VANGO(VL40) SAMSUNG HARD DISK DRIVERETAINERRING Component could fix bearing when inserted to ARM.RLL Encoding method "run length limited data" to magnetic pulse.It can store data 50% more than MFM(Modified Frequency Modulation) method.RMA Return Material AuthorizationROMSearching only memory. memory would not erase during off, so we use this to program or dataneed not change in PC. Mask ROM input contents when it's manufactured and PROM recordedprogram by user.RootDirectory The place where file on disk and sub directory list.RotationalLatencyTime which controller find proper data with track rotating, head read/write. Generally 1/2 of fullrotation hour.RPM Revolution per minute. RPM is higher. the data searching speed is getting higher.SCSISmall Computer Systems Interface. IDE drive can put only 2 drives on the same bus (4 drivesin case of Enhanced IDE), SCSI can put 8 drives on the same bus. Also it can be connectedHDD and other various device,CD-ROM, Tape drive, Printer etc. as well. 16 bit Fast SCSI cantransfer data in 20Mb speed per second. Apple Macintosh and UNIX operating system usemainly.Sector Minimum classification unit which assigned by drive to store information.Seek Moving read/write head to the particular data track.Seek time Time which head is located the current post move to another head written information should beread.Server Computer and device to produce every server to PC on PC LAN network.Servo ? Control system in feed-back way to move the accurate location in device,@ Signal recorded pattered disk in every side to be capable of HEAD location controlling.Servo Data Magnetic marking written within media enable to move read/write head to accurate location.SERVO-WRITER Servo information recording equipment on HDA assembled.Settle time Time which head read/write the real data after arriving on proper track.ShockRating Enduring number without disk drive damage.(G unit) It is differ according to run/unrun number.,Slave In case, several PC is connected to one PC, the rest drives except booting system(C:)Slider The core part of head ass'y, made for head can surface on disk, it's organized ABS, Core, Coilin general.SMART Self-monitoring, Analysis and Reporting Technology. Technology of reporting the HDD innerstatus and analysis to Host.SPC Statistical Process Control.Spindle Center shaft of drive connected hard disk platter.Spindlemotor Motor enable to rotate disk in continuous speed. (high speed:4500rpm,5400rpm etc)SSA Serial Storage Architecture. High speed and high efficiency interface technology of IBMcorrespond to Seagate's FC-AL interface.Track HDD have numerous circles in media, and these circles write data, we call this circle track.Trackdensity Track density (attachment: TPI)