Hello: I'm using fedora 11 for some days with ext3, now I want to try with ext4. Is it possible to convert all my ext3 partition to ext4?
Thank you.. masch...
On Sun, Mar 29, 2009 at 20:26:56 -0300, Mario Chacon the.masch@gmail.com wrote:
Hello: I'm using fedora 11 for some days with ext3, now I want to try with ext4. Is it possible to convert all my ext3 partition to ext4?
Yes. http://kernelnewbies.org/Ext4#head-3891522e0601162aab24c73c1f148a1e28c6a9d4
Bruno Wolff III wrote:
On Sun, Mar 29, 2009 at 20:26:56 -0300, Mario Chacon the.masch@gmail.com wrote:
Hello: I'm using fedora 11 for some days with ext3, now I want to try with ext4. Is it possible to convert all my ext3 partition to ext4?
Yes. http://kernelnewbies.org/Ext4#head-3891522e0601162aab24c73c1f148a1e28c6a9d4
although note the caveats there. Existing files will not change their disk format to use extents... so it's not quite the same as if you had just done ext4 from scratch. Still worth testing, though, and should still be beneficial.
-Eric
Ok, thank you... How can I do it with the / partition? It's mounted and with a mounted unit I get this warning: WARNING!!! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage. Is it possible to make it with the live cd alpha?
Salu2... masch...
On Sun, Mar 29, 2009 at 9:55 PM, Eric Sandeen sandeen@redhat.com wrote:
Bruno Wolff III wrote:
On Sun, Mar 29, 2009 at 20:26:56 -0300, Mario Chacon the.masch@gmail.com wrote:
Hello: I'm using fedora 11 for some days with ext3, now I want to try with
ext4. Is
it possible to convert all my ext3 partition to ext4?
Yes.
http://kernelnewbies.org/Ext4#head-3891522e0601162aab24c73c1f148a1e28c6a9d4
although note the caveats there. Existing files will not change their disk format to use extents... so it's not quite the same as if you had just done ext4 from scratch. Still worth testing, though, and should still be beneficial.
-Eric
On 2009-03-30, 01:31 GMT, Mario Chacon wrote:
How can I do it with the / partition? It's mounted and with a mounted unit I get this warning: WARNING!!! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage. Is it possible to make it with the live cd alpha?
Use the installation CD/DVD/LiveCD/etc. and boot into Rescue mode. Then you have your system with your root-fs-when-really-booted being something else than /. Do changes there, and reboot. Check four times that /etc/fstab is correct.
Matěj
2009/3/30 Matej Cepl mcepl@redhat.com:
On 2009-03-30, 01:31 GMT, Mario Chacon wrote:
How can I do it with the / partition? It's mounted and with a mounted unit I get this warning: WARNING!!! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage. Is it possible to make it with the live cd alpha?
Use the installation CD/DVD/LiveCD/etc. and boot into Rescue mode. Then you have your system with your root-fs-when-really-booted being something else than /. Do changes there, and reboot. Check four times that /etc/fstab is correct.
Matěj
-- fedora-test-list mailing list fedora-test-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list
One stupid question:
Is ext4 "production-ready"? I know it was declared stable in 2.6.28 but I still see more ext4 patches than ext3 in the kernel. Maybe it's just because ext4 is newer? Is ext4 ready to fully replace ext3 without any data losses? What about mission-critical machines or should we wait untill 2.6.31 just to be sure?
On 2009-03-30, 09:54 GMT, Joshua C. wrote:
Is ext4 "production-ready"? I know it was declared stable in 2.6.28 but I still see more ext4 patches than ext3 in the kernel. Maybe it's just because ext4 is newer? Is ext4 ready to fully replace ext3 without any data losses? What about mission-critical machines or should we wait untill 2.6.31 just to be sure?
If you have mission-critical machines, then you don't use Fedora for them anyway, right? ;-) Then you should install RHEL 5.3 (or some of its variants) which has ext4 as a Technology Preiew (i.e., not supported by RH yet).
Make your own conclusions. However, as with all similar situation, no-one will do testing of your needs for you.
Matěj
2009/3/30 Matej Cepl mcepl@redhat.com:
On 2009-03-30, 09:54 GMT, Joshua C. wrote:
Is ext4 "production-ready"? I know it was declared stable in 2.6.28 but I still see more ext4 patches than ext3 in the kernel. Maybe it's just because ext4 is newer? Is ext4 ready to fully replace ext3 without any data losses? What about mission-critical machines or should we wait untill 2.6.31 just to be sure?
If you have mission-critical machines, then you don't use Fedora for them anyway, right? ;-) Then you should install RHEL 5.3 (or some of its variants) which has ext4 as a Technology Preiew (i.e., not supported by RH yet).
Make your own conclusions. However, as with all similar situation, no-one will do testing of your needs for you.
