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Definition: mSATA

(Mini-Serial ATA) A version of the SATA interface for solid state drives (SSDs) in mobile devices. mSATA uses the same plug and socket as Mini PCI Express (mPCIe); however, the electrical signaling is different. mSATA was superseded by M.2 (examples of both are below). See Mini PCI Express and SATA.

SATA SSDs on mSATA and M.2
Both of these cards hold SATA SSDs. On top is the mSATA card format, while the bottom card is the newer M.2. See M.2.