Samsung SSD Drive in MacBook Pro
What is SSD?A solid-state drive (SSD) is a data storage device that uses solid-state memory to store persistent data. An SSD emulates a hard disk drive interface, thus easily replacing it in most applications. An SSD using SRAM or DRAM (instead of flash memory) is often called a RAM-drive.
With no moving parts, solid-state drives are less fragile than hard disks and are also silent (unless a cooling fan is used); as there are no mechanical delays, they usually employ low access time and latency.
SSDs have begun to appear in laptops, although as of 2009 they are substantially more expensive per unit of capacity than hard drives (US$500 for a 256 GB SSD, vs. US$50 for a similar size external USB HDD).
Video: SSD vs HDD
With no moving parts, solid-state drives are less fragile than hard disks and are also silent (unless a cooling fan is used); as there are no mechanical delays, they usually employ low access time and latency.
SSDs have begun to appear in laptops, although as of 2009 they are substantially more expensive per unit of capacity than hard drives (US$500 for a 256 GB SSD, vs. US$50 for a similar size external USB HDD).
Video: SSD vs HDD
Comparison with hard disk drives
Advantages:
- Faster start-up
- Fast Random Access
- No Noise
- Low Power Consumption
- High Mechanical Realiability (coz of lack of moving parts, it's endure extreme shock, high altitude, vibration, extreme tempreture
- When failures occur, they tend to happen predominantly while writing, or erasing cells, rather than upon reading cells. With magneto-mechanical drives, failures tend to occur while reading. If a drive detects failure on write operations, data can be written to a new location. If a drive fails on read, then data is usually lost permanently
- Costly
- Lower capacity
- Slower writing speed
p/s: You can find this type of hardisk in Apple MacBook (certain model) and the tiny Acer Aspire One (if they do not change the original SSD drive to HDD)..
Sources:
wikipedia
macenstein
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