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Old 10-09-2010, 03:09 PM   #1
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CentOS 5.3 x86_64 + Software RAID (mdadm) - Safe to yum update ?

Dear forum,
This is probably my first post here.

Recently I have got a dedicated CentOS 5 x86_64 server running RAID 1 500 GB using mdadm.

Here is my /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdb1[1] sda1[0]
      56128 blocks [2/2] [UU]

md1 : active raid1 sdb3[1] sda3[0]
      487275456 blocks [2/2] [UU]

unused devices: <none>
Here is my grub.conf
# grub.conf generated by anaconda
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/hda3
#          initrd /initrd-version.img
serial --unit=0 --speed=57600
terminal serial

title CentOS 5 (Disk 1)
        root (hd0,0)
        kernel /vmlinuz ro root=LABEL=/ console=tty0 console=ttyS0,57600
        initrd /initrd
title CentOS 5 (Disk 2)
        root (hd1,0)
        kernel /vmlinuz ro root=LABEL=/ console=tty0 console=ttyS0,57600
        initrd /initrd
Here is my mount output as well
/dev/md1 on / type ext3 (rw)
none on /proc type proc (rw)
none on /sys type sysfs (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/md0 on /boot type ext2 (rw)
none on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
I noticed it from /etc/redhat-release it is CentOS 5.3 final.

I have been thinking about updating it to CentOS 5.5 via yum update, but part of the new packages are a new kernel and a new grub and this makes me unsure since it will be big hassle to reimage if this fails.

Is it safe to perform this update ? Are there any known problems I should look out for ?

Any experience or advice appreciated :-).

Last edited by n7Epsilon; 10-09-2010 at 03:12 PM.
Old 10-09-2010, 04:01 PM   #2
John VV
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should be fine to upgrade to 5.5
BUT as ALWAYS back-up, BACK-UP your data first .
There are never any 100% guarantees

you might have a few problems with config files skipping a version 5.3 to 5.5


centos5, mdadm, raid, safe, upgrade

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