Use the fstrim command in linux to reclaim unused blocks from mounted file systems

Editor to share with you to use the fstrim command in linux to recycle the unused blocks of the mounted file system. I hope you will learn a lot after reading this article. Let's discuss it together.

Fstrim is used to recycle (also known as "trim") all unused blocks on a mounted file system; this makes sense for solid state disk (SSD) and compact configuration (thinly-provisioned) storage devices. By default, fstrim will recycle all unused blocks on the file system. However, you can limit the scope and size of recycling through options.

Syntax format: fstrim [parameters]

Common parameters:

Reference example

Reclaim unused space on all mounted file systems (including all devices that support "trim"):

[root@linuxcool] # fstrim-a

Set the starting point for searching for free blocks on the file system, that is, only the space after that point:

[root@linuxcool] # fstrim-o 512

Set the search length, that is, how far to search for free blocks from the starting point:

[root@linuxcool] # fstrim-l 512

Verbose mode, which outputs the details of the recycling process:

[root@linuxcool] # fstrim-v after reading this article, I believe you have some understanding of using the fstrim command in linux to recycle unused blocks of mounted file systems. If you want to know more about it, welcome to follow the industry information channel. Thank you for reading!