About me

I live in Madrid, Spain, with my wife, our boy and Buffy, our pretty lady poodle. I work as Senior Consultant for VMware PSO, mostly focused on NSX, vCloud Director and OpenStack. I’ve been lucky enough to be awarded as vExpert from 2011 to 2015. I’m interested in everything related to Unix, virutalization, VMware, Cloud, Python, and system administration.


24 responses to About me


    VirtualBox -noraw0 -vm vmname fails, what version of VirtualBox were you using? I dont even see those options available. I’m using VirtualBox 3.1.4.

    VirtualBox –help
    Sun VirtualBox Graphical User Interface 3.1.4
    (C) 2005-2010 Sun Microsystems, Inc.
    All rights reserved.

    –startvm start a VM by specifying its UUID or name
    –rmode sdl|image select different render mode (default is sdl)
    –dbg enable the GUI debug menu
    –debug like –dbg and show debug windows at VM startup
    –debug-command-line like –dbg and show command line window at VM startup
    –debug-statistics like –dbg and show statistics window at VM startup
    –no-debug disable the GUI debug menu and debug windows
    –start-paused start the VM in the paused state
    –start-running start the VM running (for overriding –debug*)

    The following environment variables are evaluated:
    VBOX_GUI_DBG_ENABLED enable the GUI debug menu if set
    VBOX_GUI_DBG_AUTO_SHOW show debug windows at VM startup
    VBOX_GUI_NO_DEBUGGER disable the GUI debug menu and debug windows


      Hi Rick. Somehow I mistyped the options, is -norawr0 instead of -noraw0 and with -startvm , the options of the example are for VBoxSDL. The virtual machine can be started either with VirtualBox or VBoxSDL from the command line. I updated the post to show both options, thanks for your comment.



    I have currently added FOM to my management group and it has been sitting for about 1 hour with message “Waiting for 1 manager to join”.
    How long did it take for FOM to join the management group?

    Thank you and muchas gracias,



      Hi Luis, thanks for commenting :-)

      Adding the FOM to the cluster should take no more than a few minutes, sometimes even less. So maybe there is something wrong with your FOM or the cluster configuration itself.



      Hello Luis,

      I have got exactly the same problem with two HP P4500G2 and a FOM.

      Do you have a solution for me?

      Many thanks.



    Hi Juanma,
    I want to configure c7000 with 8 HP Proliant BL 685 g7 server using virtual connect , My ESX will have storage from NFS , virtual connect is new for me. Could you please guide me to configure networking for same, I will be using esx 4.1 installable .


    Hola juan manuel, tu blog es sin duda muy interesante, dejo de un lado las formalidades ,hace unas horas lei tu post sobre problemas con vmware NUMA y equipos blade HP y de como resolviste eso por medio de una modificacion del kernel de wmware por medio de vSphere

    Tengo un “error” casi parecido sin embargo creo que se trata de una variacion
    es la siguiente pantalla

    juan manuel te agradeceria cualquier comentario respecto a esto
    Gracias y Saludos!


      Hola Francisco. Muchas gracias por el comentario

      En realidad el post del que hablas no tiene nada que ver con Blades HP, sino que es un error que se da en los ESX y ESXi 4.0 cuando estan instalados en una máquina virtual.

      En cuanto al problema que comentas y que aparece en el screenshot, ese error se da cuando la memoria no se encuentra balanceada adecuadamente entre los procesadores del servidor. En las arquitecturas NUMA la memoria debe distribuirse de manera simétrica entre los diferentes procesadores del servidor. En el siguiente KB de VMware se explica esta problemática:


      Si necesitas algo de ayuda a la hora de rebalancear la memoria de ese BL465G7 puedes utilizar la HP ProLiant DDR3 Memory Configuration Tool en la siguiente URL:


      Espero haberte servido de ayuda, Si tienes alguna otra cuestión no dudes en escribir un comentario.



    Can you ping me … I am working w/ HP-UX and have some questions re: boot time behaviors; I keep hitting your blog from Google Searches and you seem to have a very good breadth of knowledge in this field.



