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TESTED: OWC 40TB Thunderbay 4 Mini SSD with RAID-0 Stripe and RAID-4 Fault Tolerance

GetOWC Thunderbay 4 Mini SSD RAID Edition at MacSales.com.

Following up on yesterday’s overview of OWC 40TB Thunderbay 4 Mini SSD, below are performance results with both RAID-0 striping and RAID-5 fault tolerance.

RAID-0 striping

This is the best performance MPG has ever seen with Thunderbolt 2 (or from any external SSD). It sets the new benchmark.

  • Read performance flatlines at 1425 MB/sec
  • Write performance flatlines at 1192 MB/sec
30TB RAID-5 SSD: OWC Thunderbay 4 Mini

Those are average figures across across a gigantic 39.37TB volume! Context: those figures beat the internal 1TB SSD in the MPG 2013 Mac Pro. It looks like Thunderbolt 2 has throttled the read performance. MPG expects OWC to offer a similar solution with Thunderbolt 3 in 2017, in which case the read speeds should rise to even higher levels.

RAID-4 (fault tolerance)

This is the best performance MPG has ever seen with Thunderbolt 2 (or from any external SSD). It sets the new benchmark.

  • RAID-4 Read performance flatlines at 1224 MB/sec
  • RAID-4 Write performance flatlines at 853 MB/sec

The RAID-4 performance is outstanding in two ways:

  • Flat line consistency across the entire 29.8TB volume.
  • Data rates within a few percent of the theoretical speed, that is, 75% of the speed of RAID-0.

It’s a superlative performance from four SSDs in the Thunderbay 4 Mini witih SoftRAID.

Tested using a> disktester fill-volume --xfer 128M with diglloydTools disktester

Graph shows writes read filling the volume to 99% capacity with 1000 test files.

RAID-0: Write @ 1137 MiB/sec = 1192 MB/sec, Read @ 1359 MiB/sec = 1425 MB/sec
RAID-4: Write @ 814 MiB/sec = 853 MB/sec, Read @ 1167 MiB/sec = 1224 MB/sec
RAID-5: Write @ 814 MiB/sec = 854 MB/sec, Read @ 1003 MiB/sec = 1052 MB/sec

Sustained transfer performance with a 40TB RAID-0 stripe vs 30TB RAID-4 SSD configuration in OWC Thunderbay 4 Mini
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