Saturday, June 27, 2009

Wednesday, June 3, 2009

Mounting 13TB Raid

This is some quick info I learned while trying to mount a 13TB partition in RHEL 5.3. The main thing is that fdisk does not like to make partitions larger than 2.2TB because dos labels are not recognized. The second is that ext3 file system doesn't like anything bigger than 8Tb. So here is what I did to go around it. I had to used parted instead of fdisk to overcome that 2TB limit.

#parted /dev/sdd
#mklabel gpt
>mkpart primary 0 13000G
#yum install e4fsprogs
#mkfs.ext4 /dev/sdd1

To lay this all out I had to rename the label of the partition to gpt so I could use the larger partitionsize and then I installed support for ext4 and used that as the filesystem. Yes I know I punked out a bit but I am sick of trying to find work arounds for ext3.


You can't mount ext4 in RHEL just yet lol kind of important. I went back and did

#mkfs.ext3 -F /dev/sdd1

and it took the filesystem

Monday, May 25, 2009

Setting IP addresses through terminal (RHEL)

For some reason this is something that will just not stick in my head and I always have to go searching for it. The way you permanently set/change the ethx ip address is to edit the following file:

nano /etc/sysconfig/network-scripts/ifcfg-ethx

In this file you can set the ip address, gateway, netmask and ipv6 stuff.

To change the DNS addresses you must edit the following different file:

nano /etc/resolv.conf

Once you have made the changes you need to restart the network service to use the changes

service network restart

!!Remember all these commands need to be done as either root or through sudo!!

Friday, March 27, 2009

Sad news for Ubuntu on SunBlade 100's with Condor Users

I had about 20 Sunblade 100 units sitting around the lab and decided with my team to make a static cluster using them. Well the install of Ubuntu went pretty well using Server 8.10 and Server 7.10. Even loaded the Ubuntu-Gnome desktop on a couple of them just to see it. So with all going well I tryied to load the ever complicated Condor Project to tie them together. Well after trying multiple versions, based on debian, rehl, sparc, and eventually even compiling from source code I can say that Condor on a Sun with Ubuntu using the SPARC processor just will not work. Sorry guys.

We ended up loading Solaris 10 and loading Condor. If anybody does find a way please feel free to leave a comment but I doubt it happening any time soon.