Re: [CentOS] odd messages at boot time

[fred roller]

On Mon, Feb 18, 2019, 11:24 AM Fred Smith  I'm getting these messages during boot:
>
> error: failure reading sector 0xfc from 'hd4'
> error: failure reading sector 0xe0 from 'hd4'
> error: failure reading sector 0x0 from 'hd4'
> error: failure reading sector 0xfc from 'hd5'
> error: failure reading sector 0xe0 from 'hd5'
> error: failure reading sector 0x0 from 'hd5'
>
> they pop up soon after the Grub menu with a message to press ENTER to
> continue, and it times out in a few seconds if I don't press ENTER. These
> messages have been appearing for a long time, at least a couple of years
> and I've been too lethargic to investigate til now.
>
> I see no bad side-effects at runtime.
>
> I just did badblocks (read-only) on both sda and sdb (RAID-1 pair)
> which found no errors.
>
> I see nothing obviously related in dmesg, or /var/log/messages.
>
> I also have an external box (Venus DS3R Pro-2) with two drives, also
> RAID-1, that I use for backups. It is seen (after boot) as /dev/sdc.
>
> I'd have to pull the drives out of it and connect them to the SATA bus
> to run badblocks on them, as badblocks won't run on /dev/sdc.
>
> the nightly backups on to this box appear to run without issue.
>
> Anybody got any ideas on what this might be about?
>
> thanks in advance!
>
> Fred
> --
>  Fred Smith -- fre...@fcshome.stoneham.ma.us
> -
> "Not everyone who says to me, 'Lord, Lord,' will enter the kingdom of
>  heaven, but only he who does the will of my Father who is in heaven."
> -- Matthew 7:21 (niv)
> -
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Normally, as you have deduced, it seems to be just bad blocks. But given
that the addresses are identical on both drives I wonder if this is your
mirror? If so could it just be corrupted data?

-- Fred
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[CentOS] odd messages at boot time

[Fred Smith]

I'm getting these messages during boot:

error: failure reading sector 0xfc from 'hd4'
error: failure reading sector 0xe0 from 'hd4'
error: failure reading sector 0x0 from 'hd4'
error: failure reading sector 0xfc from 'hd5'
error: failure reading sector 0xe0 from 'hd5'
error: failure reading sector 0x0 from 'hd5'

they pop up soon after the Grub menu with a message to press ENTER to
continue, and it times out in a few seconds if I don't press ENTER. These
messages have been appearing for a long time, at least a couple of years
and I've been too lethargic to investigate til now.

I see no bad side-effects at runtime.

I just did badblocks (read-only) on both sda and sdb (RAID-1 pair)
which found no errors.

I see nothing obviously related in dmesg, or /var/log/messages.

I also have an external box (Venus DS3R Pro-2) with two drives, also
RAID-1, that I use for backups. It is seen (after boot) as /dev/sdc.

I'd have to pull the drives out of it and connect them to the SATA bus
to run badblocks on them, as badblocks won't run on /dev/sdc.

the nightly backups on to this box appear to run without issue.

Anybody got any ideas on what this might be about?

thanks in advance!

Fred
-- 
 Fred Smith -- fre...@fcshome.stoneham.ma.us -
"Not everyone who says to me, 'Lord, Lord,' will enter the kingdom of
 heaven, but only he who does the will of my Father who is in heaven."
-- Matthew 7:21 (niv) -
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Re: [CentOS] Network switch to IPV6 after PXE boot

[Tru Huynh]

On Mon, Feb 18, 2019 at 06:36:10PM +0100, Patrick Bégou wrote:
...
> 
> - PXE boot start and the desktop load the kernel and the inirtd file
> 
> - the kernel is booted and at this time the led of the network switch
> goes down for the port used by the desktop.
> 
> - then I have a message "no carrier detected on interface em1"
> 
> - followed by " IPv6 ADDRCONF(NETDEV_CHANGED): em1: link become ready
> (and of course the led goes back to green on the switch)

just add "nicdelay=50 linksleep=50" to your kickstart script
(adapt the 50 secondes to your needs)

Cheers

Tru

-- 
Tru Huynh 
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B


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Re: [CentOS] What is the proper place for GDM related dconf settings now?

[James Pearson]

Sean wrote:
> 
> It seems that with CentOS 7.6 and Gnome 3.28, a clean install of a
> Workstation package profile does not build the /etc/dconf/db/gdm.d/
> directory tree.

This is a known issue - see:

  https://access.redhat.com/solutions/3599341

You will need some sort of Redhat support account to see the above page 
- but the 'Resolution' given is:

"Create the /etc/dconf/db/gdm.d/ directory manually. Files in this 
directory are still taken into account."

.. and the "Root Cause" is given as:

"This is by design and as a result of gnome/gdm rebase in RHEL 7.6."


James Pearson
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[CentOS] Network switch to IPV6 after PXE boot

[Patrick Bégou]

I'm trying to autoinstall a DELL 9030 desktop with CentOS7 using PXE and
Kikstart. I fall in a strange problem (I have several other laptop or
desktop using this install process without any problem, kernel and
initrd are from a Centos 7.4 iso)

- PXE boot start and the desktop load the kernel and the inirtd file

- the kernel is booted and at this time the led of the network switch
goes down for the port used by the desktop.

- then I have a message "no carrier detected on interface em1"

- followed by " IPv6 ADDRCONF(NETDEV_CHANGED): em1: link become ready
(and of course the led goes back to green on the switch)

But I have no IPV6 network setup!

How can I force to IPV4 setup to load the kikstart file ?

I've tried do switch from legacy boot to UEFI boot (my local server
setup can answer requests for the two options), update the BIOS of the
desktop...


Any help is welcome


Patrick


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