[arm-allstar] SD Cards

[Doug Crompton]

Just a reminder though that the read/write performance of the SD cards in a Linux application like Asterisk Allstar is immaterial after boot. So using a faster card is not going to make your system run faster. It would allow faster creation of the initial image and possibly faster boots (measured in a few seconds) but in most cases it would not  be practical economically to purchase a super fast SD card. 

The speed which a card writes is also heavily effected by the type of writer (usb2/3) and the SW used to write. So while the relative differences in these tests might be valid the absolute values of these tests could differ greatly based on the hardware and SW used to write.

Tried and true my choice is still the SanDisk Ultra but I am sure there are other cards in it's class that could be used. Also as I mentioned on the web page unless you have a compelling reason it is NOT a good idea to expand the filesystem on these cards after installing the image. Doing so makes total image backup a time consuming process especially on 16GB and larger cards and does nothing to improve performance or longevity. 
73 Doug
WA3DSP
http://www.crompton.com/hamradio


To: arm-allstar at hamvoip.org
From: fred at fmeco.com
Date: Thu, 3 Dec 2015 07:14:41 -0500
Subject: [arm-allstar] SD Cards

found this comparison article this morning and thought it should be shared.
 
http://www.midwesternmac.com/blogs/jeff-geerling/raspberry-pi-microsd-card
 
 
-- 
Fred Moore
email: fred at fmeco.com
       fred at safes.com
phone:  321-217-8699
 
 

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