What you need to know about SSD-drives from the perspective of employees repair centers

Who else but the staff repair centers, to know all the features of the SSD-drive. Therefore, the editor of "MakRadara" picked up the phone and phoned a few points of the top ten Google SERPs. During the conversation with the masters succeeded in formulating three basic rules for the use of SSD.

Typically 25 per cent

Rule one: 25% of the SSD-drive should be left blank. For example, you bought a SSD of 120 GB. About 10 gigabytes will be spent on OS, still approximately 25 gigabytes should remain empty. We get 82.5 gigabytes. This is the disk space that we can use. It's great, right? Buy the disc with 120 gigabytes, and can only use 82.5. Why is this?

"If the disk is full score data, such as movies, music and leave free, say, 5-10 gigabytes, the drive will" rebate ", - says Nikita Provorotov the company ON-PC.ru. - It happens to discs of any companies: INTEL, Silicon Power, ADATA and so on. Therefore, we recommend 15-25% of disk space to leave free. "

"Rule of 25% can be considered empirically useful, - says the well-known Russian specialist in data recovery

Ilya Seidel. - The greater the intensity of the recording and dubbing to the SSD, the more empty space should be left. What is more important: Avoid strong heating of solid state drives. Reliability flash memory decreases with increasing temperature. SSD controller takes this into account, but why complicate his life? And, of course, do not keep on the SSD frequently updated data in auto mode, for example, 1C base. If this industrial need, then take PRO-class drive and check the daily volume record with the manufacturer's specifications. Then the warranty will be in effect. "

Fall speed filled under the SSD-drive eyeballs due to the feature of the memory cells. Each information block is 512 kilobytes, and there may be placed, for example, only one page size of 4 kilobytes. But while the entire block of information will be considered busy. Unlike the HDD, in which the new data can be added to existing or overwrite the old data in the SSD is first read, and then written to the new. This leads to a slowing down of the speed. To maintain the SSD-drive speed, it is necessary to regularly "clean debris", and for this there is a TRIM function.

rule TRIM

SSD-drive cells are filled with blocks of data and require pre-treatment before the new record information. Special TRIM command tells SSD controller that the data is in different locations were actually removed by the user and no longer needed. During pauses controller in advance to cleanse the cells, that is simply "take away the garbage" from the data. This has a positive effect on the drive speed and the period of his life. Last update OS X 10.10.4 added TRIM support for third-party SSD-drives. To enable it, you need to "Terminal", enter the command sudo trimforce enable and restart the computer. TRIM is enabled.

rule backup

"Recover data from SSD-drive depending on the model, and is not always possible, - says Valery Dorogavtsev the company MHDD.ru. - If the disc 3 SandForce controller is installed - and that Intel's latest drive models, OCZ, Kingston - then with great certainty we can say that the information can not be restored to them. "

"99.99% of the disks on the controller SandForce not restored - emphasizes Vlad barchan the company DATARC. - If you use the discs on the Marvell controller, for example, the Plextor company, the more often the information can not recover. "

"SandForce controllers use hardware-based encryption - explains Paul Khoruzhiy the company FixInfo. - In theory, any encryption can be cracked, but because it uses a 256-bit key on, the cost of hacking is very big. Therefore, they say that retrieve information from the SSD-disk is impossible. "

"The easiest way to restore archived data, - specifies Nikita Provorotov. - The fact is that when you create an archive prescribed recovery code, and later with the help of the historian can correct errors with less loss of the packed data. "

And finally - a recommendation of the respondents masters service center: always make a backup. Unlike the HDD, which can can "die" for a long time, SSD break suddenly and forever.