Ubuntu
acpi-support package

  1. Bug #59695
  2. Comment #804

Comment 804 for bug 59695

Revision history for this message
Yann (lostec) wrote :

6 Month ago I upgraded a previous 2.5" laptop internal WD Sata 320GB 5400rpm HDD for another WD (scorpio black?) 750GB 7200rpm:

cat /proc/scsi/scsi

labels it as:
WDC WD7500BPKT-0 Rev: 01.0

The 320GB one was responding to various "hdparm -B VALUE" values... with 254/255 shutting off spindown/unload completely...
The 750GB new one doesn't seems to care at all!

Ubuntu version unchanged (10.04), only disks copy (dd command with an USB adapter)/changed.

And unload seems more brutal and loud than previous device, maybe because of increased rpms.

For the moment, no problem with it... but the issue is probably with new HDD firmwares that does not take care of energy saving modes/values to exhibit good performance per watt figures in tests, whatever the test configuration/OS. Even if that may cause reliability problems.

Needless to say that booting windows partition does not change anything. That's not a linux problem.