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@@ -0,0 +1,68 @@
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+1. SATA usage in U-boot
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+
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+ Two ways to operate the hard disk
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+
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+ * Raw read/write block from/to SATA hard disk;
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+ * ext2load read file from ext2 filesytem in hard disk
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+
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+1.0 How to know the information of SATA hard disk?
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+
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+ => sata info
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+
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+SATA device 0: Model: ST3320620AS Firm: 3.AAD Ser#: 4QF01ZTN
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+ Type: Hard Disk
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+ Supports 48-bit addressing
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+ Capacity: 305245.3 MB = 298.0 GB (625142448 x 512)
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+
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+1.1 How to save the kernel, filesystem, dtb to SATA hard disk with raw?
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+
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+ Notes: 0x1000 sectors = 2 MBytes
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+
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+ wirte kernel
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+ => tftp 40000 /tftpboot/uImage.837x
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+ => sata write 40000 0 2000
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+
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+ write ramdisk
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+ => tftp 40000 /tftpboot/ramdisk.837x
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+ => sata write 40000 2000 8000
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+
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+ write dtb
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+ => tftp 40000 /tftpboot/mpc837xemds.dtb
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+ => sata write 40000 a000 1000
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+
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+1.2 How to read the kernel, filesystem, dtb from SATA hard disk with raw?
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+
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+ load kernel
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+ => sata read 200000 0 2000
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+
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+ load ramdisk
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+ => sata read 1000000 2000 8000
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+
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+ load dtb
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+ => sata read 2000000 a000 1000
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+
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+ boot
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+ => bootm 200000 1000000 2000000
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+
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+1.3 How to load image from ext2 filesystem in U-boot?
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+
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+ U-boot doesn't support ext2 write to hard disk, so
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+ you have to write the image to hard disk under Linux env,
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+ before you load image from ext2 filesystem.
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+
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+ => ext2ls sata 0:1 /
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+ <DIR> 4096 .
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+ <DIR> 4096 ..
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+ <DIR> 16384 lost+found
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+ 1352023 uImage.837x
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+ 3646377 ramdisk.837x
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+ 12288 mpc837xemds.dtb
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+ 12 hello.txt
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+
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+ => ext2load sata 0:1 200000 /uImage.837x
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+
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+ => ext2load sata 0:1 1000000 /ramdisk.837x
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+
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+ => ext2load sata 0:1 2000000 /mpc837xemds.dtb
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+
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+ => bootm 200000 1000000 2000000
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Dave Liu