The primary difference lies in how data is moved. eMMC 5.1 uses a interface, meaning it can only read or write at one time. UFS 2.2 is full-duplex , allowing it to read and write simultaneously, which is critical for smooth multitasking and heavy app usage.
UFS 2.2 and eMMC 5.1 cater to different market segments, with UFS 2.2 targeting high-end devices and eMMC 5.1 suitable for budget-friendly and mid-range smartphones. While eMMC 5.1 remains a reliable option, UFS 2.2's superior performance capabilities make it an attractive choice for those seeking the best storage experience. ufs 22 vs emmc 51 link
Closely related to the duplex mode is how each standard handles commands. eMMC uses a simple "First-In, First-Out" (FIFO) queue. It processes commands one by one, in the exact order they are received, and cannot reorder them for efficiency. This works for sequential tasks but creates bottlenecks when a device is inundated with random read and write requests. The primary difference lies in how data is moved
| | UFS 22 | eMMC 5.1 | | --- | --- | --- | | Sequential Read Speed | Up to 2000 MB/s | Up to 600 MB/s | | Sequential Write Speed | Up to 1200 MB/s | Up to 250 MB/s | | Random Read Speed | Up to 10000 IOPS | Up to 5000 IOPS | | Random Write Speed | Up to 5000 IOPS | Up to 2000 IOPS | eMMC uses a simple "First-In, First-Out" (FIFO) queue
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