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Memory Upgrades for 2019 Mac Pro - Save Up to 65% vs Factory Costs
OWC Envoy Pro Elektron

Ultra-high performance across entire capacity, outperforms the competition.

Tiny, bus-powered, rugged, compact!


√ No more slow and noisy hard drives!

Why Use RAID-5?

RAID-5 is a fault-tolerant flavor of RAID that can be understand as “RAID-0 striping with parity”. RAID-5 offers an attractive blend of performance along with resilience in the face of a drive failure:

  • Offers performance approaching that of RAID-0 striping.
  • Efficient blend of speed/space: capacity of one (1) drive is used for parity; for example, a 4-drive RAID-5 offers the capacity of three drives.
  • Tolerates the failure of one drive.
  • Can be restored to fault tolerance quickly by replacing a failed drive.
  • Ideal for very large data stores where downtime and restoration are problematic (e.g. schedule/deadlines).
  • Highly attractive for usages like storing video and other larger data sets where high capacity is needed with some degree of fault tolerance.
  • Distributes the parity data across the drives (RAID-4 is similar to RAID-5, but dedicates a drive to parity).

RAID-5 requires at least 3 drives , but an ideal number tends to be 4 drives (roughly triple speed at the loss of capacity of only one drive).

Even a 3-drive RAID-5 is quite attractive (capacity of 2 drives) or a 5-drive RAID-5 (capacity of 4 drives).

At 6 drives or more, the risk profile rises (probability of a drive failure), but even 8 drives might be acceptable for some purposes (RAID-6 offers dual parity drives, and perhaps future software RAID will support that).

Creating an 8-drive RAID-5 volume in SoftRAID
OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

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OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available


Great for travel or for desktop!
OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!
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Datacolor SpyderCHECKR Color Chart and Calibration Tool for Digital Cameras
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