5 Replies Latest reply on Jul 4, 2012 8:24 AM by maishsk

    Installing ESXi 5 on a usb flash drive

    peter79 Enthusiast

      Guys,

       

      What is the minimum space required when installing ESXi 5 on a usb flash drive?

       

      Regards.

        • 1. Re: Installing ESXi 5 on a usb flash drive
          schepp Virtuoso
          User ModeratorsvExpert

          Hi,

           

          I stumbled over this once, since it doesn't seem to be documented anywhere in the official documents, not in the Knowledge base and not in the vSphere 5 Guides.

           

          But if you run the installation it asks you to "select a disk that has a capacity greater than 910 MiB".

           

          So that would be the answer I guess

           

          Regards

          • 2. Re: Installing ESXi 5 on a usb flash drive
            peter79 Enthusiast

            That would make sense all right .  I have found some people in other forums saying they were running ESXi from 1 GB keys.

            • 3. Re: Installing ESXi 5 on a usb flash drive
              mouradb Hot Shot

              I've done mine on a 1 GB  USB stick and working fine!

              • 4. Re: Installing ESXi 5 on a usb flash drive
                Chris Wahl Master

                I'd recommend at least a USB 2.0 device to avoid long boot times, or USB 3.0 if you can find it.

                VCDX #104 (DCV, NV) ஃ WahlNetwork.com ஃ @ChrisWahl ஃ Author, Networking for VMware Administrators
                • 5. Re: Installing ESXi 5 on a usb flash drive
                  maishsk Expert

                  1GB

                   

                  From the Documentation

                   

                   

                  Storage Requirements for ESXi 5.0 Installation
                  Installing  ESXi 5.0 requires a boot device that is a minimum of 1GB in size. 
                  When  booting from a local disk or SAN/iSCSI LUN, a 5.2GB disk is required to 
                  allow for the creation of the VMFS volume and a 4GB scratch partition on the 
                  boot device.  If a smaller disk or LUN is used, the installer will attempt to 
                  allocate a scratch region on a separate local disk.  If a local disk cannot be 
                  found the scratch partition, scratch, will be located on the ESXi host ramdisk, 
                  linked to /tmp/scratch.  You can reconfigure scratch to use a separate disk 
                  or LUN.  For best performance and memory optimization, VMware recommends that 
                  you do not leave scratch on the ESXi host ramdisk.
                  
                  To reconfigure /scratch, see Set the Scratch Partition from the vSphere Client.
                  
                  Due to the I/O sensitivity of USB and SD devices the installer does not create a 
                  scratch partition on these devices. As such, there is no tangible benefit to using 
                  large USB/SD devices as ESXi uses only the first 1GB. When installing on USB 
                  or SD devices, the installer attempts to allocate a scratch region on an available 
                  local disk or  datastore.  If no local disk or datastore is found, /scratch is 
                  placed on the ramdisk.  You should reconfigure /scratch to use a persistent 
                  datastore following the installation.
                  

                   

                   

                  Maish

                  VMTN Moderator | vExpert

                  Author of VMware vSphere Design

                  @maishsk | My Blog