background) disk -> many platter// platter 위아래 -> RW head // cylinder : 같은 트랙 번호 위치를 묶은 것1 platter -> many track , 1 track -> "" sector Transfer rateSeek time : Head seek-> track rotational latencyHead crash : Head -> platter와 닿음 // N ns~us float NVM (NonVolatile Memory) // Disk// SSD : NVM NAND Flash 기반 같은 장소에 overwrite X ..
