Data storage system with power management and method of operation thereof

Abstract

A method of operation of a data storage system includes: providing a standby power source; detecting activity on a communication channel with an upstream re-driver powered with the standby power source; generating a signal-detect output from the upstream re-driver based on the activity; determining a link status with a power control unit based on the signal-detect output, the power control unit powered with the standby power source; and generating a power output from a power supply unit based on the link status, the power supply unit controlled by the power control unit.

What is claimed is: 
     
         1 . A method of operation of a data storage system comprising:
 providing a standby power source;   detecting activity on a communication channel with an upstream re-driver powered with the standby power source;   generating a signal-detect output from the upstream re-driver based on the activity;   determining a link status with a power control unit based on the signal-detect output, the power control unit powered with the standby power source; and   generating a power output from a power supply unit based on the link status, the power supply unit controlled by the power control unit.   
     
     
         2 . The method as claimed in  claim 1  further comprising asserting a power-off control output by the power control unit for powering off the power supply unit based on the link status as inactive. 
     
     
         3 . The method as claimed in  claim 1  further comprising asserting a power-on control output by the power control unit for powering on the power supply unit based on the link status as active. 
     
     
         4 . The method as claimed in  claim 1  wherein determining the link status includes monitoring the signal-detect output with the power control unit. 
     
     
         5 . The method as claimed in  claim 1  further comprising:
 generating a wake-up command sent by an upstream system; and wherein: 
 generating the signal-detect output includes asserting the signal-detect output by the upstream re-driver based on the wake-up command. 
 
     
     
         6 . A method of operation of a data storage system comprising:
 providing a standby power source;   detecting activity on a communication channel with an upstream re-driver powered with the standby power source;   generating a signal-detect output from the upstream re-driver based on the activity;   determining a link status with a power control unit based on the signal-detect output, the power control unit having a power-off control unit and a wake-up control unit powered with the standby power source; and   generating a power output from a power supply unit based on the link status as active, the power supply unit controlled by the power control unit.   
     
     
         7 . The method as claimed in  claim 6  further comprising asserting a power-off control output by the power-off control unit for powering off the power supply unit with the link status determined as inactive. 
     
     
         8 . The method as claimed in  claim 6  further comprising asserting a power-on control output by the wake-up control unit for powering on the power supply unit with the link status determined as active. 
     
     
         9 . The method as claimed in  claim 6  wherein determining the link status includes monitoring the signal-detect output with the power-off control unit. 
     
     
         10 . The method as claimed in  claim 6  wherein:
 generating the signal-detect output includes: 
 generating a wake-up command sent from an upstream system to the upstream re-driver, and 
 asserting the signal-detect output by the upstream re-driver based on the wake-up command; and 
 determining the link status with the based on the signal-detect output includes determining in the link status as active with the assertion of the signal-detect output.