Matěj
-- fedora-test-list mailing list fedora-test-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list
You're right. I'm also considering switching to ext4 (home pc) with f11 but i don't wan't to spend time figuring out what's wrong if something really goes wrong. there are othe threads in the enternet but no ditro is shipping with ext4 as default. And I'm wondering if it's so much better then the good old ext3.
Joshua C. wrote:
2009/3/30 Matej Cepl mcepl@redhat.com:
On 2009-03-30, 09:54 GMT, Joshua C. wrote:
Is ext4 "production-ready"? I know it was declared stable in 2.6.28 but I still see more ext4 patches than ext3 in the kernel. Maybe it's just because ext4 is newer? Is ext4 ready to fully replace ext3 without any data losses? What about mission-critical machines or should we wait untill 2.6.31 just to be sure?
If you have mission-critical machines, then you don't use Fedora for them anyway, right? ;-) Then you should install RHEL 5.3 (or some of its variants) which has ext4 as a Technology Preiew (i.e., not supported by RH yet).
Make your own conclusions. However, as with all similar situation, no-one will do testing of your needs for you.
Matěj
-- fedora-test-list mailing list fedora-test-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list
You're right. I'm also considering switching to ext4 (home pc) with f11 but i don't wan't to spend time figuring out what's wrong if something really goes wrong. there are othe threads in the enternet but no ditro is shipping with ext4 as default. And I'm wondering if it's so much better then the good old ext3.
Fedora 11 is shipping with ext4 as default. :)
As to whether it's better, it is in many ways, but it's up to you to determine that for your use case of course.
-Eric
Joshua C. wrote:
2009/3/30 Matej Cepl mcepl@redhat.com:
On 2009-03-30, 01:31 GMT, Mario Chacon wrote:
How can I do it with the / partition? It's mounted and with a mounted unit I get this warning: WARNING!!! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage. Is it possible to make it with the live cd alpha?
Use the installation CD/DVD/LiveCD/etc. and boot into Rescue mode. Then you have your system with your root-fs-when-really-booted being something else than /. Do changes there, and reboot. Check four times that /etc/fstab is correct.
Matìj
-- fedora-test-list mailing list fedora-test-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list
One stupid question:
Is ext4 "production-ready"? I know it was declared stable in 2.6.28 but I still see more ext4 patches than ext3 in the kernel. Maybe it's just because ext4 is newer? Is ext4 ready to fully replace ext3 without any data losses? What about mission-critical machines or should we wait untill 2.6.31 just to be sure?
When I installed F10, I installed ext4 on my data drives. I have moved back to ext3 after reading reports of data loss with ext4.
http://www.h-online.com/open/Possible-data-loss-in-Ext4--/news/112821
http://www.linux-magazine.com/online/news/linus_torvalds_upset_over_ext3_and...
It has to do with the write delays and the way the data is written to the disk. I didn't want to risk it.
On Tue, Mar 31, 2009 at 12:32 PM, Rahul Sundaram sundaram@fedoraproject.org wrote:
Robin Laing wrote:
It has to do with the write delays and the way the data is written to the disk. I didn't want to risk it.
The fixes for these issues have long since been in rawhide.
And in F10 also?
On Tue, Mar 31, 2009 at 12:13 PM, Robin Laing Robin.Laing@drdc-rddc.gc.ca wrote:
When I installed F10,
jerry
Jerry Amundson wrote:
On Tue, Mar 31, 2009 at 12:32 PM, Rahul Sundaram sundaram@fedoraproject.org wrote:
Robin Laing wrote:
It has to do with the write delays and the way the data is written to the disk. I didn't want to risk it.
The fixes for these issues have long since been in rawhide.
And in F10 also?
Will be when 2.6.29 hits F10.
F10 still had ext4 as a "hidden" fs option, remember, it was a bit more of a test fs at that point. We do make efforts to keep things working well in F10 (Thanks esp. to Chuck!) but F10 ext4 wasn't expected to be without some potential flaws.
In the larger picture, I have yet to hear a complaint about this sort of buffered data loss on a crash on ext4 in Fedora. At least no bugs have been filed over it.
Remember guys, this is fedora-test-list; posting things like "does it work?" or "I'm afraid it may not work so I'm not using it" here strikes me as odd. You can help root out these or issues by testing it, now, before F11 goes gold.
Thanks, -Eric
Eric Sandeen wrote:
Jerry Amundson wrote:
On Tue, Mar 31, 2009 at 12:32 PM, Rahul Sundaram sundaram@fedoraproject.org wrote:
Robin Laing wrote:
It has to do with the write delays and the way the data is written to the disk. I didn't want to risk it.
The fixes for these issues have long since been in rawhide.
And in F10 also?
Will be when 2.6.29 hits F10.
