Hi,

 

Last night I got home to find my unraid server had kernel panicked. I could not issue any command directly on the computer, and I could not putty into it either, no we interface.

 

I reset the computer and started unraid in safe mode. I found that one of my disks was offline (on web interface). This is a Toshiba 3TB drive that is less than a year old. I read a posts that it could be anything from a failed drive, to a cable becoming unplugged.

 

As a safety measure, and by pure coincidence, I was keeping a spare 3TB drive that I had pre-cleared just for this eventuality. So without taking any chances, I turned off machine, swapped drives, and started up the machine in safe mode. I re-assigned the new drive and it reported that it is rebuilding the data.

 

However, after 3 hours, when I try to refresh the main page (F5)... it takes like 5 minutes to refresh and still reports 0% completion, stuck at position of 571.21MB. The drive had about 1.6TB of data.

 

Is the machine stuck? Is it doing anything? I am in limbo here. I want to re-build my data safely... I CAN putty into it.     

 

Later on I will check the old 3TB drive to see if there is anything wrong.... I will probably run it through 2 cycles of pre-clearing.

 

 

Please someone give me some advice.

 

Many thanks,

 

H.

 

 

 

 

 

See here

See here

 

Thank you Trurl...

 

I am attaching my syslog.... I see there are some error reading Disk 3.... unraid is rebuilding Disk 1...!!

 

What does this mean? Do I have 2 drives failing at the same time?!  :'(

 

syslog.zip

Did you check the cables? What is your PSU? A rebuild should not be attempted unless you are reasonably certain there isn't some other cause of the problem.

 

You said one disk was offline. Was it red-balled or just not present?

 

See here.

It was red-balled...

I had run a short version of smartctl  on drive 1... and it showed no errors... but I thought I would avoid any risk by simply replacing that drive. Disk 3 at the time was green balled.

 

I checked the cables at the hard drive end... I cant recall my PSU, but it has all been running for 2 years. Last drives I added was 8 months ago or so.

 

 

What about my other questions, checked cables, PSU?

 

Attempting a rebuild when there may be some other undiagnosed issue is actually putting you at risk instead of avoiding risk.

 

What ever you do don't preclear the old disk. The rebuild may not succeed and the old disk may be the only way to keep that data.

 

 

 

I am at work at the moment and cant check the PSU or the other end of the power cables... I can get to my home desktop from work.

 

I will not pre-clear the old drive... in fact, I was planning on buying one or two 4TB drives on way home, and start by copying the data on old drive to a new 4TB drive.

 

What can I do at the moment... the computer is doing something... should I leave it be? What about my disk 3...?

to clarify the above... I was planning on copying from the old drive to new drive on a separate unix computer.

Probably the PSU is working, just wondered about the connections and the specs. Do you know the model? Not all PSUs are created equal when it comes to running a lot of disks.

A rebuild will only write to the drive being rebuilt so it won't affect your other drive's data. Probably best to not have anything else writing to the array until you get stabilized.

It seems to be crawling along.... now it is at position 14GB and finally got to 1% completion. The syslog has not reported much in the past hour so I assume that it is building... I hope the speed increases and it will not take 6 months to build... I will report.

 

Trurl thanks... everyone please cross your fingers for me....