![]() That command will unmount all volumes on that drive in case you have multiple volumes/partitions on it. You can use the following command to unmount the external SSD, but make sure to replace "diskN" with the appropriate disk identifier for the external SSD which you can get from Disk Utility: diskutil unmmountDisk diskN Leave the SSD attached, unmounted and powered on overnight. Ejecting the drive will usually turn off power to the drive. In the mean time you can use the Terminal app to unmount the SSD so that the external SSD continues to receive power in order to allow the SSD's internal garbage collection & maintenance routines time to run which may help to restore any lost performance. DriveDx doesn't do a great job on interpreting the health of an SSD so it is best to have the health report examined instead. You can even run the SSD's internal short self-diagnostic during the DriveDx trial period (it is even possible to run the long/exteneded self-diagnostic using the command line). However, even with this special driver some external drive's USB controllers and even some SSDs do not support this feature. You will need to install a special USB drive in order for DriveDx to access the health information on the external SSD. You can attempt to check the health of the external SSD by running DriveDx and posting the complete report here using the "Additional Text" icon which looks like a piece of paper. Even higher end SSDs will slow down somewhat when writing GB's of data once their write cache is filled, but they should not slow down that much (I'm not sure about a QLC SSD since I haven't used one yet).Īre you letting macOS manage the SSD or are you using the manufacturer's proprietary third party software? What file system is being used on the SSD? It is bad enough that the new NAND technology using QLC NAND and even previous TLC NAND is not as fast as the NAND used in earlier SSDs, but low end budget economy models will contain an extremely small write cache and no DRAM which greatly affect the SSD's performance. ![]() Some SSDs can become as slow as a hard drive especially when writing GB's of data in a short period of time. I don't believe macOS allows TRIM on external drives.Ĭontrary to popular belief not all SSDs are fast. ![]()
0 Comments
Leave a Reply. |