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Re: Clock jitter for the SATA and SATA II interface

RKMA
Prodigy 40 points

Dear Mariana or others,

Question:  I'd like to use a Seagate Momentus drive, which requires a password to access, in order to secure data on a remote embedded device.  So I'm wondering if you think it would be feasible to design a little board with something on it (some kind of OMAP/?) which has only one function:

- At powerup or reboot (?) my little board would solicit a password either via text or just wait for it, over some kind of serial port

- it would then hook into the Momentus drive's SATA interface to deliver the needed password and therefore unlock the drive

- and then get the heck out of the way.  Somehow I'd open-collector the SATA wires so that it wouldn't interfere with the normal SATA interface.  I don't know boo about SATA at this point but if the little board could temporarily drive, it might be able to drive the interface relatively slowly and deliver this password. 

Problem being that laptop manufacturers normally provice "BIOS support" to deliver that password, but I'm running an embedded device and can't find anything that will unlock the drive.

Do you have any suggestions?

Thanks,

 

:) Robert

  • TI__Expert 7435 points

    Robert,

    I assume you would have to pass the password through standard ATA commands (and that is what BIOS on PC platforms would do).  If so you could write a small utility that would interact with the drive before the actual commands to the drive are issued over SATA interface.  This command sequence would unlock the drive.  Would'nt this approach be simpler and would work for any locked driver and not just for Seagate?

    regards

    swami