Enabling TRIM on SSD

Question

Enabling TRIM on SSD

I recently installed a 1TB WD SSD in my iMac. I was told that I should run the TRIM command to improve the performance of my SSD drive. I have a 3TB External SATA drive connected to the iMac. When I ran the TRIM command, I got a message saying that enabling could cause connected devices to lose data.

What my question is, if I disconnect the 3 TB external SATA drive and run TRIM then plug my external drive back in, will this cause me to lose any data on the external hard drive while TRIM is enabled?

iMac 27", macOS 10.14

Posted on Mar 29, 2019 8:25 AM

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Answer 1

VikingOSX

Level 10

123,072 points

Mar 29, 2019 8:59 AM in response to anthonyfromphoenix

You should follow the manufacturer's recommendation, not what "someone" said, about whether running TRIM support is needed at all, or may potentially damage the drive because TRIM is built into the drive controller.

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Answer 2

Mar 29, 2019 11:50 AM in response to VikingOSX

Thats why I'm asking. I went to the manufacturers website and this is all it says. It says it's supported, but doesn't state if it comes enabled.

Does the WD Blue SSD support the TRIM command?

Yes. TRIM command is supported by the WD Blue SSD.

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Answer 3

Rudegar

Level 10

179,976 points

Mar 30, 2019 4:37 AM in response to anthonyfromphoenix

have you checked if trim is already enabled ?

How to check TRIM status via Terminal - Apple Community

more

https://www.google.com/search?source=hp&ei=sFSfXPnjKunisAeIii8&q=macos+check+if+trim+is+enabled&btnK=Google-s%C3%B8gning&oq=macos+check+if+trim+is+enabled&gs_l=psy-ab.3..0i19j0i22i10i30i19j0i22i30i19.703.703..1647...0.0..0.247.328.1j0j1......0....2j1..gws-wiz.....0.OfO7nGyjqFs

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Answer 4

HWTech

Level 9

68,312 points

Mar 30, 2019 5:03 PM in response to anthonyfromphoenix

You should uncheck "Put hard disk to sleep when possible" in the Energy Saver System Preferences as it really isn't needed for an SSD. Also putting some SSD's to sleep can cause problems such as slow wake up times. Disabling this feature should also allow the SSD's internal garbage collection routines time to run especially if TRIM is not enabled.

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Answer 5

Mar 30, 2019 3:51 AM in response to anthonyfromphoenix

"... I got a message saying that enabling could cause connected devices to lose data..."

Basically a general disclaimer since most anything can happen when

messing with drives.

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Answer 6

DonH49

Level 6

16,716 points

Mar 29, 2019 8:37 AM in response to anthonyfromphoenix

Don't run that from force command using Mojave.

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Enabling TRIM on SSD

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