Author Topic: ~ Things to know about Hard disk drive and Solid state drive!  (Read 1950 times)

Offline MysteRy

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« Last Edit: November 07, 2018, 11:12:23 AM by MysteRy »

Offline MysteRy

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Re: ~ Things to know about Hard disk drive and Solid state drive!
« Reply #1 on: June 29, 2018, 09:39:45 PM »
« Last Edit: November 07, 2018, 11:14:16 AM by MysteRy »

Offline MysteRy

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Re: ~ Things to know about Hard disk drive and Solid state drive!
« Reply #2 on: June 29, 2018, 09:40:38 PM »
« Last Edit: November 07, 2018, 11:14:58 AM by MysteRy »

Offline MysteRy

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Re: ~ Things to know about Hard disk drive and Solid state drive!
« Reply #3 on: June 29, 2018, 09:42:21 PM »



HDD Advantages:

1. More affordable:
• One of the primary advantages of a hard disk drive is that it is more affordable in terms of per gigabit.
• This means that desktop or laptop computers with hard disk drives are considerably cheaper.
• External HDDs are also cheaper.

2. Higher storage capacity:
• Another advantage of a hard disk drive is that this storage system is available at varying storage capacity options—usually at a higher base capacity.
• 500GB HDDs have now become a standard storage capacity for computers and external drives.
• The availability of more computers and external drives sporting 1TB HDDs is promoting a new standard for storage capacity.

3. Easier to buy in most stores:
• There is an abundance of internal or external hard disk drives in the market.
• Individuals who want to upgrade their computers or want to buy an external media storage to backup their data would find it more convenient to oft an HDD instead of an SSD.

4. Longer lifespan:
• Longevity in terms of read-and-write cycle is another worthy advantage of hard disk drives.
• The flash memories of a solid-state drive can only be used for a finite number of writes.
• An SSD cannot write a single bit of information without first erasing and then rewriting very large blocks of data at one time.
• As each cell goes through this cycle, it becomes more useless.

5. Large storage capacity:
• Typically around 500Gb and 2TB maximum for notebook size drives;
• 10TB max for desktops.
« Last Edit: November 07, 2018, 11:15:55 AM by MysteRy »

Offline MysteRy

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Re: ~ Things to know about Hard disk drive and Solid state drive!
« Reply #4 on: June 29, 2018, 09:44:40 PM »



HDD Disadvantages:

1. Slower average speed:
• Different variants of hard disk drives have different read and write speeds—depending on their respective RPM or rotation per minute specification.
• HDD is prone to fragmentation of data because of its rotary recording surface.

2. Higher power consumption:
• Another disadvantage of a hard disk drive is that it consumes more power.
• The storage device basically needs more power input to rotate the metallic platter and move that magnetic read head.

3. Produces noise while in operation:
• The spinning of the metallic platter and the back-and-forth movement of the magnetic read head create mechanical noises while a hard disk drive is in operation.
• Both spin and movement also create subtle vibrations. This is more noticeable during boot or whenever a user is storing large files.

4. Not durable compared to other:
• One great disadvantage of a hard disk drive is that it is more prone to integrity failure or data loss and overall device corruption.
• The movable mechanical parts of an HDD make it physically vulnerable to mechanical damages due to drops and shudder.
• For example, the close spacing between the read head and the metallic platter makes HDD prone to scrapes across the platter as the head grinds the thin magnetic coating.

5. Bulkier form factor:
• Another disadvantage of a hard disk drive is a bulkier form factor.
• There is a limit on how small HDDs can be manufactured because of the need for a rotating metallic platter and a moving read head.
• This makes HDDs not suitable for mobile computing devices such as laptops.
« Last Edit: November 07, 2018, 11:16:30 AM by MysteRy »

Offline MysteRy

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Re: ~ Things to know about Hard disk drive and Solid state drive!
« Reply #5 on: June 29, 2018, 09:47:25 PM »
« Last Edit: November 07, 2018, 11:16:57 AM by MysteRy »

Offline MysteRy

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Re: ~ Things to know about Hard disk drive and Solid state drive!
« Reply #6 on: June 29, 2018, 09:48:46 PM »
« Last Edit: November 07, 2018, 11:17:13 AM by MysteRy »

Offline MysteRy

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Re: ~ Things to know about Hard disk drive and Solid state drive!
« Reply #7 on: June 29, 2018, 09:51:35 PM »



SSD Advantages:

• High performance – siginificantly faster than a standard HDD
• Faster seek time – upto 60x faster than HDD
• Higher reliablity – no moving parts,can withstand 1500Gsoperating shock
• Lower power – Lesser power consuption ,cooler operation
• Silent operation – ideal for post production enviornments
• Lighter weight – perfect for portable devices
• Wider operating Temp. - 0c – 70c
« Last Edit: November 07, 2018, 11:18:06 AM by MysteRy »

Offline MysteRy

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Re: ~ Things to know about Hard disk drive and Solid state drive!
« Reply #8 on: June 29, 2018, 09:57:25 PM »



SSD disadvantages:

1.Solid State Disk Disadvantages Higher cost as compared to magnetic disk storage

2.Increased failure rate
• Most cells can only be written to ~ 100,000 times before that cell is no longer functional

3.Wear leveling
• This is used to evenly distribute writes to all flash cell in the disk.
Enables the drive to support number of writes =
(# of writes a cell can sustain) x (# of blocks on the disk)
• Accomplished by maintaining a logical block map inside the SSD device
• Logical block map creates a High internal storage overhead
« Last Edit: November 07, 2018, 11:19:01 AM by MysteRy »

Offline MysteRy

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Re: ~ Things to know about Hard disk drive and Solid state drive!
« Reply #9 on: June 29, 2018, 10:02:18 PM »
« Last Edit: November 07, 2018, 11:19:34 AM by MysteRy »