MLC SSD, with in-volume is 3,000 times P/E

What is a solid state drive and how long is the SSD life?

SSD refers to the use of flash memory chip composed of SSD SSD, is the use of flash flash memory particles as a storage unit, no longer using traditional mechanical storage methods, the use of simulated virtual hard disk access and sectors, etc., can also simply understand the SSD is a drive interface (sata/ ATA, etc.) "Big u Disk", unique is no mechanical structure, the use of traditional NAND flash features, block write and erase the way to read and write, so in the efficiency of reading and writing, very dependent on the development of Flash technology, compared with traditional mechanical hard disk, with low power, earthquake resistance, high stability, Low temperature and other advantages of solid-state drive benefits.

2. Flash-based solid-state drives

   Flash-based solid-state drives (IDE flash disk, Serial ATA flash disk): Flash chips are used as storage media, which is what we typically call SSDs. Its appearance can be made into a variety of shapes, such as: Notebook hard disk, micro hard disk, memory card, USB and other styles. The best advantage of this SSD is that it can be moved, and the data protection is not controlled by power, can adapt to a variety of environments, but the service life is not high, suitable for the use of individual users.

4. DRAM-based solid-state drives

   The benefits of DRAM-based SSDs: using DRAM as a storage medium, the application scope is narrow. It mimics the design of traditional hard drives, can be set up and managed by the filesystem tools of most operating systems, and provides an industry-standard PCI and FC interface for connecting to a host or server. The application method can be divided into SSD hard disk and SSD hard disk array two kinds. It is a high-performance memory, and the service life is very long, in the ointment is the need for independent power supply to protect data security.

6. SSD SSD Benefits

   The benefits of 1.SSD SSDs are 20-30 grams lighter than conventional 1.8-inch hard drives, and can be used extensively on portable mobile products such as laptops and GPS.

   2. Durable, shock and anti-fall. Because all flash chips are used, the benefits of SSD are not affected by high-speed movement even with rollover tilt, and the possibility of data loss can be minimized if the laptop is accidentally dropped or collided with a hard object.

   3.SSD SSD Operating noise value is 0 db. With no mechanical parts and flash memory chip smaller heat, fast cooling and other characteristics.

   4. Data access speed is fast. Microsoft's next-generation operating system Windows Vista supports a technology called ReadyBoost ... This technology can reduce read delays to a minimum by reducing the number of times common software calls from slower mechanical hard drives via flash memory. This technology can be said to be prepared for SSDs.

8. SSD SSD Benefits Shortcomings

   1. Higher prices hinder the popularity of SSD SSDs, which cost more than a few or even dozens of times times more than the same capacity of mechanical hard drives.

   The benefits of a 2.SSD SSD are small, and currently 500GB to up to a terabyte of hard drives, while SSD SSDs have the highest capacity for low volume.

   3. Lack of support for end devices is another major issue facing SSD SSDs.

10. solid-state drives have a short lifespan?

    SSD Flash has a problem with the number of write-down limits, which is what many people have criticized for their short lifespan. Flash memory is completely erased once called 1 times P/E, so the life of the flash memory is in P/E units. 34NM of flash memory chip life is about 5,000 times p/e, and 25nm life is about 3,000 times p/e. Does it seem to have a shorter lifespan? This is theoretically true, but with the upgrade of the SSD firmware algorithm, the new SSD can provide less write-in volume. A specific example, a 120G SSD, to write 120G file is counted as a P/E. Ordinary users boast normal use, even if the daily write 50G, the average 2 days to complete a P/E, then 180 times a year P/E. You can calculate your own 3,000 P/E can be used for a few years, I believe that at that time, solid-state drive has long been replaced by you other novelty.

The lifespan of a solid-state drive is determined by the type of flash memory and the amount of write.

1, the General MLC Solid-State Drive, the most extensive, and the amount is 3,000 times p/e, that is, the cumulative write full 3,000 times. Assuming that a 128G SSD is written to 40G per day (which is impossible for a typical home user), it can be used for more than 20 years.
2, TLC Life, is the MLC half or One-third. This means that life expectancy is shortened by three times times.
3, the life of SLC, is 10,000 times P/E, is more than three times times the MLC.


The advantages of SSDs are: The biggest is the speed, seismic, and so on
Disadvantages are expensive, limited capacity, long life (limited number of read and write)

Mechanical hard disk advantages are: Large capacity, low price, long life
The disadvantage is: fear of vibration, the most deadly is read and write too slow!

A hybrid drive is a cache of SSDs on the board of a mechanical hard drive, which increases the speed of the hard drive.
It's a combination of 2 people!

MLC SSD, with in-volume is 3,000 times P/E