Thunderbolt RAID 5 on the iMac is not quite as fast as our SAS RAID 5 scenario on a Mac Pro, but it shows you don't need a Mac Pro to have fast external storage.ģ. Thunderbolt is faster than FireWire 800 by a long shot, as expected.Ģ. SAS RAID 5 (4h) = iStoragePro iT8 6G SAS Expander (four 2TB Hitachi 7K3000s in RAID 5 mode) connected to a HighPoint RocketRAID 2744 installed in a PCIe slot #2 of 2010 Mac Pro WestmereĪpple RAID 0 (4h) = Apple's proprietary Pro RAID card connected to four Seagate Cheetah 15K.6 450GB SAS drives installed in PCIe slot #4 of a 2009 Mac Pro NehalemįW800 RAID 0 (4h) = Wiebetech RTX 400H-QJ enclosure (four 1TB Seagate Barracuda 7200.12s in RAID 0 mode four FW800 ports daisy chained) connected to the 2011 iMac's FireWire 800 single data port.ġ. Tbolt RAID 5 (4h) = Promise Pegasus R4 Thunderbolt RAID enclosure (four 1TB Hitachi 7K1000s in RAID 5 mode) connected to a 2011 iMac 3.4GHz Core i7
SAS RAID 5 (6h) = iStoragePro iT8 6G SAS Expander (six 2TB Hitachi 7K3000s in RAID 5 mode) connected to a HighPoint RocketRAID 2744 installed in a PCIe slot #2 of 2010 Mac Pro Westmere Tbolt RAID 5 (6h) = Promise Pegasus R6 Thunderbolt RAID enclosure (six 2TB Hitachi 7K3000s in RAID 5 mode) connected to a 2011 iMac 3.4GHz Core i7 Tbolt RAID 0 (4s) = Promise Pegasus R4 Thunderbolt RAID enclosure (four 240G OWC 6G SSDs in RAID 0 mode) connected to a 2011 iMac 3.4GHz Core i7 SAS RAID 0 (4s) = Stardom ST8-U5 enclosure (four 240G OWC 6G SSDs in RAID 0 mode) connected to a HighPoint RocketRAID 2722 installed in PCie 2.0 slot #2 of 2010 Mac Pro Westmere. ( RED bar indicates the fastest Thunderbolt config ORANGE bar indicates the fastest SAS config.) Settings were 4.0GB File Size, 2048x1556 10-bit RGB Video Frame Size, 335 frames, file system cache disabled. Then, using the Promise RAID Utility, we set up our RAID 0 set.ĪJA System Test was used to measure large sequential read and write speed. We immediate switched the factory HDDs out for four OWC 6Gb/s SSDs. Finally we had a Pegasus R4 Thunderbolt RAID enclosure in the lab. Then we heard from a "remote mad scientist" with a Promise Pegasus R4 Thunderbolt RAID enclosure - four HDDs in RAID 5 mode. To put it in perspective, we compared it to a six drive RAID 5 set running on a SAS/SATA host adapter on the Mac Pro. While we were waiting to get our hands on a Thunderbolt enclosure, one of our "remote mad scientists" has a 2011 iMac connected to a Promise Pegasus R6 Thunderbolt RAID enclosure - six HDDs configured in RAID 5 mode.
#Promise pegasus r4 raid 5 speeds upgrade
Updated September 14th, 2011, with new target mode resultsĪfter fimrware upgrade of 2011 MacBook Air.
Posted Tue, July 12th, 2011, by rob-ART morgan, mad scientist
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