Drobo (2nd gen) to Drobo (3rd gen), part 4

See also: Part 1, Part 2 and Part 3.

When we last left off, we were waiting 440 HOURS (18 days!!!) for my second generation Drobo to rebuild after replacing a 2TB drive with a 3TB one. 440 HOURS! Fortunately, it didn’t actually take that long. I did the drive swap on a Friday evening, and it was actually complete the following Wednesday evening – a mere 120 hours later.

During those five days, if a second drive had failed, my data would have been toast. When a drive is down and being rebuilt, there is no data protection. I would be writing a completely different article is that had happened.

Faster than a Speeding Rebuild…

Spoiler: Drobo 3rd gen rebuilt in 12 hours what 2nd gen took 120 hours to do. (* Not 100% fair since I was moving a second 3TB drive in, but it's good enough for a reference point.)

Spoiler: Drobo 3rd gen rebuilt in 12 hours what 2nd gen took 120 hours to do. (* Not 100% fair since I was moving a second 3TB drive in, but it’s good enough for a reference point.)

One of the promises of the new 3rd generation Drobo was that it has dramatically faster rebuild times. (Skipping ahead, it looks like the newer model could have done the same rebuild in 12 hours.) On the downside, the new model does not have Firewire, so disk access would be much slower on my old Mac which only has USB 2.0. Newer Macs have USB 3.0, which is supposed to be very fast with the 3rd gen Drobo.

Since I didn’t want to spend months waiting for Drobo to rebuild as I upgraded drives one at a time, and since I feared trusting my data to a six year old end-of-life Drobo and dying hard drives, I decided it was time to upgrade. I do need to point out that I did not go out and buy a new $300 Drobo. I am far too broke for that. But, I do have one to review. If you want to get your own, you can use a special discount code and get $100 off. Go to:


You can learn more about Drobo there, and find a special “KEN100” discount code that lets you pick up a 3rd generation Drobo for $199 (plus about $20 in FedEx shipping). That would be a good price for a dumb 4-bay hard drive enclosure. (This code is supposed to be good until 12/31/2015.)

I’ll wait right here while you go do that . . .

Old Versus New

Drobo 3rd gen (left) vs 2nd gen (right).

Drobo 3rd gen (left) vs 2nd gen (right).

One week later… You should now have your new Drobo. The first thing you will notice is their package has gotten much nicer. I blame this on Apple, as they have made boring brown boxes seem downright primitive.

My old Drobo came wrapped in a black cloth bag. The new one comes in a black cloth bag that has handles on it — it’s a Drobo-logo’d version of those reusable grocery store bags! There was also a Drobo window sticker inside just like when you get that Apple sticker with a new Apple product (did I mention blaming things on Apple?). The packaging has much improved.

Everything else should be pretty similar. There is an included USB cable, and the power supply now uses a more standard power cable. The new Drobo looks the same except the logo is now embossed/raised on the front instead of just being painted on. (That’s the easiest way to tell them apart by looking at them when the lights aren’t on. More on the lights in a moment.) There is also a power switch on that back now. (Wow! I can FINALLY turn the thing off without having to yank the power cable.)

There is a warning note attached to the Drobo (and repeated in the included Quick Start guide printed on the inside cover of the accessory box). It says any drives you insert will have their data erased. What!?! I thought I read you could migrate your old “disk pack” from an old Drobo to the new one. Just to be safe, I did some searching on Drobos website and found an article that verified this was possible.

I also contacted Drobo support and they clarified: As long as the units are powered off, the erase will not happen, but if you insert the drives while the Drobo is booted, it will being the process of formatting them for new storage.

PRO-TIP: READ THE INSTRUCTIONS AND WARNINGS! Had I made the mistake of having my new Drobo powered up when I inserted the first drive, I would have lost data!

Once my previous drives (three 2TB and one 3TB) were moved over to the new Drobo, I powered it up to see if my data would survive…

Next time, we’ll find out if my data survived…


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