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Postings by Keith Keller

boot issue with latest kernel

Hi all,

Has anyone seen this issue before? This afternoon, I tried updating a
bare metal CentOS 6 box, and got some odd error messages on the console
during booting kernel 2.6.32-754.11.1. (These aren't exact, I forgot
to try to get a photo of the console.)

sd 0:0:4:0 timed out resetting card
3w-sas timed out resetting card

Then the boot would simply hang, with no obvious disk activity on the
drives and no other messages on the console. Reverting back to an
earlier kernel (2.6.32-431.17.1) was perfectly fine.

broadcom and centos 7

Hi all,

A year or two ago, I installed CentOS 7.0 (or 7.1) on an old MacBook
Pro, and compiled the Broadcom drivers as documented here:

<a href="https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom" title="https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom">https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom</a>

After not using it for a while, I recently resurrected it, and updated
to 7.4. Unfortunately that page has not been updated in a while, so
only documents compiling for 7.3.

installer with centosplus kernel?

Hi all,

Is there any way to get a CentOS 7 ISO with the centosplus kernel? I
have some very old hardware I'd like to keep going if easy, but it has
old NVidia network cards that need the forcedeth driver. Apparently
this driver is now in the centosplus kernel, but if I use the default
ISO I won't be able to get on the network to get the centosplus kernel.
(Of course I can get the kernel to the machine in other ways, but over
the network is by far the most convenient.)

See <a href="https://bugs.centos.org/view.php?id=7359" title="https://bugs.centos.org/view.php?id=7359">https://bugs.centos.org/view.php?id=7359</a> for more details.

centos 7 on older macbook pro

Hi all,

I recently got a brand new MacBook Pro, replacing one that is over 5.5
years old. I'm trying to think of something to do with the old laptop,
and one idea I had was to put CentOS on it. After some initial
struggles, I finally found this page, which tells how to tell the
installer to find hfsplus-utils:

<a href="https://bugs.centos.org/view.php?id=7327" title="https://bugs.centos.org/view.php?id=7327">https://bugs.centos.org/view.php?id=7327</a>

Then I got to the point of configuring wifi, and of course being a MBP,
it has a proprietary Broadcom interface.

XFS, inode64, and remount

Hi all,

I was recently poking more into the inode64 mount option for XFS
filesystems. I seem to recall a comment that you could remount a
filesystem with inode64, but then a colleague ran into issues where he
did that but was still out of inodes. So, I did more research, and
found this posting to the XFS list:

<a href="http://oss.sgi.com/archives/xfs/2008-05/msg01409.html" title="http://oss.sgi.com/archives/xfs/2008-05/msg01409.html">http://oss.sgi.com/archives/xfs/2008-05/msg01409.html</a>

So for people checking the CentOS list archives, I hope this comes up in
a search.

which kernel do people use?

Hi all,

I'm doing a very informal and unscientific poll: which kernel do you use
on your CentOS machines? Not which version of the CentOS kernel, but
which repository. Here are some examples I can think of off the top of
my head:

==CentOS stock
==build own from CentOS SRPMs
==kernel-ml (from ELRepo)
==kernel-lt (from ELRepo)
==OpenVZ kernel
==build own from kernel.org
==other?

One reason I'm curious is that on occasion there are features that I
would like to have from a newer kernel (e.g., --want-replacement from
md) that (AFAICT) are not in the stock CentOS kernel.

trouble with crash utility

Hi all,

I recently had an issue where, running kernel 2.6.32-358.11.1, the box
would be up for about five minutes, then would crash and reboot. kdump
saved the vmcore files, so I was hoping to run crash against them to see
why this was occurring.

maintaining patches across releases

Hi all,

I have what might be a foolish question about patching packages. I am
not sure exactly how to phrase the question, so please follow up if it
seems as though I'm not being clear.

I was looking at this bug which my machines are currently experiencing:

<a href="https://bugzilla.redhat.com/show_bug.cgi?id=883905" title="https://bugzilla.redhat.com/show_bug.cgi?id=883905">https://bugzilla.redhat.com/show_bug.cgi?id=883905</a>

The proposed patch is literally one new line in the XFS codebase. So
since the patch is so straightforward, I had a crazy idea that I would
build my own kernel with this patch, and test it out to see if it
worked.

mdadm: hot remove failed for /dev/sdg: Device or resource busy

Hello all,

I have run into a sticky problem with a failed device in an md array,
and I asked about it on the linux raid mailing list, but since the
problem may not be md-specific, I am hoping to find some insight here.
(If you are on the MD list, and are seeing this twice, I humbly
apologize.)

The summary is that during a reshape of a raid6 on an up to date CentOS
6.3 box, one disk failed, and was marked as such in the array, but is
not allowing me to remove it:

# mdadm /dev/md127 --fail /dev/sdg
mdadm: set /dev/sdg faulty in /dev/md127
# mdadm /dev/md127 --remove /dev/sdg
mdadm: hot remove

new "large" fileserver config questions

Hi all,

I was recently charged with configuring a new fairly large (24x3TB
disks) fileserver for my group. I think I know mostly what I want to do
with it, but I did have two questions, at least one of which is directly
related to CentOS.

1) The controller node has two 90GB SSDs that I plan to use as a
bootable RAID1 system disk. What is the preferred method for laying
out the RAID array? I found this document on the wiki:

<a href="http://wiki.centos.org/HowTos/Install_On_Partitionable_RAID1" title="http://wiki.centos.org/HowTos/Install_On_Partitionable_RAID1">http://wiki.centos.org/HowTos/Install_On_Partitionable_RAID1</a>

But that seems like it's somewhat nonstandard.

trouble booting install CD on old machine

Hi all,

I'm having a bit of an issue booting the full 5.7 install CD on an older
machine. I downloaded the ISOs earlier today, checked the sha1sums, and
burned the CDs with no reported errors. But when I try to boot, the
isolinux banner comes up quickly, but then instead of the boot prompt, I
get a completely blank screen.

OT: clear error from premature disk removal from LVM

Hi all,

This question is only slightly ontopic, in that the host system is a
CentOS 5 box, but is otherwise a fairly generic question. I've looked
in so many different places for an answer, but haven't had much luck,
so I'm hoping someone here has some advice. (for the record: I posted
this question to comp.os.linux.misc a few weeks ago)

===

I made a minor mistake recently, and am trying to determine the cleanest
way to clear it. Attached to my hardware RAID controller were two RAID6
units.

how is "binary compatibility" determined?

Hi all!

We've seen quite a few references on the list to "100% binary
compatibility with upstream". What I am curious about is, how precisely
is this determined? All the ways I can think of for comparing how two
systems might work seem flawed in some way (e.g., using some sort of
checksum; unit testing; verifying build parameters). I did some
searches both at centos.org and google, but couldn't find anything
specific about the test(s) used to determine compatibility.

I have no particular reason for asking, other than wanting to be able to
explain it to others if someone asks me.

--keith

kickstart and grub parameters

Hey list,

I recently started working with kickstart. It is awesome! I really had
no idea how easy it would be to use.

I do have one strange issue, that's really not that important, but that
I'd like to figure out. I like to watch all the kernel boot messages go
by in text mode by default, and when I've set up a box in the past, I've
modified grub's menu.lst file to remove all the GUI components of the
boot.