With the OWC Accelsior Pro Q offering nearly double the speed of the original Accelsior, I wondered how much faste IntegrityChecker would run with the higher available bandwidth, particularly using a striped pair of both cards as a RAID-0 stripe.
CPU utilization and throughput was considerably higher with the Accelsior Pro Q, showing that for certain real world tasks, I/O performance can make a considerable difference in performance.
4TB Accelsior Pro Q as 2 X 2TB stripe: 6.3 CPU cores, 2009 MiB/sec = 2106 MB/sec
2TB Accelsior as 2 X 960GB stripe: 3.7 CPU cores, 1127 iMB/sec = 1182 MB/sec
- OWC Accelsior PCIe SSD cards in single OWC Helios 2 enclosure*.
- OWC Accelsior Pro Q PCIe SSD cards in two OWC Helios enclosures on 2 Thunderbolt busses.
- I/O size tested up to 128MB transfers; speed was the same with 8/64/128MB transfers, presumably since IntegrityChecker uses sophisticated I/O techniques.
* Accelsior performance would not likely be faster in dual enclosures on dual busses, since the read speed is about 250 MB/sec below what the Thunderbolt bus can handle.
$600 SAVE $50 = 7.0% OWC 960GB OWC Mercury Accelsior E2 PCI Express High-Performance… in Storage: PCI
$50 SAVE $15 = 23.0% OWC Accelsior S: PCIe to 2.5" 6Gb/s SATA SSD Host Adapter in All Other Categories