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Ch 5 95

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Jecka Cortez
Jecka Cortez

The document discusses various types of external memory used in computer systems, including magnetic disks, optical disks, magnetic tape, and RAID (redundant array of independent disks). Magnetic disks come in varieties such as hard disks, floppy disks, and removable hard disks. Optical disks discussed include CD-ROM, CD-R/W, DVD, and their uses, capacities, and read/write capabilities. RAID systems provide data redundancy across multiple disks for reliability and performance.

Technology
1 of 37
William Stallings Computer Organization and Architecture Chapter 5 External Memory
Types of External Memory ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Magnetic Disk ,[object Object],[object Object],[object Object],[object Object],[object Object]
Data Organization and Formatting ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Disk Data Layout
Fixed/Movable Head Disk ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fixed and Movable Heads
Removable or Not ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Floppy Disk ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Winchester Hard Disk (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Winchester Hard Disk (2) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Removable Hard Disk ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Finding Sectors ,[object Object],[object Object],[object Object],[object Object]
ST506 format (old!) ,[object Object],[object Object],Gap1 Id Gap2 Data Gap3 Gap1 Id Gap2 Data Gap3 Track Sync Byte Head Sector CRC Sync Byte Data CRC
Characteristics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Multiple Platter ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Speed ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 0 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 3 ,[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 4 ,[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 5 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Optical Storage CD-ROM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CD-ROM Drive Speeds ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Comparison of Disk Layouts
CD-ROM Format ,[object Object],[object Object],[object Object],00 00 FF x 10 Min Sec Sector Mode Data Layered ECC 12 byte Sync 4 byte Id 2048 byte 288 byte 2352 byte
Random Access on CD-ROM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CD-ROM for & against ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Other Optical Storage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
DVD - what’s in a name? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
DVD - technology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
DVD - Writable ,[object Object],[object Object],[object Object],[object Object]
Foreground Reading ,[object Object],[object Object]
Magnetic Tape ,[object Object],[object Object],[object Object],[object Object]
Digital Audio Tape (DAT) ,[object Object],[object Object],[object Object],[object Object],[object Object]

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Ch 5 95