Comment 180 for bug 453579

My issue seems to be related not to ext4 or my memory but to my swap. I tried to download 2 times the same 30 Mb files without swap, and this time it was the same md5.

In addition, I tried to fill my swap partition with zeros, and I have an error:

% sudo dd if=/dev/zero of=/dev/sda5 bs=1024
22293+0 records in
22293+0 records out
22828032 bytes (23 MB) copied, 16.7581 s, 1.4 MB/s
1331109+0 records in
1331109+0 records out
1363055616 bytes (1.4 GB) copied, 254.542 s, 5.4 MB/s
dd: writing `/dev/sda5': Input/output error
2931829+0 records in
2931828+0 records out
3002191872 bytes (3.0 GB) copied, 471.766 s, 6.4 MB/s
zsh: exit 1 sudo dd if=/dev/zero of=/dev/sda5 bs=1024

Is there any check done on swap partition ? Can the kernel detect errors on it ? Is there a way to avoid bad clusters with swap partitions ?

I had also an issue (scrambled screen when booting) which disappeared but I can't be sure it was solved by the swap deactivation, as I tried several things at the same time (replacing kdm by gdm, removing splash at boot, and maybe an upgrade solved the problem).