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Not true, there are actually TWO critical issues discovered so far with the EVO drives, one Linux related, the other NOT. Some users are insisting the problem is only with Linux, and you don't need a firmware update. There is a lot of confusion about the multiple issues with the Samsung and the need for firmware update. #CINDORI TRIM ENABLER INSTALL#Review of Cindori's website (as Mike linked to in the first post) suggests Cindori is working on an update to Trim Enabler that will simplify the periodic approach to using Trim.IF YOU OWN A SAMSUNG EVO OR EVO PRO, 840 OR 850, be sure to install the latest firmware before turning on TRIM support This is the approach used by some who prefer to avoid the issues related to Kext Signing under Yosemite that Mike so kindly guides us through in his first post. If the drive you want to Trim is your boot drive, you must boot from a separate drive, and Trim must be enabled in the OS on that separate drive before you run the Repair Disc operation. If you have been using a non-OEM SSD for a while without Trim enabled, it is a good idea to run a Repair Disc operation in Disc Utility, which will Trim all data that was erased before Trim was enabled. Although Trim is clearly not required to use SSDs, those who question its usefulness might well ask why Apple enables it for all of their OEM SSDs. #CINDORI TRIM ENABLER MAC OS#Apple OEM SSDs do not require Trim to be enabled, as Mac OS does not block Trim for Apple OEM drives. unblocked for non-Apple OEM SSDS) under any version of Mac OS it is a continuous, automatic process. Privately, engineers shake their head at the irresponsible nature of what certain outfits will do to keep the $19.99 upgrades and $39.99 new orders coming in. Publicly, Micromat and others only say that their defragmenting routines will not run if an SSD is detected – and I can confirm that they don't. This is why Alsoft never came out with an OS X version of theirs that I used religiously in OS 7 – they agreed with Apple but said it didn't do any harm, either (they told me this when I asked years ago). Even though I defrag mine every other year or so, I'm pretty sure they're right. This lowers the chance that a accidentally deleted file can be recuperated.Īccording to Apple, fragmentation isn't an issue with mechanical hard drives either. On a SSD, the wear leveling action of frees up cells to be written without erasing the cells first. Again, defragmenting is counterproductive to wear leveling and shortens lifetime and speed.Ī curious other difference between SSD and HDD: when on a HDD a file is accidentally deleted, this file can be recuperated as long as the space is not being rewritten. Apple OSX has it only for Apple built-in SSDs. #CINDORI TRIM ENABLER WINDOWS 7#Windows 7 and higher have a TRIM command in the OS that does the same thing even more efficiently. A file deletion does not empty the cell, which is necessary for being able to be written. SSD controllers have a system of freeing up deleted file cells in the spare time between disk actions. This is why write takes much more time than a read. The cell has to be freed up to accept a new file being written (on a magnetic disk a deleted file is not erased but simply overwritten). #CINDORI TRIM ENABLER FREE#Also the "cells" only have a certain maximum of write cycles: demanding a need for "wear leveling" over all cells on the SSD: Again, defragmenting shortens the lifetime because the cells adjacent to each other are repeatedly stressed more than the free unused cells.Ī deletion of a file does not result in freeing up cells, contrary of magnetic disks. ![]() Defragmenting causes loss of efficiency and speed. Writing takes longer and longer: writing causes a block of 64k to be freed before writing even when you only need to write a small file. BTW, you mean heavy fragmentation of files in an SSD drive will have no effect at all? Correct and no one who knows about these is saying anything differently. ![]()
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