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6

In this scenario, each disk would claim that the other disk failed. The result depends on how exactly you're assembling disks, but essentially, it will go with one disk and ignore the other; or it might assemble the other as a separate raid, which gives you a split brain. I've done an experiment with loop devices, where I first changed loop1 and then ...


0

You should be able to just mount /dev/md1 (your /home on your Debian installation) and /dev/md3 (your / on your Debian installation), e.g. by doing mount /dev/md3 /mnt mount /dev/md1 /mnt/home (if you're running a live-CD system there may already be things mounted on /mnt, but you can use another directory).


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In RAID recovery, you should never, never, ever --create unless you really really REALLY know EXACTLY what you're doing. However your output looks like you've already done the --create. The RAID on your /dev/sde is a RAID5, created Sun Apr 29 22:14:28 2012, consisting of 8 disks as you stated in your question. This RAID was last updated on Fri Dec 27 ...


0

you say "After finding the raid in a degraded state, I tried a number of times to bring it back." what did you do exactly? if you find a degraded array you need to replace the failed disk. if you did not do that and you got another drive failure, your RAID is gone! RAID5 tolerates only one failed drive. you say you have eight 2TB drives in your RAID5. your ...


1

The raid configuration is stored on the raid devices themselves. You could take your RAID drives out of that computer and put them into any computer and mdadm would be able to start the RAID off them. Problems start when the metadata on the drives themselves is damaged. You could include your SSD in the RAID 1, using 128G on the HDDs and write-mostly. You'd ...


0

I am not familiar with Slackware, but if your initramfs does not detect the raid properly, you can try to make it work with the kernel's raid auto detection. To do that, set the partition type to 0xFD. I am not sure about the number, use the l command in fdisk or gdisk to find the "raid autodetect" partition type.


5

How mature and featureful is LVM RAID? LVM-RAID is actually mdraid under the covers. It basically works by creating two logical volumes per RAID device (one for data, called "rimage"; one for metadata, called "rmeta"). It then passes those off to the existing mdraid drivers. So things like handling disk read errors, I/O load balancing, etc. should be fairly ...


1

I didn't know LVM could do RAID either. Personally, I would stick with mdadm since it's a much more mature software that does the same thing. If something breaks with LVM RAID, you're probably not going to be able to get as much support than if you had gone with mdadm. Additionally, I wouldn't trust LVM RAID since LVM has historically shown to not be the ...



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