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HDD not sleep

/sys/block/sda : /sys/devices/platform/rdb/f0471000.xhci_v2/usb2/2-2/2-2.4/2-2.4:1.0/host2/target2:0:0/2:0:0:0

opkg install hdparm(this is a more extended version) is ok

root@gbquad4k:~# hdparm -C /dev/sda

/dev/sda:
 drive state is:  active/idle
root@gbquad4k:~# hdparm -y /dev/sda

/dev/sda:
 issuing standby command
root@gbquad4k:~# hdparm -C /dev/sda

/dev/sda:
 drive state is:  standby

maybe add xhci_v2 as internal hdd?

root@gbquad4k:~# opkg remove hdparm
Removing hdparm (9.60) from root...
update-alternatives: Linking /sbin/hdparm to /bin/busybox.nosuid
root@gbquad4k:~# hdparm -C /dev/sda

/dev/sda:
hdparm: HDIO_DRIVE_CMD: Invalid argument
 drive state is:  unknown
root@gbquad4k:~# hdparm -y /dev/sda

/dev/sda:
 issuing standby command
hdparm: HDIO_DRIVE_CMD: Invalid argument

Simple

add /etc/rcS.d/S99hdparm120.sh

chmod 755 /etc/rcS.d/S99hdparm120.sh

#!/bin/sh

[ ! -e /sbin/hdparm.hdparm ] && opkg install hdparm
[ -e /sbin/hdparm.hdparm ] && hdparm -S 120 /dev/sda
exit 0

Often these USB to SATA bridges don't support setting the platter spinning timeout.

Same is true for those built into an enclosure. I have several here that completely ignore any spinning setting, they just always spin.

Same is true for those built into an enclosure. I have several here that completely ignore any spinning setting, they just always spin.

opkg install hdparm for test.

Yes, I know, doesn't make any difference, the USB to SATA chipset used simply ignores it.

Which is common practice.

For info...

Add this option in plugin enigma2-plugin-systemplugins-mountmanager

ver. 3.1 - "Add standby HDD via 10 min. (hdparm)"