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Why does my mdadm RAID array not mount?
I have a raid array defined in /etc/mdadm.conf like this: The fs on the partions is ext3 and when I specify the fs with -t, I get mount: wrong fs type, bad option, bad superblock on /dev/md126, missing codepage or helper program, or other error (could this be the IDE device where you in fact use ide-scsi so that sr0 or sda or so is needed?)
How many drives can mdadm find in RAID 5?
What it means is that mdadm has found 10 drives out of your 12-drive RAID5 array, and as I hope you’re aware RAID5 can only survive one failure, not two. Well, let’s try and piece together what happened.
Why are my RAID 5 drives not working?
Google reported that dmraid is a possible culprit – but trying to remove it shows it is not installed. System is a 12 drive RAID-5, but it seems 2 of the drives is not having the correct superblock data installed.
Which is better LVM or mdadm RAID arrays?
Just as an aside, it normally works better if you don’t create multiple raid arrays on a disk (ie, /dev/sd [bc]6 and /dev/sd [bc]7) separately. Rather, create only one array, and you can then create partitions on your array if you must. LVM is a much better way to partition your array most of the time.
What happens when RAID array fails in Linux?
The Linux Software RAID system detects the first drive failure and switches the array over to degraded mode. This means the array continues to operate but it’s only using the three remaining good drives. Things will appear to operate normally for a period of time until a second drive drops out of the array.
How many drives does mdadm / dev / Md0 have?
# mdadm –assemble –scan mdadm: /dev/md0 has been started with 1 drives. mdadm: /dev/md1 has been started with 2 drives. In the meantime, I’ve figured out that my superblocks seem to be damaged (PS I have confirmed with tune2fs and fdisk that I’m dealing with an ext3 partition):
Why is my Buffalo NAS drive E14 array not mountable?
Last week it came up with an error HD1 Fault. I called Buffalo and they sent me a replacement HDD. At that time, I was able to access the “Share” Folder. Yesterday, I put tthe new HDD from Buffalo and rebuild the Array (instructed by Buffalo).