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IOPS vs Throughput (MBps)?

\text{IOPS} * \text{TransferSizeInBytes} = \text{BytesPerSec} (with the answer typically converted to MegabytesPerSec)

Some ballpark numbers:
DeviceTypeIOPSInterfaceNotes
7,200 rpm SATA drivesHDD~75-100 IOPS[2]SATA 3 Gb/s
10,000 rpm SATA drivesHDD~125-150 IOPS[2]SATA 3 Gbit/s
10,000 rpm SAS drivesHDD~140 IOPS [2]SAS
15,000 rpm SAS drivesHDD~175-210 IOPS [2]SAS


Solid State Devices ranges 60,000 to 400,000 IOPS depending the type of brand/model and connectivity (SATA cable (3g/6g), FC/InfiniBand, or PCIe). Info from - http://en.wikipedia.org/wiki/IOPS


As of Jul 2012, the SSD max throughput is still below 600MBps for SSD and 1GBps using PCIe technology. SATA cable can transfer max 6Gbps (or 768MBps - 6Gbps/6bit). With PCIe, this can double to 16Gbps (or 2048MBps). There is a need to seriously look into the storage design how the disk should be connected (SATA cable or PCIe) for optimum performance. Or else, you would buy an expensive SSD which will be underperformed due to the throughput. 


SSD - http://en.wikipedia.org/wiki/Solid-state_drive
SATA cable - http://en.wikipedia.org/wiki/Serial_ATA
Data unit conversion - http://en.wikipedia.org/wiki/Megabytes_per_second#Megabyte_per_second

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