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question on flashing ubifs

hello TI friends,

we see following inside DM81xx_DVR_RDK_Install_Guide.pdf in DVRRDK_03.00.00.00

For flashing UBIFS file system to NAND for DVR RDK Hardware (Rev 0.3 or earlier)
UBOOT # mw.b 0x81000000 0xFF 0x2A80000;tftp 0x81000000
ubi_256_DM816X_DVR.img;nand erase 0x009c0000 0xC820000;nand write
0x81000000 0x009c0000 0x2A80000

and see following inside DM81xx_DVR_RDK_Install_Guide.pdf in DVRRDK_04.01.00.02

For flashing UBIFS file system to NAND for DVR RDK Hardware (Rev 0.3 or earlier)
Not Supported

 

May I know the change about flashing UBIFS  between these two version? thanks