As I don't have hdparm
nor smartctl
available on my NAS I checked the /proc
as I assumed that it had to be there somewhere, too.
Well, if it's down:
root@NAS:~# cat /proc/d_suspdtime
SuspendingTime = 15
Disk0: STANDBY
Disk1: No_Disk
root@NAS:~#
If the kitten would go crazy on it:
root@NAS:~# cat /proc/d_suspdtime
SuspendingTime = 15
Disk0: ACTIVE
Disk1: No_Disk
root@NAS:~#
I also got
root@NAS:/proc# cat /proc/d_suspdtime
SuspendingTime = 15
Disk0: NO_ACTIVE
Disk1: No_Disk
root@NAS:~#
Guessing from some testing:
ACTIVE
: the HDD did something within a certain timespan (it doesn't seem to mean that it does something right now)
NO_ACTIVE
: there was some activity, but in a while it'll be going to standby
STANDBY
: well, the HDD is in standby
And to be complete on this SuspendingTime
is the time in minutes after the HDD should go to standby.
Since I'm no Unix-pro I can't tell if you are supposed to have /proc/d_suspdtime
on your system, too (guessing from Google results it may be related to NAS or busybox).