↝ OWC / MacSales.com... ↜
↝ diglloyd Deal Finder... ↜
Buy other stuff at Amazon.com...
Up to 65% better pricing than Apple
Lloyd recommends 32GB RDIMM modules for most users (more expensive LRDIMMS are for 512GB or more).
CalDigit T3: 3-HDD RAID-5 (Striping with Parity)
Related: hard drive, RAID, RAID-0, RAID-4, RAID-5, SoftRAID, storage, Thunderbolt
A RAID-5 uses one drive of N for parity information. It can be thought of as a RAID-0 stripe with one parity drive (“striping with parity”), for fault tolerance. Should one drive fail, the RAID degrades to a RAID-0 stripe.
The best speed that can be expected of an N-drive RAID-5 is the speed of an (N-1) RAID-0 stripe, because the parity drive must also be written to. However, even hardware RAID-5 might struggle with that goal; there is some overhead.
Tested with three fast Toshiba 7200 rpm DT01ACA200 series drives. Single-drive speed of the drives used is ~180MB/sec on the fast portion of the drives (left side of graph).
The SoftRAID 5 driver delivers performance right at the best possible speed of around 360MB/sec — impressive. The falloff over the remaining capacity is an unavoidable function of hard drive speed across the capacity (it would not occur with SSDs).
Or iMac 5K or iMac Pro?
Consult with Lloyd ASAP before buying!
System configuration for CPU, GPU, memory, SSD, backup, RAID, optimizing performance, workflow.
For YOUR optimal workflow
Avoid costly mistakes in throwing money at the problem for less performance and/or buying the wrong machine for your own needs!
Remote screen sharing available for RAID, software configuration, etc.
More about 2019 Mac Pro vs iMac 5K vs iMac Pro...