Commands in Level 3 work on servo system and is used for checksum test.
Command D is to test seeking time with the format of Dx,y,z,a,b,c.
—if x is input and not 0, it is seeking length; if x is 0, it means random test.
—if y is input, it means slow write seeking; otherwise it means fast read seeking.
—if z is input, it means circulate times; otherwise default value will be used.
—if a is input, random test will be performed on all heads.
—if b is input, test with specified length will be preformed on head #0.
—if c is input, a historical test report will be output.
Command G is to convert hexadecimal cylinder to Gray cylinder with the format of Gx. The command is valid when Cert is valid.
Command Q is to perform read/write checksum test with the format of Qxx,yy, where xx stands for initial sector # in every cylinder with default value 000 and y is length in sectors with default value of remained sectors. If checksum test fails, an error code will be returned.
Command V is to read content of GC1/GC2/GC3 registers with the format of Vx,y,z.
—x is number of register
—y is value of write register.
—z is key value. If z is 1, it means write register.
Command s is to seek to cylinder/head with the format of sx,y,z.
—x is cylinder #
—y is head #
—z is offset of cylinder.
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