Hard Disk

 

HARD DISK DRIVE (HDD)

 

STORAGE STOR AGE DEVICES DEVICES • One of the widely used Hardware for Storin !er"anent Data is HARD

DISK DRIVE • It is used for Storin of DATA for lon ter" use#

 

 T$!ES O% HDD HDD

PATA/IDE (PARALLEL ADVANCE TECHNOLOGY ATTACHMENT)

SATA (PARALLEL ADVANCE TECHNOLOGY ATTACHMENT)

USB/EXTERNAL HARD DISK

 

Hard Dri&e Controllers Controllers • IDE (a'a arallel ATA) • EIDE • SCSI • SATA

 

IDE HARD DISK DRIVE • IDE Hard Dis' is a * !in Conne+tor Hard Dis' and is Conne+ted to IDE

+onne+tor on ,other-oard

 

,other-oard Conne+tions

Primary IDE controller is usually faster – !"##$ %00  or %&&' econdary controller  operates at !"&&

ormally$ t*e IDE controllers Identified as IDE% and IDE2 on t*e mot*erboard

Onboard (2 x 40 pinControllers male ports)

 

I.TER.A/ !ARTS O% THE HDD

 

I.TER.A/ !ARTS0 • !/ATTER • S!I.D/E ,OTOR • HEAD ACT1ATOR • ACT1ATOR • READ23RITE HEAD • • • •

/OGIC 4OARD CO..ECTOR !O3ER S1!!/$ CO..ECTOR O1TCASI.G 4O5

 

!/ATTER • !/ATTER IS A ,ETA/IC !/ATE 3HICH IS 1SED TO STOR THE DATA I. THE

E/ECTRO,AG.ETIC %OR,# •  THE DA DAT TA IS SA SAVED VED I.  TRACK6SECTOR  TR ACK6SECTOR 7 C/ C/1STER 1STER %OR,A %OR,AT T •  THERE CA. 4E ,ORE THA. O.E !/ATTER I. A HARD DISK 

 

S!I.D/E ,OTOR • S!I.D/E ,OTOR is used to re&ol&e the !latter to a++ess the ea+h and

e&ery re&ol&i art ofn the HARD DISK  •  The re&ol&in of the latter is "easured in R!, (R!, stands for REVO/1TIO. !ER ,I.2ROTATIO.S !ER ,I.) • Current R!, ranes fro" 869** to :;6***

 

ACT1ATOR • ACT1ATOR is used to "a'e a++ess the Read 3rite Head to the e&ery

+orner of the !latter • If we +onsider the li&e e