As my visitors are the best average consumer available I have some questions for you. And with your answers I will be capable of doing nice things ;-)
This is your way to express what you want or tell me what you need.
In some very rare conditions (I still did not found when and why) it’s possible that a RAID1 array made onto the CH3SNAS gets into a degraded status and even a reboot is not solving the issue.
How to get the RAID array fixed again?
First of all: make sure you have telnet running. Telnet can be installed by using one of the many fun_plugs around. So no explanation from me about that.
Login to the shell
first check the actual raid status:
# cat /proc/mdstat
Normally you should get something like this:
Personalities : [linear] [raid0] [raid1]
md0 : active raid1 sda2[0] sdb2[1]
xxxxx blocks [2/2] [UU]
But when degraded the raid status shows: [_U] or [U_]
Do some debugging with the command:
# mdadm -D /dev/md0
This will show the actual HDD’s in the array. For the CH3SNAS it can be:
/dev/sda2 or /dev/sdb2 if one of the disks is not in the array anymore you have to add it manually by using the following command:
mdadm /dev/md0 -a [degraded hdd]
this is: /dev/sdb2 or /dev/sda2
System will report:
mdadm: hot added /dev/sdb2; and the array will be synced again (seen through webinterface or using the `# cat /proc/mdstat command`)