Unfortunately no one can be told what fun_plug is - you have to see it for yourself.
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I'm looking into upgrading my 2 500GB disks to 1TB ones. I want to keep the data from the old disks though. Currently they have a RAID1 of about 400GB and JBOD with the rest of the space.
I have a PC which I run Ubuntu on, and it has spare SATA ports and drive bays, so I can physically move the disks into that machine. The question is, if I do that, will it be able to read the existing filesystems so I can copy the data onto the new disks?
I see some posts mentioning mdadm, so I'm reading about that now. Is that the answer?
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You should have no difficulty reading data from the RAID1 partition - the JBOD one will be the challenge
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yes mounting the raid disks will be no problem - I had to specify the fs type as ext2 though as ubuntu complained otherwise. no idea about the other jbod partition though
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Thanks for the comments.
I think I have enough spare disk capacity that I can copy contents of the JBOD to another machine before I move the disks, so I can work around that issue.
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You should be able to do it with just one of the disks.
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Just following up. I'm in the middle of my upgrade, but I managed to put the old disks in my PC without too much trouble.
I'm running Ubuntu 8.04. I installed the 'mdadm' package before I added the disks. Then I moved the disks into the PC (I bought the extra SATA cables I needed last week).
I was a bit disappointed that Ubuntu didn't automatically mount my disks! Anyway, I ran these commands (as sudo):
mdadm --assemble /dev/md0 /dev/sdb2 /dev/sdc2
mdadm --assemble /dev/md1 /dev/sdb3 /dev/sdc3
This was enough for the disks to show up in the 'places' menu on Ubuntu and for them to be readable, which was the main thing I wanted to check. I guess when I get round to it I'll make sure they get assembled at boot and add them to /etc/fstab.
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