(N23) PC Hardware part4 HDD and SSD , MBR and GPT, Disk Management
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Hard Disk
Uses Magnetic Media for Storing Data
Non-Volatile Permanent Storage Device
Mass Storage Device
Interfaces Used
IDE / EIDE --PATA
SATA
ATA – Advanced Technology Attachment
PATA – Parallel ATA -40pin - ribbon
SATA – Serial ATA 7 pin – single wire
SATA is faster than PATA
SATA III – 6Gbps
IDE/PATA hard disk
SATA Hard Disk
Internal HDD - 3.5in , 2.5in
3.5in – Desktops
2.5in – Laptops, Mini PC
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External HDD - Backup, Storage Data (which not required to be in PC)
(320GB, 1TB, 2TB) – transfor heavy data
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SSD - Solid State Drive
-NAND memory
-data stores in chips
-HDD data stores in Platter
-Non volatile
-light weight - carry easily
-easy to transport
-less power consumption
-small size
-high speed -read and write , transmission
-Suitable for Operating system and Application - faster booting , faster app loading
-Not suitable for storing regular data - we can store but SSD is costly
-costly
-compare 1TB HDD – 1TB SSD
NAND SATA SSD
-connecting to SATA interface on MB
-Read and Write speeds up to 540MB/s and 500MB/s
NAND NVMe M.2 SSD
-faster than SATA SSD
-costly
-Inserting into motherboard like RAM or CPU
-reads or writes up to 2400MB/s – 1900MB/s
MBR and GPT - Partition Styles
When a fresh/new disk drive connected system ask for initialize as MBR type or GPT type
When we install OS in fresh PC/System – OS and MotherBoard are BIOS firmware – Disk initialize as MBR
MotherBoard – UEFI firmware and OS is latest (uefi support) – Disk initialize as GPT
MBR: Master Boot Record
4 Primary partitions
3 Primary partitions and 1 extended partitions
1 extended –multiple no of logical drives
Partition Size support – up to 2TB
GPT:GUID Partition Table
128 Primary partitions
No extended- no logical drives
Partition Size : more than 2TB, Up to 18EB
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