US 11,657,843 B2
Data storage device seeking multiple actuators to improve performance
Kexiu Liu, Foothill Ranch, CA (US); David R. Hall, Rochester, MN (US); Kuang Yang Tu, Irvine, CA (US); and Jenghung Chen, Cupertino, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Feb. 4, 2022, as Appl. No. 17/649,999.
Application 17/649,999 is a continuation of application No. 17/346,732, filed on Jun. 14, 2021, granted, now 11,257,517.
Prior Publication US 2022/0399038 A1, Dec. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G11B 20/10 (2006.01); G11B 5/596 (2006.01); G11B 5/008 (2006.01); G11B 5/48 (2006.01)
CPC G11B 5/59666 (2013.01) [G11B 5/00852 (2013.01); G11B 5/4813 (2013.01)] 22 Claims
OG exemplary drawing
1. A data storage device comprising:
a first plurality of heads actuated by a first actuator;
a second plurality of heads actuated by a second actuator; and
control circuitry configured to:
receive a plurality of access commands, wherein each access command is associated with one of the heads;
execute a first access command using the first actuator and execute a second access command using the second actuator;
when the first access command finishes before the second access command finishes, select a third access command to execute using the first actuator based on a time remaining (To2) to finish the second access command; and
execute at least part of the second access command while concurrently executing at least part of the third access command during To2.