On 09/01/13 14:59, Mark Rogers wrote:
$ sudo hdparm -i /dev/sdf /dev/sdf: HDIO_GET_IDENTITY failed: Invalid argumentI assume that's due to it being on USB?
I guess
However: $ sudo hdparm -I /dev/sdf Commands/features: Enabled Supported: * SMART feature set Security Mode feature set * Power Management feature set Write cache
.. if that helps (I assume that's just confirming that hardware write caching is disabled).
I'm not sure. I suspect it's software, but I can't find out by googling.
Is it worth trying sudo hdparm -W /dev/sdf
This also says if write caching is on or off and you can use sudo hdparm -W 1 /dev/sdf to turn on write caching or sudo hdparm -W 0 /dev/sdf to turn it off
if hdparm -i doesn't work though, these might not work. I've googled for ages and I can't find any other way of telling if write caching is on or off - sorry!
HTH Steve