Home / ubuntu / Questions / 9481
In Process
Georg Schölly
Asked: 2010-10-26 12:36:55 +0800 CST

Does rebuilding a RAID change data?

  • 772

I've just restarted my computer which was building up a RAID5 for the first time. This of course meant that my computer had to rebuild the whole thing from ground up.

Before I restarted the computer I've had already set up a file system, which cannot be found anymore.

So: Does building up the RAID (again) overwrite any information placed on the volume?

raid mdadm

1 Answers

  1. It's best not to reboot your system until after the initial RAID sync has finished, but you should be able to create your LVM physical volumes (pvcreate /dev/md0 etc). If you've already done this and they're not showing up, it's possible that on restart the system did not auto-start your RAID due to it being out of sync. If you RAID is running correctly, you should be able to manually restart your LVM with sudo vgchange -a y at which point the LVs should be visible again with sudo lvs.

    • 2