Discuss June 2005

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362 discussions

Re: [CentOS] A questiong about replacing my failing drive
by Bryan J. Smith <b.j.smith＠ieee.org> 14 Jun '05

14 Jun '05

From: Joshua Baker-LePain <jlb17(a)duke.edu> > The canonical reasons I've heard are 1) they don't want to spend the > money/time/resources to acquire enough XFS expertise to support it at the > Enterprise level I could think of 2 guys they could easily snatch away from SGI that could bring such experience -- pretty much the 2 behind much of the VFS in kernel 2.6 anyway (so great resources regardless). > and 2) besides, as of RHEL4 (they claim), XFS doesn't provide anything > ext3 already provides, so why bother. Feature-wise, probably not. The VFS in 2.6 brings a lot of former XFS-only features to _all_ filesystems. But I still see serious size limitations as well as scalability to Ext3 versus XFS. > Yes, I've pointed out on official Red Hat mailing lists that 2 is false > due (at least) to the issue of backing up ACLs (use star they say -- no > thanks, Well, Red Hat has shipped Jorg's "star" in RHL8 on-ward to address this. > say I), but I got no response to that. And I've got benchmarks > showing XFS pretty handily beating ext3 on nice new hardware, but I > don't have much faith that would get any response either. To me, I really could care less about benchmarks except when real performance issues arise. All throughout 2.4, every other filesystem -- Ext3, JFS (from OS/2**), ReiserFS, etc... required hack after hack after hack. XFS, with its "core" additions to kernel 2.4 provided _everything_ standard from day 1 -- Quotas, POSIX EA/ACLs, etc... It was ported directly from Irix, and was _entirely_ GPL -- which you'd figure that's something Red Hat likes. The only bug that it ever ran into, which resulted in XFS 1.1, was something that bit me on 2 /var filesystems. Otherwise XFS, like Ext3 but _unlike_ JFS or ReiserFS, benefits from being the _exact_ _same_ organization for 10+ years. Which means not only is its on-line operation well-trusted, but it's off-line fsck/repair as well (something that plagues ReiserFS heavily due to design focus). Because I could care less how a filesystem works when it works. I want to know what happens when its inconsistent, and a journal reply won't solve the problem. I trust e2fsck and xfs_repair. -- Bryan J. Smith mailto:b.j.smith@ieee.org

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Re: [CentOS] A questiong about replacing my failing drive
by Bryan J. Smith <b.j.smith＠ieee.org> 14 Jun '05

14 Jun '05

Alexander Dalloz wrote: > On the Fedora user list the question came up whether dump & restore are > extended attributes aware. This is an issue i.e. when using SELinux. Do > the tools take care? Since 2002, this is the #1 reason I've been advocating that Red Hat adopt XFS as its' 2nd, officially supported filesystem. xfsdump for XFS does this, and always has. You don't have to use "getfacl" to save POSIX ACLs (although that was always an option, even back in the early 2.4.x days for XFS). Everything (short of SGI-integrated hardware API support) came over from Irix in XFS for Linux, and that included POSIX ACLs, Quotas, etc... This is in stark contrast from IBM JFS which came from OS/2 instead of AIX (because of the legal issues with Monterey), and ReiserFS is a non-traditional UNIX design (I won't go there, even if it is very innovative in most respects). Most of these features in kernel 2.6 ere thanx to the SGI XFS team, and the team also worked with the Ext3 and Linux & co. as of 2.5.3+ in ensuring POSIX EAs were uniform across all filesystems c/o the VFS. I haven't wanted to bother Tweedie and/or Red Hat in getting an explaination why they aren't looking at supporting XFS, but I think it would solve a lot of scalability issues. I always assumed it wasn't merely a "NIH" attitude, and they had real reasons for not wanting to support it until Ext3 proved to be a serious limitation for them. Rodrigo Barbosa wrote: > That depends very much on what you are calling extended attributes. > I have no experience with SELinux, so I really can't make an > educated guess on what you are talking about. > Care to enlight me ? I have to be honest, I've never used xfsdump and verified SELinux attributes were preserved. But it should bring _all_ POSIX EAs with it. I've just typically relied on it for ACLs. -- Bryan J. Smith mailto:b.j.smith@ieee.org

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A questiong about replacing my failing drive
by Doug Eubanks 14 Jun '05

14 Jun '05

First, I am not a RedHat or linux newbie. I simply have not had to do what I am getting ready to do, and I want to see if I am going to run into a problems... My HDA drive is failing (I can hear the occasional click from it and I am seeing Smart errors, the transfer rate is slow but all my data is there). I have 3 partitions on it, the /, /boot/ and my game servers (this is also the drive the bootloader is on). Will this proceedure work ok to replace it with the minimum of downtime/reinstalling A> Make bootable floppy B> Start in single user mode C> Create same partition structure on hew drive D> Move all files from old partitions to new partitions E> Switch drives F> Boot off floppy, mount, reinstall grub and boot manager on new drive G> Profit! Any hangups or snags doing it this way? Thanks, Doug Eubanks doug(a)simflex.com

