Ubuntu – Does Ubuntu have support for the TRIM command for use with SSD

kernelssdtrim

SSD drives need to be "cleared/reset" after the drive fills up to maintain performance. This is done through the TRIM command for new SSD drives. Does Ubuntu support the TRIM command (through hdparm etc) for clearing/resetting of these drives?

Best Answer

Looks like there is support for the TRIM functionality in the 10.10 and newer releases:

How do I optimize the OS for SSDs?

Also, the TRIM stuff happens automatically - empty blocks are automatically released when they're no longer needed (eg, you delete a file), if the disk reports that it supports TRIM. You don't have to manually issue a hdparm command for this to work.

ATA Secure Erase

You should use the drive's security erase feature.

Make sure the drive Security is not frozen. If it is, it may help to suspend and resume the computer.
```
$ sudo hdparm -I /dev/sdX | grep frozen
       not     frozen 
```
The (filtered) command output means that this drive is ”not frozen” and you can continue.
Set a User Password (this password is cleared too, the exact choice does not matter).
```
sudo hdparm --user-master u --security-set-pass Eins /dev/sdX
```

Issue the ATA Secure Erase command

sudo hdparm --user-master u --security-erase Eins /dev/sdX

Note:

/dev/sdX is the SSD as a block device that you want to erase.
Eins is the password chosen in this example.

See the ATA Secure Erase article in the Linux kernel wiki for complete instructions including troubleshooting.

Ubuntu – Is SSD TRIM support still automatic in 12.10

TRIM support is built into Quantal 3.5 kernels but you need to enable it yourself using the discard mount option.

How to enable TRIM?

Best Answer

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Ubuntu – the recommended way to empty a SSD

ATA Secure Erase

Ubuntu – Is SSD TRIM support still automatic in 12.10

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