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% m1 v6 J7 `8 _/ t" I2 S% M. u[font=Verdana]Here, we only discuss NVRAM of laptop HDD. ( In desktop HDD, NVRAM is identical for a same family). The picture below shows you typical data structure of NVRAM.( @- K9 V$ o0 @* Y
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[font=Verdana]1: NVRAM version, "A60A"2 `7 c% D4 p- g) e) ~/ E" S
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, t j9 O3 n8 `3 q[font=Verdana]2: Version checksum, "1E602135" (High byte backward, low byte forward)% ^7 l% v( R: c {2 o* u& Q
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[font=Verdana]3: FW boot flag. "0x01", boot from SA-A; "0x00" from SA-C, factory copy.; M1 D8 E3 Q0 @* a
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[font=Verdana]4: Head map "00 01 02 00"
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[font=Verdana]5: Adaptive parameters of data area, "14F1" (High byte backward, low byte forward)8 H; `9 ]4 H2 t: w y
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[font=Verdana]6: Adaptive parameters of data area, "83F8" (High byte backward, low byte forward).
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) E, s( Q P& ~7 m$ N[font=Verdana]7: "XGH7Z3DM", S/N on the label.
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3 ^8 N9 Y0 P, ~[font=Verdana]Attention: the offset of those strings differs from different drive family.[/font]8 g3 Q8 q6 e& H# G" X
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发表于 2009-8-7 09:47:00
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发表于 2011-1-25 11:51:00
