On 26 Jul 2005 at 18:20, Godfrey DiGiorgi wrote: > On Jul 26, 2005, at 6:12 PM, Herb Chong wrote: > > > the heads rest on an air bearing when running. when not, they are > > resting on the drive. > > Not in any modern drive that I'm aware of. Any good modern drive's > head mechanism does a retract and lock when powered down.
Of the last 15 or so drives that I've dismantled (big server drives to cheap consumer drives old and new and all failed), none retract the heads, they simply park them at the centre (non-data area) of the platter. The actuator arm often has a physical lock but there is nothing preventing the disk platter from rotating against external forces (either direction) and damaging the heads. Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
