You can place the scratch partition on any available datastore (NFS, FC, iSCSI, local). When manually configuring the scratch partition where should I put it? If this happens it’s a good idea to manually reconfigure the scratch partition after the install.Ĥ.
If no local vfat partition or VMFS volume is found, as a last resort the installer will put the scratch partition in “/tmp/scratch” (i.e.
Instead, the installer first scans for a local 4GB vfat partition, if it doesn’t find one it will then scan for a local VMFS volume on which to create a scratch directory. Where does the scratch partition get placed when booting from USB?īecause USB/SD devices are sensitive to high amounts of I/O the installer will not place the scratch partition on a USB/SD device.
CREATE ESXI USB BOOT DISK INSTALL
Based on how often you reboot the host and install patches it is expected that a good quality USB should last for several years.ģ. The only reoccurring I/O is when the host configuration is routinely saved to the USB/SD device, which by default is done once every 10 minutes. When booting from USB/SD keep in mind that once ESXi is loaded, it runs from memory and there is very little ongoing I/O to the boot device. This naturally raises a concern about the life span of the USB/SD device. Unlike a local disk or SAN LUN, USB/SD devices are sensitive to excessive amounts of I/O as they tend to wear over time. Be sure to use good quality USB/SD devices. When choosing a USB/SD boot device, it’s not the size of the device that is important but the reliability of the device. When booting USB/SD there is little benefit to using a larger device because any space beyond the 1 st GB will go unused. The minimum disk size required to install ESXi is 1GB. Below are some answers to several of the more popular USB/SD related questions.
Unfortunately, the vSphere docs largely assume you will use a local disk and don't really cover USB/SD, as such it’s not always easy to find answers to common questions. At VMworld I was surprised at the number of questions I was asked related to booting ESXi off of USB/SD.
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