Actually the TRIM command can be thought of as a message from the OS about what previously used addresses on the SSD are no longer holding valid data. It is not a command that forces the SSD to immediately erase data like some people believe. The SSD cannot tell what files have been deleted until the OS uses the same sectors to store new files, but by that time the SSD has already wasted cycles by garbage collecting data that was invalid, but known to the SS.ĭid you know HDDs do not have a Delete command? That is why SSDs need TRIMĪ number of years ago, the storage industry got together and developed a solution between the OS and the SSD by creating a new SATA command called TRIM. The TRIM command is sent by the OS to the SSD to identify what pages of data can be ignored during garbage collection. I talk about how TRIM came into existence and why it is necessary in my blog …. TRIM is beneficial to all SSDs regardless of what kind of garbage collection is used. Foreground GC is harder to achieve and I believe only the SandForce controller is able to do it today In simple terms background garbage collection will increase write amplification (WA) and wear out the SSD sooner. The difference between them is covered in my blog. Some use foreground GC and some use background or idle-time GC. The newly erased block of blank pages is then ready to save new data.Īll NAND Flash-based SSDs use GC. But first all surrounding pages with valid data must be read and then rewritten to blank pages. Random writes put the new data in previously erased pages elsewhere, peppering a block of valid data with “patches of invalid data.” In order to write new data to these patches, the whole block – all 128 pages – must be erased. The complexity of writing data really starts to escalate in the case of random writes replacing previously written data. But a page can only be erased within a group of typically 128 pages called a block. Once a page is written, it cannot be rewritten until it is erased. Trim can be considered an aid to garbage collection.įor the short explanation flash memory is organized in groups of pages where data can be written. OCZ SSDs use a Sandforce controller which has built in foreground garbage collection that delays the need to erase blocks, reducing but not removing the need for TRIM support. System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage.original
$sudo cp /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage You can also enable trim manually by looking for all 'Apple' occurrences in the file and patching them in a hex-editor or via terminal: #1. Which checks if the ssd is a 3rd-party or Apple Branded SSD:
Note: You may experience issues trying to activate older versions of Trim Enabler on older versions of macOS.The Trim Enabler patches the following Kext-File /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage If you are unable to locate your order email, send us an email at and include either one of:Īnd we will send you a Trim Enabler 3 license. It will be included under the "Instructions" section further down in the email. If you purchased Trim Enabler 4 and need a Trim Enabler 3 license, please check the order email you received from Paddle.
CINDORI TRIM ENABLER LICENSE
You can not use your Trim Enabler 4 license to activate it.
CINDORI TRIM ENABLER DOWNLOAD
The Trim Enabler 2 download does not require a license key, but for Trim Enabler 3 you must request a secondary license from us. The link to download these versions will be in your order email, but you can also get them here: Download Trim Enabler If you purchase Trim Enabler 4, you will receive access to the older Trim Enabler 2 and Trim Enabler 3 as well.
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