Timeline for Internal hard drive with data cable connected but power cable disconnected
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Feb 18, 2016 at 15:14 | comment | added | Zeiss Ikon | I wasn't aware of that -- I'm not familiar with IC-specific or component-level electronics, and have no idea what's on a hard drive logic board. That, however, sounds like lazy design. You can't reasonably control what will be connected to the pins when the board is powered down. | |
| Feb 18, 2016 at 15:00 | comment | added | micheal65536 | Although static discharge is damaging even if the drive has power. I do know that some 4000-series logic ICs can be damaged if they are given input signals without power (and will tend to leak the signal voltage out through their outputs - incorrectly). | |
| Feb 18, 2016 at 14:26 | comment | added | Zeiss Ikon | Ah. TTL or lower voltage on those pins of a powered-down drive board won't do any harm. at least in my experience. It's not like you were allowing static discharge voltages onto those lines. | |
| Feb 18, 2016 at 13:27 | comment | added | micheal65536 | I was thinking more of the "computer sending initialisation commands to drive without power" damaging the data interface on the drive by applying voltage to the data pins when there's no power to the interface controller. | |
| Feb 18, 2016 at 13:25 | history | answered | Zeiss Ikon | CC BY-SA 3.0 |