so then why did his virtual machine not look at the partitions as UUIDs but rather as /dev/sd?? ? :-)~MIKE~(-: On Tue, Dec 30, 2014 at 9:29 PM, James Mcphee wrote: > Hrmph, I guess you don't need one these days. I'm working off an old > system that's been upgraded since the bronze age. > > https://www.gnu.org/software/grub/manual/html_node/Device-map.html > > On Tue, Dec 30, 2014 at 9:13 PM, Michael Havens wrote: > >> I suppose not..... so where are UUID and logical addresses kept? >> >> :-)~MIKE~(-: >> >> On Tue, Dec 30, 2014 at 9:04 PM, Michael Havens wrote: >> >>> well I thought to myself that I should investigate the file before >>> asking any questions but: >>> >>> cat /boot/grub/device.map >>> cat: /boot/grub/device.map: No such file or directory >>> >>> I then reasoned that I would play the game and see what the >>> files were in /boot/grub . >>> >>> grub.cfg grubenv >>> >>> so I suppose it is grub.cfg? >>> >>> :-)~MIKE~(-: >>> >>> On Tue, Dec 30, 2014 at 8:27 PM, James Mcphee wrote: >>> >>>> /boot/grub/device.map keeps things mapped by logical location and uuid. >>>> if you created a new partition, even if it had the same UUID, it would >>>> have a different logical address. >>>> >>>> On Tue, Dec 30, 2014 at 7:41 PM, Michael Havens >>>> wrote: >>>> >>>>> better yet could someone come explain it to us: >>>>> >>>>> http://www.bleepingcomputer.com/forums/t/561405/new-partition-scheme/page-2#entry3582631 >>>>> >>>>> :-)~MIKE~(-: >>>>> >>>>> On Tue, Dec 30, 2014 at 7:38 PM, Michael Havens >>>>> wrote: >>>>> >>>>>> I'm part of another discussion in which we are talking about UUIDs. >>>>>> This is what one of the participants said: >>>>>> >>>>>> As pointed out earlier by bmike1 in response to my comment about >>>>>> GRUB2 not being able to find the OS if you move the partitions, by default >>>>>> on Linux Mint GRUB2 will use UUIDs *(the id tag for your partitions)* instead >>>>>> of partition numbers*(eg: sda1, sda2, etc)*, so I was incorrect when >>>>>> I said GRUB2 won't be able to find the boot partition. Linux Mint's fstab *(a >>>>>> config file read at boot to tell Mint which partitions should be >>>>>> automatically mounted)* also uses UUIDs by default so no issues >>>>>> there. Therefore I do not see any reason why moving your installation would >>>>>> be an issue *(keep reading)*, so I decided to test it in a virtual >>>>>> machine. I installed Linux Mint 17.1 - Cinnamon 64bit *(I've been >>>>>> wanting to try Linux Mint for a while. I've been downloading a little bit >>>>>> of the ISO each day)* with a partition layout similar to yours *(http://i.imgur.com/3qg0bSv.png >>>>>> )*. I wasn't able to move the >>>>>> extended partition using Gparted, or create a new one. In the end I just >>>>>> created 3 new primary partitions and cloned the Linux Mint logical >>>>>> partitions to them using dd *(dd is a sector based cloning tool that >>>>>> comes pre-installed on most Linux operating systems. I used it because this >>>>>> way the new partitions will have the same UUIDS as the Linux Mint ones did. >>>>>> This is important since GRUB2 is using UUIDS to identify the boot partition >>>>>> and because the fstab uses UUIDs to identify your swap partition)*. >>>>>> Then I deleted the old partitions *( http://i.imgur.com/hDBT5ns.png >>>>>> )*. The result was that GRUB2 was >>>>>> unable boot Linux Mint because it couldn't find the boot partition *(I >>>>>> don't know why this is, but if I had to take a guess it would be that GRUB2 >>>>>> was probably storing part of itself on the extended partition's VBR which >>>>>> no longer exists because I deleted the extended partition)*. So >>>>>> GRUB2 needed to be repaired. Using a Linux Mint Live-cd, I ran "sudo >>>>>> add-apt-repository ppa:yannubuntu/boot-repair"*(this adds a third >>>>>> party repo that has boot-repair in it, because it's not available in the >>>>>> default Linux Mint repos)*, "sudo apt-get update" *(to update apts >>>>>> package list)*, "sudo apt-get install boot-repair" *(to download and >>>>>> install boot-repair)*, and then I ran boot-repair with its default >>>>>> settings *(be warned by default boot-repair uploads information >>>>>> about your computer online, you can disable this)*. This >>>>>> successfully fixed GRUB2, and I was able to boot Linux Mint again *(http://i.imgur.com/ZJhXRbe.png >>>>>> )*. >>>>>> >>>>>> I then said: >>>>>> >>>>>> I think I know why it needed repairing. The reason is that you >>>>>> created new partitions (new UUIDs) and deleted the old partitions (the >>>>>> existing UUIDs). >>>>>> >>>>>> to which he responded: >>>>>> >>>>>> The partitions were cloned with dd so that they would have the same >>>>>> UUIDs. I also used "sudo blkid" to verify the uuids of the new primary >>>>>> partitions matched before deleting the original logical partitions. >>>>>> >>>>>> He and I both remarked between the first and last quote that we >>>>>> thought the UUID of the partition would of had it recognized regardless of >>>>>> what we did with other partitions on the drive. Could someone kindly >>>>>> explain to us wherein the difficulties lie? >>>>>> :-)~MIKE~(-: >>>>>> >>>>> >>>>> >>>>> --------------------------------------------------- >>>>> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org >>>>> To subscribe, unsubscribe, or to change your mail settings: >>>>> http://lists.phxlinux.org/mailman/listinfo/plug-discuss >>>>> >>>> >>>> >>>> >>>> -- >>>> James McPhee >>>> jmcphe@gmail.com >>>> >>>> --------------------------------------------------- >>>> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org >>>> To subscribe, unsubscribe, or to change your mail settings: >>>> http://lists.phxlinux.org/mailman/listinfo/plug-discuss >>>> >>> >>> >> >> --------------------------------------------------- >> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org >> To subscribe, unsubscribe, or to change your mail settings: >> http://lists.phxlinux.org/mailman/listinfo/plug-discuss >> > > > > -- > James McPhee > jmcphe@gmail.com > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org > To subscribe, unsubscribe, or to change your mail settings: > http://lists.phxlinux.org/mailman/listinfo/plug-discuss >