External HDD and Internal HDD

Is it possible to plug in both internal and external hard disks at the same time and run them at the same time, also is it possible for both of them to have two different OS, like one has XP the other has Windows 7.
4 answers Last reply Best Answer
More about external internal
  1. you can connect any number of internal & external hard drives as long as your bios support & available connectors..

    but you cant run more than one OS normally, for that you have to go any of virtualization products like
    virtual pc or virtual box, or vmware..

    virtual pc & vitrual box is free & limited features..
    if you need more option go for VMWARE , which give vmware server for free(needs free registration)
    or vmware workstation which is commercial product..
  2. What you can do is have one OS on each HD and choose which one to boot from in the BIOS each time you boot. To accomplish this, have only one HD installed at a time when you load the OS's.
  3. Best answer

    It is possible but not advisable to have both an internal and external bootable hard drive installed. If you wish to run both Windows XP and Windows 7 have you considered using XP Mode? To learn more about XP Mode, please see the following link:

    Microsoft Windows Client Team
  4. Best answer selected by Rahul Babaria.
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