'm not sure.
73 de Demetre SV1UY
On Wed, Oct 23, 2013 at 12:26 AM, K7VE - John k7ve@k7ve.org wrote:
(Please trim inclusions from previous messages) _______________________________________________ Yes, the Pi boots from the SD, but one can put files on an attached drive, especially swap, database, and logs. With a little configuration one could probably put everything except the boot configuration on an external drive and never write to the SD.
John D. Hays K7VE PO Box 1223, Edmonds, WA 98020-1223 http://k7ve.org/blog http://twitter.com/#!/john_hays http://www.facebook.com/john.d.hays
On Tue, Oct 22, 2013 at 12:05 PM, sp2lob@tlen.pl wrote:
(Please trim inclusions from previous messages) ______________________________**_________________ SD card is the _must_ for Pi to boot... To my knowledge - there is no other choice.
Best regards. Tom - sp2lob
______________________________**___________ 44Net mailing list 44Net@hamradio.ucsd.edu http://hamradio.ucsd.edu/**mailman/listinfo/44nethttp://hamradio.ucsd.edu/mailman/listinfo/44net http://www.ampr.org/donate.**html http://www.ampr.org/donate.html
On Wed, Oct 23, 2013 at 12:40:32AM +0300, Demetre SV1UY wrote:
Can we have a system with no writting on the disk all the time? I'm not sure.
The technique used to do this in embedded systems is often to have the variable filesystems (/tmp, /var) mounted on a RAMdisk. At boot time the RAMdisk is created and a stored image restored onto it from the main flash. At system shutdown time, a new /var image is generated and stored to flash. Thus flash is only written to when the system is regenerated. Swap is disabled.
This would be difficult to do with the Pi because it is so limited in main memory, but it works on larger systems just fine. I've had a FreeBSD box running this way (with flash, no hard drive) for several years. - Brian
Yep Brian,
I have 2 FreeNAS Boxes here that boot from a USB memory stick, but one has 8GB RAM and the other 4GB RAM.
Poor RPi has either 356MB or 512MB RAM. I have 2 of them and they have destroyed 2 SD Cards up to now! No good for a 24/7/365 AMPRnet GATEWAY that has a ull time BBS and an IGATE!
Might be good for emergency work that lasts a few hours of a couple of days, but no more.
73 de Demetre SV1UY
On Wed, Oct 23, 2013 at 12:49 AM, Brian Kantor Brian@ucsd.edu wrote:
(Please trim inclusions from previous messages) _______________________________________________ On Wed, Oct 23, 2013 at 12:40:32AM +0300, Demetre SV1UY wrote:
Can we have a system with no writting on the disk all the time? I'm not sure.
The technique used to do this in embedded systems is often to have the variable filesystems (/tmp, /var) mounted on a RAMdisk. At boot time the RAMdisk is created and a stored image restored onto it from the main flash. At system shutdown time, a new /var image is generated and stored to flash. Thus flash is only written to when the system is regenerated. Swap is disabled.
This would be difficult to do with the Pi because it is so limited in main memory, but it works on larger systems just fine. I've had a FreeBSD box running this way (with flash, no hard drive) for several years. - Brian _________________________________________ 44Net mailing list 44Net@hamradio.ucsd.edu http://hamradio.ucsd.edu/mailman/listinfo/44net http://www.ampr.org/donate.html
I must chime in I have had bad luck with PNY USB Sticks SD Cards PC RAM...
Kingston seems to be the best going.. Just my 2c
Jerry Kutche Electrical Supervisor
Lehigh Cement Company LLC 180 N. Meridian Road Mitchell, IN 47446 Phone: (812) 849-2191 ext. 252 Fax: (812) 849-5007 Cell: (812) 583-0445 jkutche@lehighcement.com www.lehighcement.com This e-mail may contain confidential and/or legally privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and delete this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden.
-----Original Message----- From: 44net-bounces+jkutche=lehighcement.com@hamradio.ucsd.edu [mailto:44net-bounces+jkutche=lehighcement.com@hamradio.ucsd.edu] On Behalf Of Assi Friedman Sent: Tuesday, October 22, 2013 12:04 PM To: 'AMPRNet working group' Subject: Re: [44net] Raspberry Pi
(Please trim inclusions from previous messages) _______________________________________________ Don't buy crappy SD cards - i.e. PNY. That is especially true in an application where it's used 24/7 as a solid state drive. Wear leveling in flash is very important and crappy flash won't endure. Assi Kk7kx.ampr.org
-----Original Message----- From: 44net-bounces+assi=kiloxray.com@hamradio.ucsd.edu [mailto:44net-bounces+assi=kiloxray.com@hamradio.ucsd.edu] On Behalf Of kb9mwr@gmail.com Sent: Tuesday, October 22, 2013 8:59 AM To: 44net@hamradio.ucsd.edu Subject: Re: [44net] Raspberry Pi
(Please trim inclusions from previous messages) _______________________________________________ It's funny how you though going away from a moving disk hard-drive would be a good thing.
Anyway here are my experiences. I have several Pi's in use. I have had a lot of head aches with PNY SD Cards. They go bad in rather short order. I have had a few Sandisk cards that have been in use just over a year. I have yet to have a problem with Sandisk. _________________________________________ 44Net mailing list 44Net@hamradio.ucsd.edu https://urldefense.proofpoint.com/v1/url?u=http://hamradio.ucsd.edu/mailman/... https://urldefense.proofpoint.com/v1/url?u=http://www.ampr.org/donate.html&a...
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