I've got a Toshiba laptop that I have two drives in (/dev/sda and /dev/sdb). I was having some issues with /dev/sda so I bought the second drive, dd'd drive sda contents to drive sdb, and the removed sda and replaced it. I used sdb for the boot drive until receiving the replacement. Upon arrival, I inserted the new drive as sda, dd'd the contents from sdb back to sda, and rebooted. It appears that I'm still rebooting from sdb at this point (which is ok with me). What I don't understand and don't like to see is the following:
/dev/sda11 on / type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered) /dev/sdb5 on /boot type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered) /dev/sda12 on /work type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered) /dev/sdb7 on /usr type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered) /dev/sdb8 on /var type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered) /dev/sda6 on /home type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered) /dev/sdb9 on /opt type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered)
Why is Fedora (16 x64 beta in this case) cross mounting my partitions? I was halfway considering setting up a mirror for these drives but not I'm going to have to do some very particular dd'ing to get one drive to be the "latest" files. Is this SOP or is something odd going on here?
Thanks.
Kevin Martin
On Thu, 29 Sep 2011 07:58:06 -0500 Kevin Martin wrote:
or is something odd going on here?
Odds are good that the /etc/fstab file refers to partition UUID values to identify what to mount. If you have completely duplicated the driver with a dd command, those UUIDs will be ambiguous and which ever one it stumbles across first is the one it will use.
On 09/29/2011 08:13 AM, Tom Horsley wrote:
On Thu, 29 Sep 2011 07:58:06 -0500 Kevin Martin wrote:
or is something odd going on here?
Odds are good that the /etc/fstab file refers to partition UUID values to identify what to mount. If you have completely duplicated the driver with a dd command, those UUIDs will be ambiguous and which ever one it stumbles across first is the one it will use.
Ooooohhhhh, didn't occur to me that that information would be dd'd! Crud! Guess I'm off to do some partition copies!
Thanks.
Kevin
On Thu, 29 Sep 2011 09:57:17 -0500 Kevin Martin wrote:
Ooooohhhhh, didn't occur to me that that information would be dd'd! Crud! Guess I'm off to do some partition copies!
No need for anything that drastic. You could just do something like use e2label to give the partitions symbolic labels (different on each disk) and change fstab to use LABEL= instead of UUID=. I think there is even a tool that lets you change the UUID, but I don't remember the name or how to use it :-).
On 09/29/2011 10:27 AM, Tom Horsley wrote:
On Thu, 29 Sep 2011 09:57:17 -0500 Kevin Martin wrote:
Ooooohhhhh, didn't occur to me that that information would be dd'd! Crud! Guess I'm off to do some partition copies!
No need for anything that drastic. You could just do something like use e2label to give the partitions symbolic labels (different on each disk) and change fstab to use LABEL= instead of UUID=. I think there is even a tool that lets you change the UUID, but I don't remember the name or how to use it :-).
Yea, and I'll end up doing that, but the problem is that I've done some yum installs and yum updates and, of course, reading mail, browsing the internet, etc., and there are now new files here and there on cross partitions that need to be good to go on, at least, one of the two disks. Then I can do the UUID changes and make sure that I boot from the disk where all of the partitions are current. I'm thinking I *may* be able to rsync partitions, copying "newer" files back and forth (probably after booting into Knoppix). That should do it. I'll have to think about it some more and decide on how to do this.
Thanks.
Kevin
Interesting thread. :)
I would like to know a bit more about your process for booting knoppix (which version/edition, too) and rsync'ing between the two partitions. Thanks.
From: Kevin Martin kevintm@ameritech.net To: Community support for Fedora users users@lists.fedoraproject.org Sent: Thursday, September 29, 2011 11:36 AM Subject: Re: I've got an interesting problem (at least to me).....
On 09/29/2011 10:27 AM, Tom Horsley wrote:
On Thu, 29 Sep 2011 09:57:17 -0500 Kevin Martin wrote:
Ooooohhhhh, didn't occur to me that that information would be dd'd! Crud! Guess I'm off to do some partition copies!
No need for anything that drastic. You could just do something like use e2label to give the partitions symbolic labels (different on each disk) and change fstab to use LABEL= instead of UUID=. I think there is even a tool that lets you change the UUID, but I don't remember the name or how to use it :-).
Yea, and I'll end up doing that, but the problem is that I've done some yum installs and yum updates and, of course, reading mail, browsing the internet, etc., and there are now new files here and there on cross partitions that need to be good to go on, at least, one of the two disks. Then I can do the UUID changes and make sure that I boot from the disk where all of the partitions are current. I'm thinking I *may* be able to rsync partitions, copying "newer" files back and forth (probably after booting into Knoppix). That should do it. I'll have to think about it some more and decide on how to do this.
Thanks.
Kevin
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On 09/29/2011 10:45 AM, Joe Wulf wrote:
Interesting thread. :)
I would like to know a bit more about your process for booting knoppix (which version/edition, too) and rsync'ing between the two partitions. Thanks.
------------------------------------------------------------------------------------------------------------------------------------ *From:* Kevin Martin <kevintm@ameritech.net> *To:* Community support for Fedora users <users@lists.fedoraproject.org> *Sent:* Thursday, September 29, 2011 11:36 AM *Subject:* Re: I've got an interesting problem (at least to me)..... On 09/29/2011 10:27 AM, Tom Horsley wrote: > On Thu, 29 Sep 2011 09:57:17 -0500 > Kevin Martin wrote: > >> Ooooohhhhh, didn't occur to me that that information would be dd'd! Crud! Guess I'm off to do some partition copies! > No need for anything that drastic. You could just do something like > use e2label to give the partitions symbolic labels (different > on each disk) and change fstab to use LABEL= instead of UUID=. > I think there is even a tool that lets you change the UUID, > but I don't remember the name or how to use it :-). Yea, and I'll end up doing that, but the problem is that I've done some yum installs and yum updates and, of course, reading mail, browsing the internet, etc., and there are now new files here and there on cross partitions that need to be good to go on, at least, one of the two disks. Then I can do the UUID changes and make sure that I boot from the disk where all of the partitions are current. I'm thinking I *may* be able to rsync partitions, copying "newer" files back and forth (probably after booting into Knoppix). That should do it. I'll have to think about it some more and decide on how to do this. Thanks. Kevin -- users mailing list users@lists.fedoraproject.org <mailto:users@lists.fedoraproject.org> To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
ok, so what I ultimately did was boot into Knoppix, grab a program called "meld", make it, and then "meld" the equivalent partitions (after mounting them under /media). This gave me a long diff'd list of changes on the two filesystems and then I manually picked and chose which files to move over to my "main" hard drive. I really wanted to use kdiff3 but it became a huge PITA trying to get it compiled under Knoppix. I then made sure to reset my UUID's on the secondary drive (tune2fs -U random /dev/sdb[#]) so when I rebooted I was back on only one drive for all of my mount points. Then, just for the sake of doing it, I did an "rpm --rebuilddb" and a "yum update". I only now have one problem with nouveau but I'm hoping the update fixed that.
Kevin
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Joe Wulf -
Kevin Martin -
Tom Horsley