F10 still had ext4 as a "hidden" fs option, remember, it was a bit more of a test fs at that point. We do make efforts to keep things working well in F10 (Thanks esp. to Chuck!) but F10 ext4 wasn't expected to be without some potential flaws.
When I installed my F10, it was an option to use EXT4 so I used it.
I have had strange crashes but I think they are a combination of hardware and timing issues, not Fedora directly. I cannot say what data has been lost, if any due to using EXT4.
Jerry Amundson wrote:
On Tue, Mar 31, 2009 at 12:32 PM, Rahul Sundaram sundaram@fedoraproject.org wrote:
Robin Laing wrote:
It has to do with the write delays and the way the data is written to the disk. I didn't want to risk it.
The fixes for these issues have long since been in rawhide.
And in F10 also?
The patches I was referring to are at
http://cvs.fedoraproject.org/viewvc/rpms/kernel/devel/linux-2.6-ext4-flush-o...
They don't seem to be in the Fedora 10 branch yet.
Rahul
Matej Cepl wrote:
On 2009-03-30, 01:31 GMT, Mario Chacon wrote:
How can I do it with the / partition? It's mounted and with a mounted unit I get this warning: WARNING!!! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage. Is it possible to make it with the live cd alpha?
Use the installation CD/DVD/LiveCD/etc. and boot into Rescue mode. Then you have your system with your root-fs-when-really-booted being something else than /. Do changes there, and reboot. Check four times that /etc/fstab is correct.
and don't forget to remake your initrd.
FWIW there is supposed to be an ext3->ext4 migration via anaconda if you boot with "ext4migrate" on the cmdline.
-Eric
Matěj
On Mon, 2009-03-30 at 08:55 -0500, Eric Sandeen wrote:
FWIW there is supposed to be an ext3->ext4 migration via anaconda if you boot with "ext4migrate" on the cmdline.
Hmm, by definition an 'update' - and failure is not an option - can't go back to FC10.
Testing of this option on Anaconda would include having a FC10 whole disk image - to re-image disks for the next test.
Bob Gustafson wrote:
On Mon, 2009-03-30 at 08:55 -0500, Eric Sandeen wrote:
FWIW there is supposed to be an ext3->ext4 migration via anaconda if you boot with "ext4migrate" on the cmdline.
Hmm, by definition an 'update' - and failure is not an option - can't go back to FC10.
Testing of this option on Anaconda would include having a FC10 whole disk image - to re-image disks for the next test.
Yep. I guess I missed the FC10 part.
-Eric
On Monday 30 March 2009 15:12:35 Eric Sandeen wrote:
Bob Gustafson wrote:
On Mon, 2009-03-30 at 08:55 -0500, Eric Sandeen wrote:
FWIW there is supposed to be an ext3->ext4 migration via anaconda if you boot with "ext4migrate" on the cmdline.
Hmm, by definition an 'update' - and failure is not an option - can't go back to FC10.
Testing of this option on Anaconda would include having a FC10 whole disk image - to re-image disks for the next test.
Yep. I guess I missed the FC10 part.
If I have a large partition that I want to share access to from both an F10 install and a test install of F11 in a separate partition, will I still be able to mount the shared partition safely from F10 after testing this, or if not are there any patches that could be backported to make it so?
On Mon, 2009-03-30 at 09:12 -0500, Eric Sandeen wrote:
Bob Gustafson wrote:
On Mon, 2009-03-30 at 08:55 -0500, Eric Sandeen wrote:
FWIW there is supposed to be an ext3->ext4 migration via anaconda if you boot with "ext4migrate" on the cmdline.
Hmm, by definition an 'update' - and failure is not an option - can't go back to FC10.
Testing of this option on Anaconda would include having a FC10 whole disk image - to re-image disks for the next test.
Yep. I guess I missed the FC10 part.
Also, for testing RAID and ext4migrate, I think the testers will need a disk image for both RAID disks (assuming RAID 1). The data on both disks should be the same, but I think there are differences in the metadata between each disk in a pair. Is this true?
Bob Gustafson wrote:
On Mon, 2009-03-30 at 09:12 -0500, Eric Sandeen wrote:
Bob Gustafson wrote:
On Mon, 2009-03-30 at 08:55 -0500, Eric Sandeen wrote:
FWIW there is supposed to be an ext3->ext4 migration via anaconda if you boot with "ext4migrate" on the cmdline.
Hmm, by definition an 'update' - and failure is not an option - can't go back to FC10.
Testing of this option on Anaconda would include having a FC10 whole disk image - to re-image disks for the next test.
Yep. I guess I missed the FC10 part.
Also, for testing RAID and ext4migrate, I think the testers will need a disk image for both RAID disks (assuming RAID 1). The data on both disks should be the same, but I think there are differences in the metadata between each disk in a pair. Is this true?
The fs metadata on each leg of the mirror should be identical.
