fstabdiscard

BlockdiscardoperationsallowSSDstooptimizegarbagecollectionroutines,andtheycaninformthinly-provisionedstoragetorepurposeunusedphysicalblocks.,2021年3月24日—Finally,youneedtoenablediscardforallofyourext4partitions:simplyaddthediscardoptionto/etc/fstab.Notethatswaponaswap ...,2012年6月10日—Myanswerherementionsthewhy,butforthespecificreasonstonotenableitbydefault,comesdowntoseveralimportantfactors...

參考資訊如下
Chapter 24. Discarding unused blocks

Block discard operations allow SSDs to optimize garbage collection routines, and they can inform thinly-provisioned storage to repurpose unused physical blocks.

Enable DiscardTrim for your SSD

2021年3月24日 — Finally, you need to enable discard for all of your ext4 partitions: simply add the discard option to /etc/fstab . Note that swap on a swap ...

fstab

2012年6月10日 — My answer here mentions the why, but for the specific reasons to not enable it by default, comes down to several important factors that ...

Is "discard=async" a supported fstab mount option for Ext4 ...

2023年5月25日 — As far as I can tell, discard=async is btrfs-specific and fairly new. It was initially introduced in 2019, and became the default in Linux 6.2.

Is mounting with "discard" needed for TRIM?

2021年5月16日 — If the filesystem is mounted with discard , then deleting files will automatically cause the TRIM command to be issued.

Linux 使用SSD 的最佳化分割、設定方式

2015年8月4日 — ... fstab /etc/fstab_bak-notrim # 備份fstab; sudo vim /etc/fstab # 找到SSD 的ext4 磁區，在errors 之前加上discard，或defaults 之後加上discard; 範例 ...

Solid state drive

2024年7月7日 — This way, there is no need to edit /etc/fstab on every machine. ... Warning: The discard option allows discard requests to be passed through the ...

SSD

2024年6月4日 — For mount points with a low amount of disk writes occurring on a SSD it should be safe to use the discard mount option in /etc/fstab. Also it is ...

When and where to use rw,nofail,noatime,discard,defaults?

2017年5月24日 — I am using OpenStack Cloud and using LVM on RHEL 7 to manage volumes. As per my use case, I should be able to detach and attach these volumes to ...

[fstab] Is 'discard' option still wise to use these days? #1395

2020年5月7日 — All major Linux distribution publishers report that discard option can have a negative effect on data integrity or slows down. Systemd can now ...