Red Alert. Drobo is critically low on capacity

Forum History General Discussion
1

Hi Guys,

We have a drobo B1200i. It’s critically low on capacity. It’s currently set up with 9 3TB drives, but reaching maximum capacity. Can we replace the critical 3TB drive with another drive (4TB) to increase capacity? Would that affect the current RAID setup?

2

If the Drobo is in a stable state and the data accessible it is okay to replace a drive.

Keep in mind that the largest size drive is used for redundancy

http://www.drobo.com/storage-products/capacity-calculator/
http://myproducts.drobo.com/article/AA-01397

3

I assume that your B1200i is setup as follow:

9x 3TB HDD, and 3x SDD (Data Tiering)

  1. If you B1200i is set to SDR (Single Disk Redundancy) - You will need to swap in at least 2x 4TB drives to effectively increase the total disk space.

  2. If you B1200i is set to DDR (Dual Disk Redundancy) - You will need to swap in at least 3x 4TB drives to effectively increase the total disk space.

http://www.drobo.com/storage-products/ca...alculator/

4

Only ever replace one drive at a time and wait for the rebuild to complete before replacing the next. Be prepared to wait several days for each stage to complete.

5

hi, its usualy about 1 day per TB of data to rebuild on 4-5slot drobos, though your model might be a bit quicker (depending on how many users are using it at the time) but please feel free to keep us updated with how it goes.