maemo.org - Talk - View Single Post - test your sd card read speeds on n800

robmiller	08-17-2007 , 03:27 PM
Posts: 64 \| Thanked: 8 times \| Joined on Jun 2007 @ abuja, nigeria (currently)	#1

I've compiled hdparm ( http://sourceforge.net/projects/hdparm/ ) v 7.5 as found on my gentoo distribution for the n800 latest firmware and placed it on http://www.janerob.com/rob/n800/ . it's not a .deb, it is a binary arm executable -- just download and run in an xterm (and I guess you just have to trust me that its not going to turn your n800 into a spam shipping ddos daemon, or re-compile yourself if you like).

I have 2 sdhc cards purchased from www.7dayshop.com, with the following results:

sdhc 8GB - Class 6 - Kingston

Code:

Nokia-N800-26:~# ./hdparm -Tt /dev/mmcblk0p1

/dev/mmcblk0p1:
 Timing cached reads:   240 MB in  2.00 seconds = 119.87 MB/sec
 Timing buffered disk reads:   38 MB in  3.12 seconds =  12.20 MB/sec

sdhc 4GB - High Speed Class 4 (118x)

Code:

Nokia-N800-26:~# ./hdparm -Tt /dev/mmcblk1p1

/dev/mmcblk1p1:
 Timing cached reads:   244 MB in  2.00 seconds = 122.03 MB/sec
 Timing buffered disk reads:   38 MB in  3.09 seconds =  12.28 MB/sec

both of those were the 3rd of 3 runs as suggested by the hdparm manpage, over ssh to the n800. clearly as others have written the class 6 isn't worth it, at least for reads on the n800.

please post your own card details and numbers so I can make better choices next time.

oh yes, I'm using the updated kernel from http://intr.overt.org/4.2007.26-mmc-kernel/

Code:

Nokia-N800-26:~# cat /proc/version
Linux version 2.6.18-omap1 (maemo@ubuntu-maemo) (gcc version 3.4.4 (release) (CodeSourcery ARM 2005q3-2)) #2 Sun Jul 22 11:29:39 PDT 2007

and boot off of the 8gb card in the internal slot.

anyone suggest a preferred write speed tester?

rob.

Quote & Reply |