Substitute the failing Seagate Series ST3000DM001

I love my two Promise Pegasus R4 Thunderbolt Storage Shelters. Some months ago I upgraded the Backup Storage to 3TB drives, Seagate’s ST3000DM001. Unfortunately, as Backblaze reveals, this series is very buggy and not at all recommendable. So, whenever one of the drives had failed, I would substitute it with a Seagate ST4000DM000 drive, which is a 4TB model. Backblaze shows, that this model is quite ok when it comes to error statistics. What I always thought was, that Promise Pegasus R series would only support the drive models which can be found in the Pegasus Promise compatibility listing. But No! What drives can be used with Promise Pegasus R4, R6 or R8?

Then today, when another of Seagate’s 3TB drives failed, I looked for a substitute and came across the Seagate ST4000VN000 – which is listed as proper NAS drive. I was courageous and bought one from Cyberport and hoped it would fit and work in my Pegasus Promise R4. As you can see here:

Screen Shot 2016-08-06 at 21.52.55

The RAID is being rebuilt ...
The RAID is being rebuilt …

Thus I can say with confidence:

The Seagate NAS drive ST4000VN000-1H41, which is a typical SATA drive with 4TB capacity, runs well in the Promise Pegasus R series, even though it is not listed in the compatibility list. And I am still running on firmware release 5.04.0000.36. The benefit of this slightly more expensive hard disk is a 3 year warranty (within Germany) and – as Seagate claims – some extra routines to make it work 7×24.