LarrySabo
Member
I don’t know if the drive was dropped or not. The partition table is not found on MacBook Pro from whence it came, or by DFL. Lots of bad sectors at beginning LBAs and it really struggles to read everywhere. Heads 2 & 3 fail head test and heads 0 and 1 struggle to read throughout drive -- in spite of pristine-clean and undamaged heads viewed under the microscope.
Swapped heads with two other donors and no change. Platters look clean but I was surprised at the amount of wobble. However, donors that test healthy have similar amounts of wobble. (You can see the reflection of the clean chamber filter screen oscillate as the platters are rotated.) Donors work normally with their heads reinstalled in their HDAs. An exactly matched donor just 5 weeks older than the patient won’t even calibrate. I tried the donor PCB with the patient ROM and no change.
The drive has been imaging with heads 2 and 3 disabled and it’s just inching along at 63% of maximum LBA. With ~30% or LBAs read, a raw scan of the clone provides many usable JPG files but not the couple of critical files. At the current rate, it will take another two weeks to complete the scan using just heads 0 and 1.
Anyone have any suggestions or know what the hell is going on? I thought maybe a platter swap might be informative but want to get as much data as possible before trying that, given my dismal record.
Swapped heads with two other donors and no change. Platters look clean but I was surprised at the amount of wobble. However, donors that test healthy have similar amounts of wobble. (You can see the reflection of the clean chamber filter screen oscillate as the platters are rotated.) Donors work normally with their heads reinstalled in their HDAs. An exactly matched donor just 5 weeks older than the patient won’t even calibrate. I tried the donor PCB with the patient ROM and no change.
The drive has been imaging with heads 2 and 3 disabled and it’s just inching along at 63% of maximum LBA. With ~30% or LBAs read, a raw scan of the clone provides many usable JPG files but not the couple of critical files. At the current rate, it will take another two weeks to complete the scan using just heads 0 and 1.
Anyone have any suggestions or know what the hell is going on? I thought maybe a platter swap might be informative but want to get as much data as possible before trying that, given my dismal record.