AnsweredAssumed Answered

HDPARM output for SD card seems to be slow on i.MX6 Sabresd

Question asked by Vincent Chou on Jan 24, 2014
Latest reply on Mar 13, 2014 by Vincent Chou

Hi!  friends,


Could anyone share their experience on the speed of SD access speed on the existing SD card ports on i.MX6 Sabresd?  It seems I could only achieve 19MB/s.  The output is


/dev/mmcblk1: (Local UHSI ultra high speed SD card)

Timing buffered disk reads:   58 MB in  3.00 seconds =  19.31 MB/sec


Is there any method I could tune the speed to a more reasonable one?  I put a Ultra High Speed SD card (Transcend) with a 85MB/s listed on the package; however, I could only get 19.31 MB/s.  If I use a stand SD card,it achieves 14MB/s.  Is this normal?