My G-Drive 2TB USB3 with Firewire backup is less than 1 year old0G02529 I use this for time machine backups on my Mac Pro Server (Mid 2010)This is one of two similar drives in rotation OS X El Captan 10.11.4 The drive has been giving me trouble for months. After consulting with a G-Technologies agent, I was encouraged to update the firmware on this external drive. But it failed on the subsequent attempt (one hour later)I cannot eject the G-Drive because one or more application is using it. Process failed with this error message:“Updating boot support partitions for the volume as required. Seems everyone is investing so much into sales and they lack support. I decided to re-format the drive and do a new, clean backup. I downloaded G-Technology_Firmware_Update_Utility0614Installed and ran this on our Mac Pro with only the problematic G-Drive connected. I have been extremely satisfied with the attention given by this forum as well as the tech support.
From what your experiencing with the drive and you're still getting the type of corrupted errors you're getting then we would suggest getting the drive replaced under warranty.
There are many step-by-step guides on the internet that explain how to add an SSD to an existing Mac, and create a 'Fusion Drive' that has the speed of an SSD, but also the capacity of a Hard Drive.
All these guides fall short in one way that was important to me.
Creating the Fusion Drive the way these walkthroughs say (including OWC's exceptional guides), destroys the Recovery Partition that exists on the drive.
Without a Recovery Partition, you cannot enable File Vault2, and will need some other external boot drive if you ever need to perform maintenance on your internal drives.
For a laptop computer that might be far from home, not having a Recovery Partition was unacceptable to me.Also note that if you buy a Mac from Apple today with Fusion Drive, it DOES come with a Recovery Partition, so it is indeed possible to do.It turns out that Apple's Core Storage technology is more flexible than these walkthroughs give on.You can enroll an individual partition of a drive in a Fusion Drive, instead of the whole drive.This means that you can join just a specific data partition of your HD with an SSD, and leave the Recovery Partition intact.I like to eject my external drives because they slow down my mac when they spin up, but I want to have an easy way to access them if I need to.