Commands in Level 2 are used to read/write firmware modules etc.
Command U is to spin up motor while command Z is to stop motor.
Command H is to choose head # with the format of Hx, where x stands for head #.
Command r is to read data from current cylinder with the format of rx,y,z,a.
—x stands for initial sector need to be read; if x is input, it means to read data from data area.
—if x is not input, it means to read data from initiao sector of service area.
—if y is input, z stands for length in sectors.
Command s is to seek to cylinder and head with the format of sx,y,z.
—x stands for physical cylinder.
—y stands for head #.
—z is valid key, the command is valid only when z is 22.
Command w is to write data to current cylinder with the format of wx,y,z,a.
—x stands for initial sector need to be written.
—y stands for current sector # and is only valid when x is not input.
—z stands for length in sectors.
Command x is to display zone allocation.
lll
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