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Title:
Why does Ubuntu enable TRIM for certain brands only?
ID:
/2018/04/18/Why-does-Ubuntu-enable-TRIM-for-certain-brands-only_
Created:
April 18, 2018
Edited: April 19, 2018
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April 8, 2024
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When it comes to low-level Disk I/O such as TRIM, Ubuntu doesn’t have much control. It’s really up to the Linux Kernel and the SSD manufacturer. Before running TRIM you have to make sure your SSD supports it or it could become an expensive paperweight.
To find out for sure use:
$ lsblk --discard
NAME DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO
sdb 0 0B 0B 0
├─sdb4 0 0B 0B 0
├─sdb2 0 0B 0B 0
├─sdb5 0 0B 0B 0
├─sdb3 0 0B 0B 0
└─sdb1 0 0B 0B 0
sr0 0 0B 0B 0
sda 0 0B 0B 0
├─sda4 0 0B 0B 0
├─sda2 0 0B 0B 0
├─sda5 0 0B 0B 0
├─sda3 0 0B 0B 0
└─sda1 0 0B 0B 0
nvme0n1 512 512B 2T 0
├─nvme0n1p5 0 512B 2T 0
├─nvme0n1p3 0 512B 2T 0
├─nvme0n1p1 0 512B 2T 0
├─nvme0n1p6 0 512B 2T 0
├─nvme0n1p4 0 512B 2T 0
├─nvme0n1p2 0 512B 2T 0
└─nvme0n1p7 0 512B 2T 0
When DISC-GRAN DISC-MAX columns contain non-zero values it is safe to use TRIM. If you are unsure which disk is which in this display you can get the model name and number using:
$ lsblk -o NAME,FSTYPE,LABEL,MOUNTPOINT,SIZE,MODEL
NAME FSTYPE LABEL MOUNTPOINT SIZE MODEL
sdb 14.4G STORE N GO
├─sdb4 iso9660 Ubuntu 18.04 LTS amd64 /media/rick/Ubunt 1.4G
├─sdb2 1M
├─sdb5 ext4 casper-rw /media/rick/caspe 6.4G
├─sdb3 vfat usbboot 244M
└─sdb1 ntfs usbdata /media/rick/usbda 6.4G
sr0 1024M DVD+/-RW DW316
sda 931.5G HGST HTS721010A9
├─sda4 ntfs WINRETOOLS 450M
├─sda2 128M
├─sda5 ntfs Image 11.4G
├─sda3 ntfs HGST_Win10 /mnt/d 919G
└─sda1 vfat ESP 500M
nvme0n1 477G Samsung SSD 960 PRO 512G
├─nvme0n1p5 ext4 NVMe_Ubuntu_16.0 / 44.6G
├─nvme0n1p3 16M
├─nvme0n1p1 ntfs 450M
├─nvme0n1p6 swap Linux Swap [SWAP] 7.9G
├─nvme0n1p4 ntfs NVMe_Win10 /mnt/c 414.9G
├─nvme0n1p2 vfat /boot/efi 99M
└─nvme0n1p7 ntfs Shared_WSL+Linux /mnt/e 9G
So in this case the SSD is a Samsung Pro 960 which does indeed support TRIM command.
For more details see this Arch Linux article.