If you’re really worried about it, and you’re sure TRIM works on your external drive, you can always sudo systemctl edit -full fstrim.timer and reduce the OnCalendar=weekly value to a more frequent interval. (Not sure if that’s still the case today.) For the longest time, Apple didn’t even enable TRIM on internal SSDs unless they were original equipment, MacOS users installing their own aftermarket SSDs had to use a trimforce command to turn it on. The potential problems are far greater than the potential issues from not having it enabled. So, continuous TRIM could severely degrade performance of non-UAS external SSDs.Īll in all, it’s just not very safe for the OS to cavalierly attempt to activate TRIM for external filesystems just because some might support it. UAS (USB-Attached-SCSI) is also required for command queueing when using USB storage, otherwise any type of TRIM commands would be non-queued. depending on the device, the system may be forced to send non-queued TRIM commands the SSD instead of queued TRIM. In this case, applying Periodic TRIM less often is better alternative. Warning: Before SATA 3.1 all TRIM commands were non-queued, so continuous trimming would produce frequent system freezes.
ENABLE TRIM ON MAC FOR SSD HOW TO
After this, the system will automatically reboot to implement trim support.Heres how to check whether TRIM is currently enabled by your system:1. The system will ask you twice to confirm the execution.
ENABLE TRIM ON MAC FOR SSD PASSWORD
As that Arch wiki page you linked to notes, In order to enable TRIM, you can open the Terminal application on your Mac, type in the command sudo trimforce enable, and then enter your admin password to activate Trim. One of the things that makes TRIM a good option for SATA SSDs is the drive’s native command queueing (NCQ). Some external drive controllers, like Western Digital’s, map the SCSI protocol UNMAP command to a SATA TRIM command, when using the USB SCSI interface, but that’s entirely dependent on support in both the OS and the external USB-to-SATA interface controller. Drive External Enclosure Support UASP Trim for SSD Size 2242/2260/2280.
How is the drive connected? An “external drive” usually means USB, and TRIM is a SATA protocol command - it’s not generically supported over USB (or FireWire). Achieving 10Gbps USB data transfer from your NVMe SSD to host PC, MacBook and. The real problem with making it a default is that there’s too much variation to make “default on” a safe choice.
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