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The 150d was tested in JBOD and RAID 5 modes with 100 Mbps and 1000 Mbps LAN connections using our iozone-based test procedure. A summary of average read and write throughput for JBOD and RAID 5 with a gigabit LAN connection can be found in Table 1.

Test Iomega
Pro 150d
JBOD Write 18.9
JBOD Read 19.4
RAID 5 Write 15.6
RAID 5 Read 15.1
Table 1: Gigabit LAN Average Throughput - Large filesizes

Note that while the 150d supports jumbo frames, only 9k frame sizes are available. But you won't find 9k Jumbo frame resuts in our NAS Charts because we usually test with 4k jumbo frames. So for the record, the average large filesize JBOD write and read throughput was 19.2 and 21.8 MB/s respectively and 15.0 and 17.8 MB/s for RAID 5 write and read.


  • Firmware version tested was 54.54
  • The full testing setup and methodology are described on this page
  • To ensure connection at the intended speeds, the iozone test machine and NAS under test were manually moved between a NETGEAR GS108 10/100/1000Mbps switch for gigabit-speed testing and a 10/100 switch for 100 Mbps testing.

The NAS Chart Throughput vs. Filesize tool was used to generate a few example plots. The green line in Figures 14 and 15 shows the Infrant ReadyNAS NV, the blue line shows the LaCie Ethernet Disk RAID and the black line shows the 150d (33610).

As you can see in the write test (Figure 14), the 150d unit performs well, handily beating the other two in all cases.

Write Performance
Click to enlarge image

Figure 14: Write Performance

In the read test, things are not so clear-cut, as caching causes the chart to jump around a bit. But even with the varying numbers, the performance of the Iomega is noticeably lower than the Infrant, and generally fairly close to the LaCie.

Read Performance
Click to enlarge image

Figure 15: Read Performance

I also did a simple drag-and-drop test moving files back and forth to the device. To do this test, I used my MacBook Pro, 2 GHz Intel Core Duo with 1.5 GB of RAM running Windows XP SP2 natively. The directory tree I copied contained 4100 files using just over a gigabyte.

I found that with a gigabit connection, moving the files to the 150d (write) took just over 3 minutes (~5.6 MB/s). With a 100 Mbps connection, the same transfer took around 4 minutes, 45 seconds (~3.5 MB/s). Going the other direction, from the 150d to my XP system (read), the transfer took around 3 minutes 15 seconds (~5.1 MB/s) with a gigabit connection and just under 5 minutes with a 100 Mbps connection (~3.3 MB/s).

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