write command

Synopsis

write <interface> <dev[:part|#partname]> <addr> <blk#> <cnt>

Description

The write command can be used for raw writing data to a block device (or partition therein), i.e. without going through a file system.

The block device is specified using the <interface> (e.g. “mmc”) and <dev> parameters. If the block device has a partition table, one can optionally specify a partition number (using the :part syntax) or partition name (using the #partname syntax). The command then reads the <cnt> blocks of data starting at block number <blk#> of the given device/partition to the memory address <addr>.

Examples

# Write to the third sector of the partition named 'bootdata' of mmc device 0
write mmc 0#bootdata $loadaddr 2 1

Configuration

The write command is only available if CONFIG_CMD_WRITE=y.

Return value

The command sets the return value $? to 0 (true) on success and to 1 (false) in case of an error.