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@scotthouston_ we recommend using a supported Apple OS like Mavericks or Yosemite that still support software RAID via Disk Utility
@scotthouston_ The G-Raid w/TB Gen1 was designed around Apples software RAID feature, the drive is not supported under OS El Capitan
@ModernArtPics glad to hear you got the issue resolved, contact us again if you have further questions. have a great day
@PatBravo4 The XL units are hardware raid, you will need a G-Speed eS or eS Pro in order to raid two units together https://t.co/mw86gkKe2K

G-SPEED Q - RAID Configurator

Using the G-Technology configurator, you can change the RAID settings to either RAID 0 (Stripe) or RAID 5 (Redundant Stripe). The RAID 0 setting will allow for an increased performance across both drives and display the maximum capacity available. The RAID 5 configuration allows you to write partial data across all drives. For example in a G-SPEED Q with 1TB (x4) drives, the end capacity would be 3TB of storage. The "missing" 1TB of space in this example is used to hold partial amounts of data in the event any 1 drive in the RAID fails.

Mac OS X 10.6 and higher
Operating Systems

Win XP, Vista, win 7 & Win 8
32-bit Operating Systems

Win XP, Vista and 7
64-bit Operating Systems