I have two internal 4TB hard drives and I've just started using software RAID1 in Debian Wheezy. I have a few questions:
1) During boot, everything passes except I get a message that reads "RAID status not ok."
Everything seems to work fine. I can read/write to the RAID array just fine. I've set up the partitions as follows:
10MB on /dev/sda and 10MB on /dev/sdb -> /dev/mdb1 (swap space)
4TB on /dev/sda and 4TB on /dev/sdb -> /dev/mdb2 (ext4 root partition)
1MB biosgrub on each drive
During the partition creation phase of the installation, the installer complained saying that /dev/mdb1 (swap) couldn't be altered as it was being used. Installation got interrupted the first time round and I had to run the installer again a second time. So, I just ignored it and left /dev/mdb1 as it was. This RAID status message during boot is bugging me. What is it and what can I do to fix it?
2) What is the purpose of resyncing? Viewing the contents of
/proc/mdstat tells me that it's resyncing (which by the way seems to be going VERY slow). When I write to the RAID array, doesn't the data being written get mirrored across both drives? Or does it only get written to one drive and resyncing takes care of mirroring at a later stage? If the latter is true, how often does resyncing happen? It's a pain.
3) Is there a Debian tool that allows me to view the contents of each of the individual drives? I'd like to view the contents of each drive as a manual check to see whether they both contain the same data.