I've got a Western Digital WD3200AAJS HDD and am trying to spin it up (I don't really need it as an HDD, I need just its motor to work).

After connecting the power cord it didn't spin up, so I am in doubt whether it is dead or it just needs to receive something through SATA connector.

For comparison: a Samsung HD401LJ disk spins up with only power connected.

I tried to find l7251 3.1 datasheet to find SPNENAB pin, but didn't find any datasheet.

Probably you could leave a link to resource where simple HDD motor driver (instead of dead one) is described. I do not really care at which speed exactly it will spin if the speed is stable.


closed as off topic by jippie, Leon Heller, user17592, Dave Tweed, Olin Lathrop May 6 '13 at 12:25

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  • \$\begingroup\$ I think it this question is a better fit for superuser. Hang on, see what the others say about it. \$\endgroup\$ – jippie May 5 '13 at 15:27
  • \$\begingroup\$ @jippie: I doubt this. They do not dig deep into devices. \$\endgroup\$ – Paul May 5 '13 at 16:42
  • \$\begingroup\$ As a practical matter, you might see what happens if the SATA cable is connected to a host, unless you are worried that the drive might be damaged enough to harm something it is connected to. \$\endgroup\$ – Chris Stratton May 5 '13 at 16:42
  • \$\begingroup\$ @Paul - we can't really dig deeply into the specifics of "all" devices either. The only way the question can be answered for "all" is to find something relevant in a spec - and even then, incomplete compliance by devices actually on the market is not unheard of (for example, lots of USB devices and hosts play fast and loose with some of the rules). \$\endgroup\$ – Chris Stratton May 5 '13 at 16:45
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    \$\begingroup\$ R/C hobby type brushless motor drivers (of which there are lots of open source project plans and firmware) will spin a CD-ROM spindle motor (and generally be way overrated for it - people typically rewind and re-magnet the motors before using them), don't know if they would work with an HDD motor but there's a fair chance. \$\endgroup\$ – Chris Stratton May 5 '13 at 16:52

Hard drives should spin up as soon as power is connected. Some of the firmware data is stored on the drive itself and needs to be read for the drive to operate. If the drive does not spinup with power then it is most likey dead.

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    \$\begingroup\$ Is this part of the SATA spec, or is it implementation detail of specific models? \$\endgroup\$ – Chris Stratton May 5 '13 at 16:35
  • \$\begingroup\$ -1 Do you have citations? I don't believe the part on storing operation data on the drive platter. \$\endgroup\$ – shimofuri May 5 '13 at 20:39
  • \$\begingroup\$ I don't know if it is spec or not, but I have never come across one that hasn't. \$\endgroup\$ – Butters May 5 '13 at 23:13

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