On Wed, Dec 20, 2017 at 02:13:25PM -0800, Jaegeuk Kim wrote: > This patch adds a new sysfs group, namely health, via: > > /sys/devices/soc/X.ufshc/health/ > > This directory contains the below entries, each of which shows an 8-bytes > hex number representing different meanings defined by JEDEC specfication. > > Users can simply read these entries to check how their underlying flash > storage is getting reached out to its end of life. For example, if > lifetimeA shows 0xb, it would be the right time to consider device swap. > > - length > : must be 25h > > - type > : must be 09h > > - eol > 00h: Not defined > 01h: Normal > 02h: Warning > 03h: Critical > > - lifetimeA/B > 00h: Not defined > 01h: 0% ~ 10% device life time used > 02h: 10% ~ 20% device life time used > 03h: 20% ~ 30% device life time used > 04h: 30% ~ 40% device life time used > 05h: 40% ~ 50% device life time used > 06h: 50% ~ 60% device life time used > 07h: 60% ~ 70% device life time used > 08h: 70% ~ 80% device life time used > 09h: 80% ~ 90% device life time used > 0Ah: 90% ~ 100% device life time used > 0Bh: Exceeded its maximum estimated device life time > > Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx> > --- Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
