Two aspects are central to the decision for a hard disk : the storage space, so to speak, the size of the disk. It is lower in modern SSD than in the classic HDD. Equally important is the reading and writing speed . With an SSD you should not take less than 500 mb/sec.
Purchase advice: How to find the right SSD hard disk in 2019
- Much faster, quieter and considerably more energy-efficient : that’s the SSD compared to the HDD.
- Flash technology can be used to produce mass storage devices that no longer contain moving parts.
- While HDDs have reached their physical limits in terms of size, we can expect gigantic increases in SSDs.
Let’s imagine a conventional hard drive. It’s not unlike a classic turntable. Suppose the record has no grooves, but magnetic fields that can be charged or discharged, and the tonearm can automatically move back and forth – then we are very close. To save something on this record, we let it spin quickly and the tone arm moves back and forth until all the data is stored.
And: Actually, the plate could indeed be magnetizable on both sides, we take two Tonarme, one above and one below – so the whole thing would be twice as fast. If we now imagine a stack of plates with spaces in between, where the tonearms can write and read data, then the picture is complete. In principle, a classic hard disk drive has the same structure .
The SSD, Solid State Disk, consistently continues this thinking model – the notion that we have such a large stack of disks that virtually every storage sector has its own read and write head. Then the plate does not have to turn anymore and the ‘tonearm’ will not move anymore. And every sector could theoretically be addressed at the same time . That’s the principle of the SSD.
The pros and cons of the advanced SSD:
- More quickly
In the table we list the main differences between HDD and SSD:
Faster, lighter and quieter
Lower power consumption
1. Dive into the technical background of the SSD
1.1. The basic structure
SSDs use so-called flash memory instead of rotating disks. Flash memory has been around for a long time. Even the old game cartridges from the Atari VCS had so-called EPROMs (erasable programmable read-only memory), which in turn are nothing more than an array of MOSFET transistors. A modern flash drive is just that, even in 2018.
The specification of the VCS provided for a maximum memory size of 4 kilobytes. To imagine the capacity: The memory of an Atari cartridge would fit 360 times on a floppy disk – and over five and a half thousand floppy disks fit on a smartphone with 8 GB of memory.
So we’re at the bottom of why we did not have SSDs much earlier: the price per unit of storage . The technology was already there. As early as 1985 flash memory hard drives were installed in PCs of the American military. But private people could never pay them.
1.2. The structure of today’s SSDs
Today’s SSDs are the result of constant development. Before the first EPROMs had to be erased with a UV lamp before they could be rewritten, soon there were electrically erasable components. These were called EEPROM and were only to be used for about 200 deletions, so for a hard drive still completely unsuitable. Fortunately, the technology has evolved faster, and thus cheaper than the memory requirements for typical applications grown.
So the technology was also affordable for home use . Today, 1 TB SDDs are not uncommon – that’s just under 700,000 floppy disks. And – depending on the storage method – over 100,000 write and delete operations are possible.
1.3. The extension of a bit to several levels
A memory cell has always been a unit that could assume one of two states, charged or not, also referred to as “logical one” (1) or “logical zero” (0). Now, always on the quest to cut costs, industry has developed memory devices that allow one of several states to be adopted.
For example, there is the TLC (Triple Level Cell) technology. These memory cells can assume three states , plus the condition of not having a state – that is, the value of logic zero.
So that fits a multiple of information on the same amount of memory , as is the case with SLC, the single level cells. Currently, TLC storage is only about one-tenth as long as SLC, is much slower, half the size, and about 25% cheaper.
1.4. Standard SSDs
SSDs are available in a variety of formats – meaning the physical size that an SSD occupies as an internal hard drive in a PC or laptop. The most common format is 2.5 inches .
In netbooks and ultrabooks even smaller SSD hard drives are installed. Such notebook SSDs have a width of 1.8 inches. Connected SSD hard drives with 2.5 inches internally via the SATA port. This stands for Serial AT Attachment.
SSD hard drives for 1.8 “laptops use a smaller format, the mSATA – for mini-SATA. Therefore, these hard drives are often called mSATA SSDs. All have in common that they are much faster than conventional HDDs – Hard Disk Drives. Thus, the operating system is often loaded in just a few seconds and the speed advantage is also noticeable in gaming.
Here are the established brands and manufacturers for SSDs at a glance:
- Angel Bird
- Hewlett-Packard HP
- Micro Storage
1.5. So the manufacturers deal with the weaknesses of the SSD
SSDs are praised for their speed, light weight, and the fact that they have no moving parts . But there are also disadvantages: the aforementioned price, which is many times higher than conventional SATA hard drives and the short life. In order not to let the SSD hard drive advantages in everyday life displace the disadvantages, there are tricks. For example, there are laptops that have SSD and HDD drives installed. Here the operating system is installed on the – usually much smaller – SSD.
So programs are loaded as fast as possible, but above all, the boot process is extremely accelerated. A 2 terabyte hard drive (HDD) is not expensive in terms of price, so an additional HDD is built in to store mass data.
SSD Disk Wiki: If you want to learn more about SSDs, visit the free encyclopedia Wikipedia page.
2. Buy SDD hard drive
2.1. Prices for SSDs
With this background information, we can now confidently begin with the purchase advice. For you, this means worrying about storage needs and budget. A 1TB SSD hard drive is available for between $250 and $350.
For a 500GB SSD hard drive, the price will be between $100 and $200, with prices heading lower . You’re likely to find a Samsung SSD called ‘Evo’ in your search.
The Evo is a very fast SSD hard drive, perhaps the fastest, perhaps best, SSD among TLC disks. Manufacturer Samsung runs a part of the TLC cells in SLC mode. These then work much faster and serve as an intermediate buffer. So the Samsung Evo felt as fast as a single-level Cell SSD .
2.2. External SSD hard drive
If you are looking for an external hard drive, our recommendation is: Take a ‘normal’ HDD. The speed advantage of an SSD is nullified by the USB port on mobile hard drives. Also, the power consumption and noise are no problem, because the external HDD, unlike internal SSD hard drives, only occasionally in use. This constellation is definitely cheaper than the cheapest SSD.
4. Short summary
- What is an SSD hard drive?
The latest generation of mass storage, based on flash technology, rather than magnetic disks.
- How do I install an SSD hard drive?
There is no difference between SSD hard drives and HDDs. If they have the same format, the screw holes are in the same place.
- What does SSD hard drive mean?
It is a mass storage device with flash memory called Solid State Disk.
- SSD hard drive: what do you have to consider?
If you want to use the SSD normally, you can safely choose the brand that you prefer. The category – whether TLC or SLC – is then only a matter of budget. Let the tests guide you.