Peralatan Penyimpan (Secondary Storage)

Pengertian Storage : tempat penyimpanan Secondary Storage Storage Media

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

Representasi Data Standard representasi: ASCII EBCDIC UNICODE

ASCII

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

Standard Jumlah kode 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 bites? 1 Byte = 8 bit 1 Kilobyte (KB) = 1024 Byte 1 Megabyte (MB)=1024 KB 1 Gigabyte (GB) = 1024 MB 1 Terabyte (TB) = 1024 GB bites? 1 MegaByte = 1,024 x 1,024 Bytes 1 MegaByte = 1,048,576 Bytes Kb = Kilobits KB = KiloBytes

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

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

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

Magnetic Disk Floppy disk (diskette) Hard disk

Magnetic Disk: diskette Bahan Bagian Track Sector

Floppy Disk (1) Ukuran

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

Floppy Disk (3) Cluster : satu blok data Seandainya 1 cluster = 4 KB, maka File 3 KB memerlukan 1 cluster (4 KB) File 5 KB memerlukan 2 cluster (8 KB) Standard: FAT16 (DOS, Win31, Win95) = 32 KB FAT32 (Win98, XP) = 4 KB

Floppy Disk (3a) 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) High-capacity floppy disk Zipdisk (Iomega) Superdisk (Imation) HiFD disk (Sony)

Hard Disk (1)

Hard Disk (2) Seperti floppy

Hard Disk (3) Seperti floppy, bahan logam

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

Hard disk (5) 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 Removable hard disk Redundant Array of Inexpensive Disks (RAID) Small Computer System Interface (SCSI)

Hard disk, removable bracket USB v1.1 data transfer 12Mbits/sec. Compatible with almost every 2,5" hdd. Hot swappable function. Included Win98/98se driver. Works without driver direct with Win ME/2000/XP, linux.

Hard Disk : raid 5 High capacity Mirroring Fault tolerant Stripping

Optical Disk

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

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

CD Format: CD-Audio, CD-ROM (ISO), VCD, SVCD, CD-I, .. Kapasitas: Mini CD: 200 MB CD : 650 – 700 MB DVD : 4.7 GB – 17 GB Transfer rate: CD drive : 1x = 150 KBps DVD drive: 1x = 1.32 MBps

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