SATA HD power management disabling

O. Hartmann ohartman at
Mon Jun 6 06:56:05 GMT 2005

On one of my workstaions (AMD64, FBSD 5.4-STABLE) I utilize two SATA 
drives, one is a 200GB Maxtor (2B200MO, SATA I), the other a Samsung 
200GB (SP2004C, SATA II).

Using atacontrol cap <channel> <device>
shows me on both devices

power management               yes      yes
advanced power management      yes      no
automatic acoustic management  yes      yes

Is there a way to disable automatic acoustic management and power 
management forever? Mainboard is a ASUS A8N-SLI Deluxe, BIOS 1010 (most 
recent), Operation System FreeBSD 5.4-STABLE as most recent cvsupdated 
(I think this doesn't matter, but ...).

I did not find any knob in the BIOS disbaling acoustic and power 
management for the attached harddrives, so I'm a little bit confused.

Especially the Samsung drives seems to need about 1 or 2 seconds 
'starting' when accessed after a while of inactivity, means when showing 
a directory content, it takes a while before the informations show up.


More information about the freebsd-questions mailing list