Bootloader settings for additional SSDs.

Hi, a few years ago I took advise from this thread https://forums.opensuse.org/showthread.php/532803-Leap-15-0-SSD-and-HDD-Partitioning and added this setting to the kernel parameters for my 120GB SSD

scsi_mod.use_blk_mq=1

I am about to add a second SSD to replace my dying 2TB HDD that I used for data storage.So then I’ll have 1 x 120GB SSD for system and /home plus the new 2TB SSD for /data partition.

  1. Will the existing kernel parameter cover the second SSD - should I change anything in the parameters?
  2. Do I still need that setting these days?
  3. Any other gotcha’s I need to be aware of for multiple SSDs?

Thanks.

Hi
It’s the default these days so not necessary, for SSD’s mq-deadline and can check via;


cat /sys/block/sda/queue/scheduler

Change sda as appropriate for the block device.

Ok, so you’re saying I can remove this from the kernel parameters?

scsi_mod.use_blk_mq=1

Ran this on my current SSD…

chris@asus-roc:~> cat /sys/block/sda/queue/scheduler
[mq-deadline] kyber bfq none

…but what is it saying?

I get a slightly different result if I run on my dying HDD on /dev/sdb

chris@asus-roc:~> cat /sys/block/sdb/queue/scheduler
mq-deadline kyber [bfq] none

…with regard to [bfq] info.

Thanks.

Hi
Yes, the option is no longer needed, remove and reboot and check again… that’s correct bfq=rotating rust mq-deadline=ssd :wink: