My partition /dev/sda3 on an SSD drive doesn't contain any filesystem, but it contains garbage. How do I do a TRIM/DISCARD operation on the whole partition?
Linux SSD – How to TRIM/DISCARD a Whole Partition
linuxpartitioningssdtrim
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I emailed them. And TRIM will not work. Because the OS doesn't know where files are stored. Only the encrypted system knows it. Due to the fact that the encryption comes first. I'll use truecrypt instead. On top of the file system for my home folder.
Download and install the Intel SSD Toolbox.
If your drive is not an Intel SSD, the only option available will be View Drive Information. Click that. Scroll down to
Word
169, Bit 0 - Data Set Management Supported
If this is 1, you have TRIM. If 0, you don't.
Best Answer
If your version of util-linux is new enough (September 2012), there is actually a purpose-built tool,
blkdiscard, that is the best way to do this:But if you need compatibility to older Linux distro versions, read on... There are cases where
hdparm/wiper.shrefuse to touch a volume because it's not a partition, so we need something beyond that.The most supported way I've found is to take advantage of the fact that Linux swap volumes support DISCARD when they are enabled. The wipefs on the end is there so the volume isn't recognized as swap later.
This issues the DISCARD on the majority of the device.