Sorry if this has been asked before but I can’t see a specific answer in the history of the group.
I’m wanting to get the best performance out of “disk” IO on my beagle bone for a disk intensive app I’m running.
I purchased some Class 10, 8Gb Samsung micro SDCards, but the beaglebone just refuses to boot from them (same image on a sandisk class 4 works fine).
Is there any known issues with different classes of micro SDCard? if so, what’s the best I can hope for?
Many thanks in advance
Paul
Before buying any Class X, micro sd cards, this is always a good read:
http://www.sakoman.com/OMAP/microsd-card-perfomance-test-results.html
and for the price, (but depending on your end system environment.)
using an external usb-sata drive can be an option..
My beaglebone is under a big load, so hdparm -tT on /dev/sda might not
be 100% accurate:
voodoo@bone-a3-256mb:~$ uptime
16:07:06 up 21:05, 1 user, load average: 3.77, 3.56, 3.50
voodoo@bone-a3-256mb:~$ sudo hdparm -tT /dev/sda
/dev/sda:
Timing cached reads: 106 MB in 2.04 seconds = 52.07 MB/sec
Timing buffered disk reads: 48 MB in 3.11 seconds = 15.43 MB/sec
voodoo@bone-a3-256mb:~$ sudo hdparm -tT /dev/mmcblk0
/dev/mmcblk0:
Timing cached reads: 108 MB in 2.02 seconds = 53.36 MB/sec
Timing buffered disk reads: 40 MB in 3.14 seconds = 12.75 MB/sec
Regards,