Peralatan Penyimpan Secondary Storage Pengertian n Storage tempat

Peralatan Penyimpan (Secondary Storage)

Pengertian n Storage : tempat penyimpanan Secondary Storage Media

Tujuan n Menyimpan data dan program : n n n Permanen, tidak tergantung pada catu daya Backup, cadangan, keamanan Distribusi, memindahkan

Representasi Data n Standard representasi: n n n ASCII EBCDIC UNICODE

ASCII

Representasi biner n Biner: n data disimpan sebagai state ON = 1 n OFF = 0 n

Standard n Jumlah kode n n n ASCII = American Standard Code for Information Interchange; ASCII-8 : 8 bit = 256 chars (0 -255) EBCDIC = Extended Binary Coded Decimal Interchange Code; 256 chars UNICODE; 65536 Jika • 1 huruf diwakili 1 char, dan • 1 char ASCII-8 memerlukan tempat penyimpanan 8 bit (=1 byte), maka berapakah tempat untuk menyimpan “TI AKAKOM” ?

Satuan n n 1 Byte = 8 bit 1 Kilobyte (KB) = 1024 Byte 1 Megabyte (MB)=1024 KB 1 Gigabyte (GB) = 1024 MB 1 Terabyte (TB) = 1024 GB 1 Mega. Byte = 1, 024 x 1, 024 Bytes 1 Mega. Byte = 1, 048, 576 Bytes Kb = Kilobits KB = Kilo. Bytes bites?

Jenis n Media penyimpanan: n n n Magnetic Optical disk (Removable) Solid-state Storage Device

Magnetic n Magnetic Tape n n Sequential Access Storage Device (SASD) Magnetic Disk n Direct Access Storage Device (DASD)

Magnetic Tape n n Sequential Access Storage Device (SASD) Makin jarang digunakan, tapi masih ada dipakai untuk backup

Magnetic Disk n n Floppy disk (diskette) Hard disk

Magnetic Disk: diskette n n Bahan Bagian n n Track Sector

Floppy Disk (1) n Ukuran

Floppy Disk (2) n Formatting n n n Kepadatan rekam n n n Soft-sector Hard-sector Single Density Double Density Quad Density High Density Sisi rekam n n Single Side Double Side

Floppy Disk (3) n n Cluster : satu blok data Seandainya 1 cluster = 4 KB, maka n n n File 3 KB memerlukan 1 cluster (4 KB) File 5 KB memerlukan 2 cluster (8 KB) Standard: n n FAT 16 (DOS, Win 31, Win 95) = 32 KB FAT 32 (Win 98, XP) = 4 KB

Floppy Disk (3 a) n n Diketahui disket, free space 100 KB Seandainya 1 cluster = 4 KB Disimpan file ukuran 5 KB Free space saat ini menjadi: 92 KB

Floppy Disk (4) n High-capacity floppy disk n n n Zipdisk (Iomega) Superdisk (Imation) Hi. FD disk (Sony)

Hard Disk (1)

Hard Disk (2) n Seperti floppy

Hard Disk (3) n Seperti floppy, bahan logam

Hard Disk (4) n Seperti floppy, n Beberapa piringan, cylinder

Hard disk (5) n n Speed: rotations per minute (rpm) Capacity: Giga Byte (GB) Transfer rate: Mega bit per second (Mbps) Controller: IDE, ATA, EIDE, SATA. . .

Hard disk (6) : varian n Removable hard disk Redundant Array of Inexpensive Disks (RAID) Small Computer System Interface (SCSI)

Hard disk, removable n bracket • USB v 1. 1 data transfer 12 Mbits/sec. • Compatible with almost every 2, 5" hdd. • Hot swappable function. Included Win 98/98 se driver. Works without driver direct with Win ME/2000/XP, linux.

Hard Disk : raid 5 n n High capacity Mirroring Fault tolerant Stripping

Optical Disk

Optical Disk n n ROM : Read Only Memory WORM : Write Once, Read Many n n n CD-Recordable (CDR) Menulis CD dengan cara membakar (burn) permukaan piringan WMRM : Write Many Read Many n Re. Write CD (CDRW)

Optical Disk n CD (Compact Disk) : n n CD-ROM CD-RW mini-CD n DVD (Digital Video Disk, Digital Versatile Disk) : n n n DVD-ROM DVD-RAM

CD n n Format: CD-Audio, CD-ROM (ISO), VCD, SVCD, CD-I, . . Kapasitas: n n Mini CD: 200 MB CD : 650 – 700 MB DVD : 4. 7 GB – 17 GB Transfer rate: n n CD drive : 1 x = 150 KBps DVD drive: 1 x = 1. 32 MBps

Fluorescent Multilayer Disk n n Capacity : 20 GB – 140 GB Transfer rate : 1 GBps