Hi All,
I have a question relating to the ATA drives and a SATA drive powerdown.
Currently you can issue a HDD Spindown/Sleep command to a drive which
will result in it going to sleep, but I have a hardware platform that
requires the drive to be Powered-Off completely. (its in an extreme
energy saving mode)
Normal modes the HDD can sleep, and when any IO happens the disk wakes..
I can get the HDD to power-off when it enters deep-sleep (SMART register
reading) but how can I get the disk to re-powered before next access is
needed. Currently the /dev/sdx deregisters when the SATA bus is
disconnected and re-registers when the device is avaliable.
Is there a method to keep the open files alive when the HDD is powered
off and execute a custom hardware relay switch to power the HDD back up
and continue working with the files that were open previous to the sleep?
Is this at all possible?
Best Regards
Richard
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