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The Saturday 2008-01-05 at 22:24 +0100, jdd wrote:
I have an USB drive (hard drive), but it is always spinning. Is it possible
to make it stop when unused?
Ouch!
That would be nice to have, but... we can't. The culprit this time is
hardware: the usb boxes have a limited chipset that do not include the
necessary functions for this to work. Ie, you can not order the hard-drive
to spin down. See:
nimrodel:~ # hdparm /dev/sda
/dev/sda:
HDIO_GET_32BIT failed: Invalid argument
HDIO_GET_UNMASKINTR failed: Invalid argument
HDIO_GET_DMA failed: Invalid argument
HDIO_GET_KEEPSETTINGS failed: Invalid argument
readonly = 0 (off)
readahead = 256 (on)
geometry = 7297/255/63, sectors = 117231408, start = 0
nimrodel:~ # hdparm -i /dev/sda
/dev/sda:
HDIO_GET_IDENTITY failed: Invalid argument
nimrodel:~ # hdparm -y /dev/sda
/dev/sda:
issuing standby command
HDIO_DRIVE_CMD(standby) failed: Invalid argument
nimrodel:~ # hdparm -S 100 /dev/sda
/dev/sda:
setting standby to 100 (8 minutes + 20 seconds)
HDIO_DRIVE_CMD(setidle1) failed: Invalid argument
nimrodel:~ # smartctl -a /dev/sda
smartctl version 5.37 [i686-suse-linux-gnu] Copyright (C) 2002-6 Bruce
Allen
Home page is http://smartmontools.sourceforge.net/
Device: ST360020 A Version: 0000
Serial number: E30XN9M7
Device type: disk
Local Time is: Sat Jan 5 23:42:20 2008 CET
Device does not support SMART
Error Counter logging not supported
Device does not support Self Test logging
(That drive was previously an internal drive, and all those commands
worked).
The only idea I have is to connect it "inside", program the settings, and
tell it to remember the settings (hdparm -K), but I don't know if they
survive power-off, or only a reset.
The real solution is somebody finding an usb box having a chipset wit
complete feature set.
- --
Cheers,
Carlos E. R.
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