If it is a 2-disk (3.5") 1950:  2x2TB = 4TB total disk storage; RAID 0 = 4TB usable, RAID 1 = 2TB usable. If it is a 4-disk (2.5") 1950:  4x1TB = 4TB total disk storage; RAID 0 = 4TB usable, RAID 10 = 2TB usable, RAID 5 = 3TB usable, 2xRAID 1 = 2x1TB usable. I guarantee he is referring to the total disk space of all disks included with the machine in the sale. A single disk (not total of all disks in RAID array) cannot be larger than 2TB on any of the supported controllers for a 1950 (SAS 5/6, PERC 5/6).  
Hi Guys, I am planning on doing an upgrade on one of our PowerEdge 1950's which has the SAS 5/i controller.  Currently it as 1 x 80GB SATA II Drive and 1 x 250GB SATA II Drive.  The upgrade I am wishing to do is replacing the 250GB SATA II Drive with a 2TB SATA II Drive so we can merge our outdated data cluster (Intel Celeron D 3.06GHz) and our not-much used 1950 together to save power and room on our rack whilst making data much faster to access. Because the Cluster comprises of 1 x 1TB Drive and 1 x 500Gb Drive, it would be impractical to simply pop the drives into the 1950 as both drives are nearing their capacity. They are also getting on a bit now with the 1TB Drive having a warning Reallocated Sector Count in SMART (We received it as a Manufactures refurbished replacement for a brand new failed 1TB drive back in Dec. 09).  The questions I wish to ask are: What is the maximum capacity hard drive the SAS 5/i controller can accept and: What is the total combined hard drive capacity? Obviously this is with the latest firmware for the controller (Hence the reason I'm asking in a new thread).  Thanks for your answers, Chris
PowerEdge 1950 SAS 5/i Maximum Hard Drive Capacity?