Disk verification under RAID 1


#1

Just purchased a G-Raid with Thunderbolt and have configured it RAID level 1. Is there a way I can verify the RAID is performing as expected? Is there a visual indicator somewhere that alerts me if one of the two drives is failing? Thanks.


#2

The fact that it mounts and shows half the capacity is proof it is working. If a drive fails then you will get a red light on the front of the unit. If you open the door one of the drives will have a red light denoting which one as failed. The configurator used for creating RAID1 is also where you do rebuilds or check health.


#3

Thank you!


#4

I want to understand the problem and Rydia’s reply here. My 8TB Thunderbolt G-Raid drive, formatted 01, used to show both 4TB disks on my iMac desktop and in the Mac disk utility and elsewhere. Recently, only one disk shows everywhere and I can’t tell which one. There are no red lights. I just want to be sure a second drive is actually duplicating the first one. In the Configurator it says “Protected - RAID 1, Capacity 4 TB, Online, and then Disks: 1, 2”. But I don’t understand why the disk image that once appeared on my desktop, in the disk utility, and in the System report doesn’t show up now? Is this possibly a Mac system upgrade to Mojave 10.14.1? My finder is set to show all disks. Really, I’m just looking assurance that I actually have a backup.


#5

If you are in RAID 1 you should only see one drive and it will appear as 4TB. Raid 0 will show 2 drives, each 4 TB.

If you open the front panel of your raid unit you should see both drive lights on when copying to the drive.


#6

Thanks Curtis. I may have been remembering the two drives from when I first turned it on, before setting it to RAID 1.