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SUCCESS! [CentOS] Help rebuilding kernel get mount error on reboot
by Jerry Geis 14 Jun '05

14 Jun '05

John, Was there a reason for the (2) make oldconfigs? just curious This all worked rpm -i kernel.XXX.src.rpm cd /usr/src/redhat/SPECS rpmbuild -bp --target i686 kernel.XXX.spec cd /usr/src/redhat/BUILD/kernel-2.6.9/linux-2.6.9 make mrproper cp /boot/config-2.6.9-11.EL .config make oldconfig make oldconfig make menuconfig Device Drivers -> Character Devices -> Serial Drivers change Max number of non legacy 8250_NR_UARTS to 36 make bzImage make modules make modules_install make install On Tue, 2005-06-14 at 12:23 -0500, Jerry Geis wrote: >/ Still no go.... />/ />/ I have downloaded the SRC rpm for kernel-2.6.9-11.EL.src.rpm />/ <http://mirror.centos.org/centos/4.1/os/SRPMS/kernel-2.6.9-11.EL.src.rpm> />/ I did rpm -i kernel....src.rpm />/ cd /usr/src/redhat/SPECS />/ rpmbuild -bp --target i686 kernel.xxx.src.rpm />/ cd /usr/src/redhat/BUILD/kernel.XXX/linux.XXX />/ make bzImage />/ make modules_install />/ make install />/ />/ When I reboot I get the same error about />/ />/ "mount: error 19 mounting ext3" />/ />/ Where should I go from here? / Go into the directory ... do: make mrproper cp /boot/config-xxxx . make oldconfig make oldconfig make menuconfig (adjust what you want) make bzImage make modules make modules_install make install

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Help rebuilding kernel get mount error on reboot
by Jerry Geis 14 Jun '05

14 Jun '05

Still no go.... I have downloaded the SRC rpm for kernel-2.6.9-11.EL.src.rpm <http://mirror.centos.org/centos/4.1/os/SRPMS/kernel-2.6.9-11.EL.src.rpm> I did rpm -i kernel....src.rpm cd /usr/src/redhat/SPECS rpmbuild -bp --target i686 kernel.xxx.src.rpm cd /usr/src/redhat/BUILD/kernel.XXX/linux.XXX make bzImage make modules_install make install When I reboot I get the same error about "mount: error 19 mounting ext3" Where should I go from here? Thanks, Jerry

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Help rebuilding kernel get mount error on reboot
by Jerry Geis 14 Jun '05

14 Jun '05

I must have had an incomplete download- I downloaded again and no more error. Jerry ------------ john, when installing the src.rpm for the kernel it says bad key ID. jerry On Tue, 2005-06-14 at 10:32 -0500, Johnny Hughes wrote: >// On Tue, 2005-06-14 at 10:05 -0500, Jerry Geis wrote: //>/ > I am attempting to recompile the kernel with the following steps. />/ > />/ > Install kernel-sourcecode rpm />/ > />/ > cd /usr/src/linux-2.6.9-11.EL />/ > cp /boot/config-2.6.9-11.EL .config />/ > make menuconfig />/ > Device Drivers -> Character Devices -> Serial Drivers />/ > change Max number of non legacy 8250_NR_UARTS to 36 />/ > make bzImage />/ > make modules_install />/ > make install />/ > />/ > Then after rebooting and selecting my -custom image from the above compile />/ > />/ > "mount: error 19 mounting ext3" />/ > "mount: error 2 mounting none" />/ > />/ > Then the machine stops of source. />/ > />/ > What happended? How do I get my custom kernel to boot. />/ />/ Jerry, />/ />/ The kernel-sourcecode package (it is no-arch) doesn't always apply all />/ kernel patches for the arch in question. I actually think it is kind of />/ worthless and we will probably stop including it. />/ />/ Try this instead :) />/ />/ Download the kernel-xxxxx.src.rpm />/ />/ do: />/ />/ rpm -Uvh kernel-xxxxx.src.rpm />/ />/ go to the SPECS directory and do this: />/ />/ rpmbuild -bp --target i686 kernel-xxx.spec />/ />/ then go to the BUILD directory and go down to the kernel directory and />/ build there. />/ />/ (substitute the versions for xxxxx ... also

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Help rebuilding kernel get mount error on reboot
by Jerry Geis 14 Jun '05

