ijor wrote:Most MFM drives can work with RLL without problems. RLL uses the same density as MFM. Those MFM drives were manufactured before RLL controllers reached the market. They just weren't factory tested with RLL.
AtariZoll wrote:I don't think that "RLL uses the same density as MFM." is good formulation. Even if flux density (or whatever is proper term) on surface might be same, structure is different.
1st1 wrote:Bad track list remains the same, because it does not contain sector numbers, only tracks and heads.
czietz wrote:1st1 wrote:Bad track list remains the same, because it does not contain sector numbers, only tracks and heads.
This is not exactly true; the defect list printed on my MFM HD also contains the location of the defect in "bytes from index mark" (BFI). If I were to format it with RLL, I suppose I would have to multiply the BFI value with 1.5.
ijor wrote:I would recreate the bad sector list if you perform a low level format anyway. May be just run some software that performs a surface test and marks the bad clusters at the high level format.
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