Incredibly Slow Boot

Breeliance · 24 January 2025 00:29

I have searched the existing open and closed issues

Required Information

DietPi version 9.9
Distro version | bookworm
Kernel version | Linux DietPi 6.6.62+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.6.62-1+rpt1 (2024-11-25) aarch64 GNU/Linux
Architecture | arm64
SBC model | RPi 5 Model B
Power supply used | 5,1V 5A (official PSU)
SD card used | KingSpec 128GB M.2 2242 NVMe SSD (+Geekworm X1001)

Steps to reproduce

Ironically upon trying to do set up a Backup on my NAS via NFS I experienced rather slow upload speed of 90-700kB or something like that so (blame on me) I unplugged the Pi from its power source to cancel the process.

From that point on the boot process takes INCREDIBLY long to get to the terminal Screen and I have no clue how to fix that x.x

Expected behaviour

faster/normal boottime

Actual behaviour

Stuck on Boot Screen for what feels like minutes

Extra details

Joulinar · 24 January 2025 00:48

You can try disabling zram

Breeliance · 24 January 2025 01:08

Well what exactly does that?

How do I do that?

And what do you think caused the Problem :/?

EDIT: I now unmounted zram via dietpi-drive_manager and now it starts fast as usual.

My concerns is: what ist zram for?
Will I need it?
Can/should I simply remount zram?

Joulinar · 27 January 2025 08:51

some kind of swap device zram - Wikipedia

depends on your personal environment and usage. With enough RAM, no swap or zram should actually be required.

swap as well as zram can be manages using /boot/dietpi/func/dietpi-set_swapfile

github.com

MichaIng/DietPi/blob/27401e0dd8eabaa70c4d2616113f3c0315697e4d/dietpi/func/dietpi-set_swapfile#L9-L19


      
          	#////////////////////////////////////
          	#
          	# Info:
          	# - Location: /boot/dietpi/func/dietpi-set_swapfile
          	# - Allows set the swap file size and path or disable it, based in input arguments, dietpi.txt entry, existing swap file or default, in that priority order.
          	#
          	# Usage:
          	# - <empty>	= this will apply the settings stored in dietpi.txt, refresh the current swap file or apply defaults as fallback
          	# - $1		= swap file size [MiB], use "0" to disable or "1" for auto-choice assuring min 2048 MiB total memory, respectively 50% of RAM size when used with "zram"
          	# - $2		= swap file path, or use "zram" to create a zram-swap on /dev/zram0 instead
          	#////////////////////////////////////

zram is not activated by itself. It must always be actively activated by the user.