FTL in consumer flash devices
Posted Jul 24, 2008 18:05 UTC (Thu) by brouhaha
In reply to: UBIFS
Parent article: UBIFS
In the "consumer flash devices" you cite (SD cards, USB sticks), the FTL is entirely embedded and hidden inside the flash device itself. That's also true of MMC cards and CF cards. It was NOT true for so-called "SmartMedia", but that died a well-deserved death. I'm not sure about some other types such as Memory Stick and XD cards.
Filesystems that work with such devices are all the normal Linux
hard drive ones - ext3, JFS, XFS, vfat - but they are wholly dependent on the FTL to work.
Acutually, the filesystems are wholly independent
of the FTL. Brand X and Brand Y SD cards might have any entirely different FTL embedded in them, but ext3 doesn't know or care, because they present the same interface to the system.
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