    Hola Juan,

    Sabes si existen documentos officiales que indiquent que la gen8 soporta VSphere5



    Dear Juan
    All the Documents/Blog are awsome and i am a big fan of you. if you dont mind i would like to get your mail ID for any urgent contacts or doubt.
    I didnt tel my self — AM working as a HPUX/Linux consulatnt in one company in India…
    Keep in touch…


    Hola Juan Manuel:

    Excelente BLOG
    He aprendido algo mas acerca de la configuración del vca gracias a ti
    vivo en Barcelona y viajo mucho a Madrid
    Soy instructor certificado en VMware y estoy preparándome para ser VCAP
    Muchas gracias por tus aportes



      Hola Alberto. Me alegro que te guste el blog que te haya sido de ayuda, ese era el objetivo :)

      Dame un toque por Twitter la próxima vez que vengas por Madrid. Espero estar en Barcelona para el VMworld, aún no me lo han confirmado, asi que a ver si nos tomamos algo alli.

      Un saludo!



    I’ve managed to install CMC 9.5 on Windows Server 2012 BUT %) FOM won’t launch now, the kernel is freaking out sadly.

    Have you managed to install it somehow although I know HP has stated that Win2k12 won’t be in support till SAN iQ v10.

    Thanks in advance,


    Hello, just now discovered your blog while beginning to investigate new HP StorVirtual VSA, curious your option how new VMware VSA compares to HP VSA?? Equally good?? Worse?? What?? Thank you, Tom


    Excelente documentacion sobre EMC symetrix y time finder! es raro ver blogs y posts de EMC, alguna otra sugerencia o documentacion que sugiieras para la buena administracion de Symetrix? tienes twitter o fb? saludos desde Mexico


    Hi Juan

    I came across your blog today and wondered if you would be interested in our blog/video blog competition below…

    10ZiG are offering a great prize of a year’s FREE Microsoft 2012 Server, hosted in Node4’s Data Centre for the best blog, or video blog demonstrating why you would use 10ZiG’s WE8 5818v with Microsoft 2012 Server.

    We are giving away 30 day demo devices for both the Thin Client and the server to all bloggers who want to enter.

    If you are interested then please email me … tomd@10zig.eu


    Remarkable things here. I’m very satisfied to peer your post. Thank you a lot and I am having a look forward to contact you. Will you please drop me a e-mail?


    Ce est à des fins éducatives seulement , il ne faut
    pas m’en vouloir si vous obtenez en difficulté : D . Avant de procéder à l’installation de Linux
    sur votre PS3, vous devrez configurer la console avec une série d’outils qui
    ont été développés pour l’installation et la mise en place d’ autres – OS +
    + . Dans l’énergie actuelle, Essense presque tout le monde
    aimerait vous offrir un gratuitement PSN codes informatique
    , les nouvelles fantastiques rapports id il ya beaucoup
    de façons le cas engendrer gratuit des limitations
    PSN de charge, deux est envoyé par courriel à vous par la loi , en plus de la volonté
    de ne pas envisager un long temps libre avant , vous aurez de cet ouvrage très bien comme autre stratégie est le résultat de l’aide de son mode d’alimentation PSN générateur la meilleure idée alors que la méthode la
    plus rapide pour obtenir le code gratuit .


    Hi Juan

    My name is Julia, I’m an online advertising specialist for EMEA (Veeam Software)

    Could you please tell me your e-mail because I can’t find it.

    My e-mail



    HI , this is kumar , i am working in hp (india ) as hp unix admin. i have studied your docs , very nice and usefull . need configuration of SGeSAP configurtion for SG 11.20 , can you help me . i have studied still not understand sap integartion with service guard


    Actually when someone doesn’t know afterward its up to other visitors that
    they will help, so here it happens.


    I like your motto, “An old school Unix Geek in the era of Virtualization”. Same as me. The world keeps changing, until we are coming to this era of Cloud and Virtualization. I was working in project management field for the last 10 years, almost forgot the day I modified kernel. Now, I am joining one cloud project as architect. Pretty tough for me. Your “about me” is somehow energized me. You were an old school unix geek, but now you are still catching up with the latest technology world.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s