NAS drobo RAID Rebuild Failure.
One of our customers faithful Drobo NAS system indicated that it was running out of storage capacity. The Drobo was configured as a four disk drive RAID 5 array. So what to do? The customer replaced one of the existing 1TB hard disk drives with a brand spanking new 2TB hard disk drive. The DROBO then started the process of rebuilding with an estimate time to complete of over 40 hours. A fair number of hours into the rebuild one of the old and overworked 1TB hard disk drives also failed which meant the customers data, mainly an extensive library of iTunes music and movie downloads, was rendered inaccessible. Foolishly the customer had not backed up the Drobo (backing up a back-up) for over two years due to the fact that this would take an eon to perform.
NAS data recovery
Datlabs data recovery services were called and the clients data was retrieved successfully at a reasonable cost. But how could this potential NAS data loss situation be prevented?
NAS Recovery and Back-up
The Drobo NAS product range shows that with Drobo S, DroboPro or DroboElite you can enable Dual Disk Redundancy whereby losing two drives simultaneously the Drobo will recover. Good to know !
For those with older systems; Make sure you backup to say Time Capsule or to an off-site server and clone drives to external hard disks regularly and this before you do any maintenance or upgrade work.