I‘ve used the mdadm command line utility to setup and manage software RAID 6 under Debian Linux server. However, I get the following message in /var/log/messages file:
[ 14.003707] JBD: barrier-based sync failed on md0-8 – disabling barriers
How do I fix the message ‘JBD error message “barrier-based sync failed”‘?
Recently, I’ve added another 73GB SAS disk to my Linux server after the installation. I’ve 30GB empty partition on old hard disk. How do I convert old /dev/sda3 and new /dev/sdb1 (both 30GB) into RAID 1 to improve NFS server speed and reliability?
mdadm -Ac partitions /dev/md0 -m dev
I’m getting the message/warning that read as follows:
Failed to RUN_ARRAY /dev/md0 invalid argument.
How do I fix this issue? How do I rebuild array again on Linux operating system using mdadm command?
Q. How can I recover from a lost software RAID device in CentOS version 4 / Debian version 3 / Red Hat Enterprise Linux 3 or 4 server system under RAID 5 software configuration?