Comment 3 for bug 1031173

1. To support this feature, following patch need to be backported to raring kernel:

commit 8e725c7f8a60feaa88edacd4dee2c754d5ae7706
Author: David Woodhouse <email address hidden>
Date: Fri Mar 29 11:54:55 2013 +0000

 libata: fix DMA to stack in reading devslp_timing parameters

2. To enable hdparm userland tool to report device DevSleep capability, one patch for hdparm :

https://sourceforge.net/tracker/?func=detail&atid=736684&aid=3610002&group_id=136732

3. To verify this feature, the SATA device should support DEVSLP