Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor Control thereof Control of operating function; Driving both disc and head

GPHYSICS G11Information storage G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER

G11B19/00Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor Control thereof Control of operating function; Driving both disc and head

G11B19/02Control of operating function G11B19/022Control panels G11B19/025'Virtual' control panels G11B19/027Remotely controlled G11B19/04Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions G11B19/041Detection or prevention of read or write errors G11B19/042due to external shock or vibration G11B19/043by detecting a free-fall condition G11B19/044by using a data buffer G11B19/045by detecting mistracking G11B19/046Detection or prevention or problems due to temperature G11B19/047Recovery from power failure G11B19/048Testing of disk drives G11B19/06by counting or timing of machine operations G11B19/08by using devices external to the driving mechanisms G11B19/10by sensing presence or absence of record in accessible stored position or on turntable G11B19/12by sensing distinguishing features of or on records G11B19/122involving the detection of an identification or authentication mark G11B19/124involving the detection of diameter of disks G11B19/125involving the detection of carrier data format G11B19/127involving detection of the number of sides G11B19/128involving the detection of track pitch or recording density G11B19/14by sensing movement or position of head G11B19/16Manual control G11B19/165by closing the cover G11B19/18Manual action on one element producing control effect indirectly by consequent action of driving mechanism G11B19/20Driving Starting Stopping Control thereof G11B19/2009Turntables, hubs and motors for disk drives; Mounting of motors in the drive G11B19/2018Incorporating means for passive damping of vibration, either in the turntable, motor or mounting G11B19/2027Turntables or rotors incorporating balancing means; Means for detecting imbalance G11B19/2036Motors characterized by fluid-dynamic bearings G11B19/2045Hubs G11B19/2054Spindle motor power-up sequences G11B19/2063Spindle motor power-down sequences G11B19/2072for the reduction of power consumption during idle time G11B19/2081emergency power-down G11B19/209in multiple disk arrays G11B19/22Brakes other than speed-regulating brakes G11B19/24Arrangements for providing constant relative speed between record carrier and head G11B19/247using electrical means G11B19/253using mechanical means G11B19/26Speed-changing arrangements Reversing arrangements Drive-transfer means therefor G11B19/265Friction wheel drive G11B19/27Belt drive G11B19/275Gear wheel drive G11B19/28Speed controlling, regulating, or indicating