PPv4: Question about unmounting hard drive

[winestock]

In arm linux when I unmount a hard drive I see that the hard drive is still spinning. Once I have unmounted the hard drive it is safe to simply unplug the hard drive even though it is spinning? Or should I spin down the hard drive first before unplugging it?

[sambul13]

I've a USB HD in enclosure connected to a Plug, and its multi-partitioned. Before switching the plug off, if the HD is spinning, I either wait till it stops due to power saving control of the HD own chipset, or issue the umount command:

$this->bbcode_second_pass_code('', 'for n in /dev/sdb* ; do umount $n ; done')

It still spins after that for some time, but unmounting makes it impossible to write data to it by regular FS means, then I switch the enclosure off right away. Never a problem.

[WarheadsSE]

Or
$this->bbcode_second_pass_code('', '
umount /dev/sdb*
')

[Socaltom]

Modern yards drives are self parking, when not seeking data they park the grad in a safe spot. Once unmounted you can disconnect the drive.
Tom