-Eric
On Mon, 2009-03-30 at 10:11 -0500, Eric Sandeen wrote:
Bob Gustafson wrote:
On Mon, 2009-03-30 at 09:12 -0500, Eric Sandeen wrote:
Bob Gustafson wrote:
On Mon, 2009-03-30 at 08:55 -0500, Eric Sandeen wrote:
FWIW there is supposed to be an ext3->ext4 migration via anaconda if you boot with "ext4migrate" on the cmdline.
Hmm, by definition an 'update' - and failure is not an option - can't go back to FC10.
Testing of this option on Anaconda would include having a FC10 whole disk image - to re-image disks for the next test.
Yep. I guess I missed the FC10 part.
Also, for testing RAID and ext4migrate, I think the testers will need a disk image for both RAID disks (assuming RAID 1). The data on both disks should be the same, but I think there are differences in the metadata between each disk in a pair. Is this true?
The fs metadata on each leg of the mirror should be identical.
But depending on the RAID used the RAID metadata may not be. If you're preserving images of members for re-tests this will matter (though I'd have thought it would be easier to keep an image of the fs and restore that to the array each time you need to re-test).
Regards, Bryn.
On Mon, 2009-03-30 at 16:19 +0100, Bryn M. Reeves wrote:
On Mon, 2009-03-30 at 10:11 -0500, Eric Sandeen wrote:
Bob Gustafson wrote:
On Mon, 2009-03-30 at 09:12 -0500, Eric Sandeen wrote:
Bob Gustafson wrote:
On Mon, 2009-03-30 at 08:55 -0500, Eric Sandeen wrote:
FWIW there is supposed to be an ext3->ext4 migration via anaconda if you boot with "ext4migrate" on the cmdline.
Hmm, by definition an 'update' - and failure is not an option - can't go back to FC10.
Testing of this option on Anaconda would include having a FC10 whole disk image - to re-image disks for the next test.
Yep. I guess I missed the FC10 part.
Also, for testing RAID and ext4migrate, I think the testers will need a disk image for both RAID disks (assuming RAID 1). The data on both disks should be the same, but I think there are differences in the metadata between each disk in a pair. Is this true?
The fs metadata on each leg of the mirror should be identical.
But depending on the RAID used the RAID metadata may not be. If you're preserving images of members for re-tests this will matter (though I'd have thought it would be easier to keep an image of the fs and restore that to the array each time you need to re-test).
Sounds like a good idea. Using small disks would save time too..
Eric Sandeen wrote:
although note the caveats there. Existing files will not change their disk format to use extents... so it's not quite the same as if you had just done ext4 from scratch. Still worth testing, though, and should still be beneficial.
-Eric
As yum slowly changes everything in the world, will the new files be using ext4?
On Mon, Mar 30, 2009 at 9:06 AM, shmuel siegel fedora@shmuelhome.mine.nu wrote:
Eric Sandeen wrote:
although note the caveats there. Existing files will not change their disk format to use extents... so it's not quite the same as if you had just done ext4 from scratch. Still worth testing, though, and should still be beneficial.
-Eric
As yum slowly changes everything in the world, will the new files be using ext4?
New files yes, old files will use the old format.
Mario Chacon wrote:
I'm using fedora 11 for some days with ext3, now I want to try with ext4. Is it possible to convert all my ext3 partition to ext4?
Be warned that you still need an ext3 (or ext2) /boot, GRUB still does not support ext4. :-(
There's a patch available somewhere, but it hasn't been applied to Fedora's GRUB yet.
Kevin Kofler
2009/3/31 Kevin Kofler kevin.kofler@chello.at:
Be warned that you still need an ext3 (or ext2) /boot, GRUB still does not support ext4. :-(
There's a patch available somewhere, but it hasn't been applied to Fedora's GRUB yet.
Kevin Kofler
Will this patch be applied to grub before f11-final?
Joshua C. wrote:
2009/3/31 Kevin Kofler kevin.kofler@chello.at:
Be warned that you still need an ext3 (or ext2) /boot, GRUB still does not support ext4. :-(
There's a patch available somewhere, but it hasn't been applied to Fedora's GRUB yet.
Kevin Kofler
Will this patch be applied to grub before f11-final?
Unknown. If you'd like to test it, you can try
http://sandeen.fedorapeople.org/grub-ext4-support.patch
or
http://sandeen.fedorapeople.org/grub-0.97-43.fc11.ext4.src.rpm
(that's not totally up to date; koji now has 0.97-44)
There is also a bug for this at:
https://bugzilla.redhat.com/show_bug.cgi?id=486284 [PATCH] RFE: ext4 support in grub
I think it's up to pjones whether we will merge this for f11, but TBH there were more pressing issues than this so it's not had a lot of airtime yet, and post-beta is a "fun" time to make a significant change to the bootloader...
-Eric