Arch Linux

tophsic

Member

Registered: 2015-11-05

Posts: 11

[SOLVED] Swap partition not activated

Hello,

I installed Archlinux with the Beginner's guide with no problem.

I just saw some errors on dmesg about the swap partition. My laptop is a Lenovo X250 with a 250Go SSD. Here is few logs.

fdisk -l /dev/sda
Disk /dev/sda: 238.5 GiB, 256060514304 bytes, 500118192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: C99CC37D-A62E-46EE-B5FB-47A6006EF3E5

Device         Start       End   Sectors  Size Type
/dev/sda1       2048   1050623   1048576  512M EFI System
/dev/sda2    1050624  84934655  83884032   40G Linux filesystem
/dev/sda3   84934656 101711871  16777216    8G Linux swap
/dev/sda4  101711872 500117503 398405632  190G Linux filesystem

cat /etc/fstab
# /dev/sda2
UUID=da927f84-36d8-4507-8de4-74e39007b6a3       /               ext4            rw,relatime,data=ordered        0 1

# /dev/sda1
UUID=28DD-714E          /boot           vfat            rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro    0 2

# /dev/sda4
UUID=e91b6063-bc0b-4330-b0dd-c38f2c0ac2c0       /home           ext4            rw,relatime,data=ordered        0 2

Partial dmesg log

[    1.383384] systemd[1]: Found device LITEON_LCH-256V2S 3.
[    1.384838] systemd[1]: Activating swap Swap Partition...
[    1.386148] systemd[1]: Starting File System Check on /dev/disk/by-uuid/28DD-714E...
[    1.390758] systemd[1]: Found device LITEON_LCH-256V2S 4.
[    1.392072] systemd[1]: Starting File System Check on /dev/disk/by-uuid/e91b6063-bc0b-4330-b0dd-c38f2c0ac2c0...
[    1.394442] tpm_tis 00:05: TPM is disabled/deactivated (0x6)
[    1.404396] input: PC Speaker as /devices/platform/pcspkr/input/input6
[    1.406972] systemd[1]: dev-sda3.swap: Swap process exited, code=exited status=255
[    1.407193] systemd[1]: Failed to activate swap Swap Partition.
[    1.409933] systemd[1]: dev-sda3.swap: Unit entered failed state.
[    1.411280] systemd[1]: Reached target Swap.

journalctl -b | grep swap
Nov 14 06:54:37 christophe kernel: CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.2.5-1-ARCH #1
Nov 14 06:54:37 christophe kernel: zswap: loading zswap
Nov 14 06:54:37 christophe kernel: zswap: using zbud pool
Nov 14 06:54:37 christophe kernel: zswap: using lzo compressor
Nov 14 06:54:37 christophe systemd[1]: Activating swap Swap Partition...
Nov 14 06:54:37 christophe systemd[1]: dev-sda3.swap: Swap process exited, code=exited status=255
Nov 14 06:54:37 christophe systemd[1]: Failed to activate swap Swap Partition.
Nov 14 06:54:37 christophe systemd[1]: dev-sda3.swap: Unit entered failed state.
Nov 14 06:54:37 christophe swapon[197]: swapon: /dev/sda3 : échec de lecture d'en-tête d'espace d'échange

Do I just need to declare swap partition in fstab?

I read somewhere that systemd did not need it I use systemd 227-1.

Last edited by tophsic (2015-11-14 09:51:42)

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 19,804

Re: [SOLVED] Swap partition not activated

Hi, and Welcome to Arch Linux.

No, do not put swap in /etc/fstab.
Did you do a mkswap on /dev/sda3?  Did you do a swapon command?  (Not sure if that is necessary)
As I just installed Arch on a laptop this morning, I can attest that it is easy to miss steps *cough*locale-gen*cough*, so I'll not cast stones if you missed a step

Also, your error translates as "read failure header swap space".  That is my I asked about mkswap.  Also, How much RAM have you?  If it is more than 4G, you might need more swap space.

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tophsic

Member

Registered: 2015-11-05

Posts: 11

Re: [SOLVED] Swap partition not activated

Thanks a lot, indeed, I missed the mkswap step.