Hard Disk at a Glance
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Hard Disk at a Glance
Hard Disk
Presented By:
Talha Zubaer
Dept. of CSE
Daffodil International University
History• Lab Made
• Commercial Usage
• Environmental Issues
• Non-removable & Space Issues
• 1950’s-70’s
• ST-225, Western Digital, Toshiba, Hitachi.
Technology
– Stored in 0 or 1
– File Systems: 1) FAT 2) NTFS.
– Solid-state drives (SSDs)
– Shingled magnetic recording (SMR)
– Doesn’t have Operating System
– Disk Boot Failure
Types
Technically - IDE
STATA
SCSI
SAS
Normally-
1) External 2) Internal 3) Laptop HDD
Capacity
Availableo 220 Gb
o 500 Gb
o 1.2 TB
o 14 TB
Measures:o 1 mb= 1024 kb
o 1GB= 1024 mb
o 1TB= 1024 GB
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