On 9/20/19 8:59 AM, Wols Lists wrote:
On 19/09/19 21:45, Liviu Petcu wrote:
Hello,
Please let me know if in this situation detailed below, there are chances of restoring the RAID 10 array and how I can do it safely.
Thank you!
This is linux raid 10, not some form of raid 1+0? That's what it looks
like to me. I notice it says the array is active! That I think is good news!
I thought that there should be a flag like 'degraded' if the raid was actually running. I can't find the kernel documentation any more.
Can you mount it read-only and read it? I would be surprised if you
can't, which means the array is running fine in degraded mode. NOT GOOD
but not a problem provided nothing further goes wrong. I notice it's
also version 0.9 - is it an old array? Have the drives themselves
failed? (which I guess is probably the case :-( I guess the drives
effectively have just the one partition - 2 - and 1 is something
unimportant?
What you said is definitely true for a near layout for an even number of devices and n=2.
I thought the offset layout meant any two adjacent raid devices failing was data loss, assuming this is accurate:
http://www.ilsistemista.net/index.php/linux-a-unix/35-linux-software-raid-10-layouts-performance-near-far-and-offset-benchmark-analysis.html?start=1
--Sarah
