May 18, 2018

How to install SCST 3.4.0 in Ubuntu 18.04

Well crap. The other day I talked about how I re-configured one of my Bauer-Power iSCSI SANs using tgt. It was an easy setup, but once I started using it I noticed that tgt performed like shit. CPU's were spiking like crazy on the SAN itself, and when I was backing stuff up I couldn't access the drive on the backup server. It would get completely unresponsive!

I decided I had to go back to SCST. Luckily installing it is way easier than it used to be. To install version 3.4.0 now just do the following:
  • Create an empty working directory
 rm -rf ~/scst-build  
 mkdir ~/scst-build  
 cd ~/scst-build  
  • Install dependencies
 sudo apt install git devscripts equivs dkms 
 git clone -b ubuntu-3.4.x https://github.com/ubuntu-pkg/scst.git  
 cd scst  
 sudo mk-build-deps -i -r  
  • Build the package
 dpkg-buildpackage -b -uc  
  • Pre-install, create two directories (For some reason the deb packages don't do it...)
 sudo mkdir -p /var/lib/scst/pr  
 sudo mkdir -p /var/lib/scst/vdev_mode_pages  
  • Install
 sudo dpkg -i ../scst-dkms_*deb  
 sudo dpkg -i ../iscsi-scst_*.deb  
 sudo dpkg -i ../scstadmin_*deb  

Now you just have to configure your LUN using the instructions in my tgt post, and configure your /etc/scst.conf file using my old SCST post. Once those are done restart the scst service.

 sudo service scst restart  

Of course, if you don't want to mess with all of the above stuff, you could just download my pre-packaged scst 3.4.0 deb files for Ubuntu 18.04 and run my install script...

 cd ~  
 wget https://mail.bauer-power.net/drop/scst/scst-3.4.0-Ubuntu.tgz  
 tar -xzvf scst-3.4.0-Ubuntu.tgz  
 cd scst*  
 sudo chmod +x install.sh  
 sudo ./install.sh  

Boom! Now just setup your LUN and your /etc/scst.conf file and you're off to the races!



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