This message is from the T13 list server.
I'm just trying again to see if anyone has any info or suggestions. There were no responses (public or private) the last time... This concerns the sequencing of the 5V and 12V power (for devices that use both) at power on and power off. > Question 1: An ATA hard drive is powered on both +5V and +12V. > Are there any rules or specifications regarding which of these > two power inputs should come up first upon power-up? If so, are > there any timing specifications related to this sequence? > Question 2: What about timing at power off? > Question 3: Any problem if only one of the two are on > (is 5V w/o 12V OK, is 12V w/o 5V OK)? Hale *** Hale Landis *** www.ata-atapi.com ***
