CentOS 5.4: installing new kernel 2.6.32.9 guide

[funky_dennis]

Recently I've spent a few days in fight with the following new kernel panics:

insmod: error inserting '/lib/dm-region-hash.ko': -1 File exists
mount: could not find filesystem '/dev/root'

After some googling I didn't find any useful fixes, so I started to dig deeper and figured that default built initrd image does't include LVM utility. Here

Comments

[nodoubts]

под кат! )

[funky_dennis]

угу, забыл

Works

[anonymous]

Been searching the web for this issue the past couple of days with no luck until i found your post. Thank you!

Re: Works

[funky_dennis]

Glad it worked for you.

I'm crazy

[anonymous]

Thank you!
First error fixed.

But...
My message is ....

(echo Scanning logical volumes
lvm vgscan --ignorelockingfailure
echo Activating logical volumes
lvm vgchange -ay --ignorelockingfailure contents) <-- append line
resume LABEL=SWAP-sda5
echo Creating root device.
mkrootdev -t ext3 -o defaults,ro sda1

I don't know

Do you know what is mean?

If you know it, I wait for your reply.
Please!

Re: I'm crazy

[funky_dennis]

Show your grub.conf:

# cat /boot/grub/grub.conf

and the output

# vgscan -vv

Re: I'm crazy

[anonymous]

# grub.conf generated by anaconda
#
# Note that you do not have to retun grub after making change ~~
# NOTICE: You do not have a /boot partition. This means that
# all kernel and initrd paths are relative to /, eg.
# root (hd0,0)
# kernel /boot/vmlinuz-version ro root=/dev/sda1
# initrd /boot/initrd-version.img
#boot=/dev/sda
default=1
timeout=5
splashimage=(hd0,0) /boot/grub/splash.xpm.gz
hddenmenu
title CentOS(2.6.33)
root (hd0,0)
kernel /boot/vmlinuz-2.6.33 ro root=LABEL=/ rhgb quiet
initrd /boot/initrd-2.6.33.img
title CentOS(2.6.18-164.EL5)
root (hd0, 0)
kernel /boot/vmlinuz-2.6.18-164.el5 ro root=LABEL=/ rhgb quiet
initrd /boot/initrd-2.6.18-164.el5.img

Re: I'm crazy

[funky_dennis]

Ok, try

-mkrootdev -t ext3 -o defaults,ro sda1
+mkrootdev -t ext3 -o defaults,ro /dev/sda1

in init script

Could not find filesystem /dev/root.

[ext_226684]

I found your post because I too was getting the "Loading dm-region-hash.ko module" error.

I am using LVM, but am not sure if this is the problem after following your guide I still get

"Could not find filesystem /dev/root".

I have no clue how to proceed and I need to install a kernel > 2.6.21 ( I am trying 2.6.33 ) onto CentOS 5.4 for support for hardware sensors.

I understand this is not the topic of this post but I would appreciate any advice you could provide in trouble shooting this.

Re: Could not find filesystem /dev/root.

[ext_226684]

Apologies, I have seen your update

UPD: you might need to set CONFIG_SYS_DEPRECATED_V2=y in kernel config

This has indeed fixed my problem.

Thanks funky_dennis.

Re: Could not find filesystem /dev/root.

[funky_dennis]

Glad it works!

Re: Could not find filesystem /dev/root.

[ext_226684]

Hi,

Running into this problem and I have:

# grep 'CONFIG_SYSFS_DEPRECATED_V2' /usr/src/linux-2.6.33.2/.config
CONFIG_SYSFS_DEPRECATED_V2=y

But it still gives me that error. Is it supposed to be CONFIG_SYSFS_DEPRECATED_V2 or CONFIG_SYS_DEPRECATED_V2?

[anonymous]

Hi! Funky_Dennis
Thanks your detail message. Recently, I upgrade my kernel to the newest version and met the same issue. When my os was on booting, I saw the same error. But now, I already fix it and refer your documents.
By Anderson.Chen in Taiwan

[funky_dennis]

Glad it works!