14 Jun '05

john, when installing the src.rpm for the kernel it says bad key ID. jerry On Tue, 2005-06-14 at 10:32 -0500, Johnny Hughes wrote: >/ On Tue, 2005-06-14 at 10:05 -0500, Jerry Geis wrote: />/ > I am attempting to recompile the kernel with the following steps. />/ > />/ > Install kernel-sourcecode rpm />/ > />/ > cd /usr/src/linux-2.6.9-11.EL />/ > cp /boot/config-2.6.9-11.EL .config />/ > make menuconfig />/ > Device Drivers -> Character Devices -> Serial Drivers />/ > change Max number of non legacy 8250_NR_UARTS to 36 />/ > make bzImage />/ > make modules_install />/ > make install />/ > />/ > Then after rebooting and selecting my -custom image from the above compile />/ > />/ > "mount: error 19 mounting ext3" />/ > "mount: error 2 mounting none" />/ > />/ > Then the machine stops of source. />/ > />/ > What happended? How do I get my custom kernel to boot. />/ />/ Jerry, />/ />/ The kernel-sourcecode package (it is no-arch) doesn't always apply all />/ kernel patches for the arch in question. I actually think it is kind of />/ worthless and we will probably stop including it. />/ />/ Try this instead :) />/ />/ Download the kernel-xxxxx.src.rpm />/ />/ do: />/ />/ rpm -Uvh kernel-xxxxx.src.rpm />/ />/ go to the SPECS directory and do this: />/ />/ rpmbuild -bp --target i686 kernel-xxx.spec />/ />/ then go to the BUILD directory and go down to the kernel directory and />/ build there. />/ />/ (substitute the versions for xxxxx ... also use the correct --target for />/ the kernel you are trying to compile) This will get all the target />/ related patches applied./

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Help rebuilding kernel get mount error on reboot
by Jerry Geis 14 Jun '05

14 Jun '05

John, Thanks for the info. I am having trouble with the downloading of the src.rpm. Is that just on the mirrors somewhere or is there an easy place to grab the i686.src.rpm? I tried "rpm -Uvh kernel-2.6.9-11.EL.src.rpm" and got an error. Where on the mirrors is the i686.src.rpm? THanks, Jerry On Tue, 2005-06-14 at 10:05 -0500, Jerry Geis wrote: >/ I am attempting to recompile the kernel with the following steps. />/ />/ Install kernel-sourcecode rpm />/ />/ cd /usr/src/linux-2.6.9-11.EL />/ cp /boot/config-2.6.9-11.EL .config />/ make menuconfig />/ Device Drivers -> Character Devices -> Serial Drivers />/ change Max number of non legacy 8250_NR_UARTS to 36 />/ make bzImage />/ make modules_install />/ make install />/ />/ Then after rebooting and selecting my -custom image from the above compile />/ />/ "mount: error 19 mounting ext3" />/ "mount: error 2 mounting none" />/ />/ Then the machine stops of source. />/ />/ What happended? How do I get my custom kernel to boot. / Jerry, The kernel-sourcecode package (it is no-arch) doesn't always apply all kernel patches for the arch in question. I actually think it is kind of worthless and we will probably stop including it. Try this instead :) Download the kernel-xxxxx.src.rpm do: rpm -Uvh kernel-xxxxx.src.rpm go to the SPECS directory and do this: rpmbuild -bp --target i686 kernel-xxx.spec then go to the BUILD directory and go down to the kernel directory and build there. (substitute the versions for xxxxx ... also use the correct --target for the kernel you are trying to compile) This will get all the target related patches applied.

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Help rebuilding kernel get mount error on reboot
by Jerry Geis 14 Jun '05

14 Jun '05

THe size of the ramdisk is not even close to the original. Which since I am using the same config I would have thought it to be the same size. initrd.2.6.9-11.ELcustom 307K initrd.2.6.9-11.EL 390K Jerry ------------------------ That is supposed to happen in the "make install". In fact I looked at /boot and it is there. Jerry On Tue, Jun 14, 2005 at 10:05:36AM -0500, Jerry Geis wrote: >// I am attempting to recompile the kernel with the following steps. //>/ />/ Install kernel-sourcecode rpm />/ />/ cd /usr/src/linux-2.6.9-11.EL />/ cp /boot/config-2.6.9-11.EL .config />/ make menuconfig />/ Device Drivers -> Character Devices -> Serial Drivers />/ change Max number of non legacy 8250_NR_UARTS to 36 />/ make bzImage />/ make modules_install />/ make install / you forgot to rebuild the ramdisk ? mkinitrd ... Tru

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Help rebuilding kernel get mount error on reboot
by Jerry Geis 14 Jun '05

14 Jun '05

That is supposed to happen in the "make install". In fact I looked at /boot and it is there. Jerry On Tue, Jun 14, 2005 at 10:05:36AM -0500, Jerry Geis wrote: >/ I am attempting to recompile the kernel with the following steps. />/ />/ Install kernel-sourcecode rpm />/ />/ cd /usr/src/linux-2.6.9-11.EL />/ cp /boot/config-2.6.9-11.EL .config />/ make menuconfig />/ Device Drivers -> Character Devices -> Serial Drivers />/ change Max number of non legacy 8250_NR_UARTS to 36 />/ make bzImage />/ make modules_install />/ make install / you forgot to rebuild the ramdisk ? mkinitrd ... Tru --

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Discuss June 2005