Oliver Fromme wrote: > > Joerg Sonnenberger wrote: > > This is not true. Many hard disks don't like having to do an emergency > > shutdown as it affects the disk life time negatively. That's what > > happens if you poweroff the machine when the disks are still spinning. > > Can you point to any authoritative information (URL) about > that claim, such as vendor specs, white paper or similar?
http://www.hitachigst.com/tech/techlib.nsf/techdocs/28DCCB17E0EEC5A086256F4E006E2F5B Thats the specification for my notebooks hard drive. Section 6.6 Reliability gives data about how to power-off the disk. It also contains numbers of supported load/unloads and emergency unloads. Emergency unloads are invoked when the heads are still loaded and power fails. > The product supports a minimum of 600,000 normal load/unloads. > The drive supports a minimum of 20,000 emergency unloads. Tobias _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
