From 2c3f1522274c09f7cfdb6309adc0719f05c188e9 Mon Sep 17 00:00:00 2001 From: "Suren A. Chilingaryan" Date: Thu, 5 Jul 2018 06:29:09 +0200 Subject: Update monitoring scripts to track leftover OpenVSwitch 'veth' interfaces and clean them up pereodically to avoid performance degradation, split kickstart --- docs/kickstart.txt | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'docs/kickstart.txt') diff --git a/docs/kickstart.txt b/docs/kickstart.txt index 1331542..b94b0f6 100644 --- a/docs/kickstart.txt +++ b/docs/kickstart.txt @@ -11,4 +11,14 @@ Troubleshooting dmsetup remove_all dmsetup remove - \ No newline at end of file + - Sometimes even this does not help. + > On CentOS 7.4 mdadm does not recognize the disk, but LVM thinks it is + part of MD. Then cleaning last megabytes of the former md partition may help. + > On Fedora 28, mdadm detects the old array and tries to "tear down" it down, but + fails as raid array is already innactive. + + * If raid is still more-or-less healthy. It can be destroyed with + mdadm --zero-superblock /dev/sdb3 + * Otherwise: + dd if=/dev/zero of=/dev/sda4 bs=512 seek=$(( $(blockdev --getsz /dev/sda4) - 1024 )) count=1024 + -- cgit v1.2.3