Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
September 19th, 2004, 21:10
Playing with HDDL and a lot of 3409AT clunkers.
In all cases have used matching & working pcb and found the following.
A few clunkers re-calibrate with luck and give an opportunity to read SA.
Found that 04HS always is correct - 04 04 00 01 02 03 when the lucky clunker re-calibrates,
which leads to conclude that 04HS is not recorded incorrectly in SA
and the cause of the heads banging - the source is somewhere else ?.
When the clunker does not re-calibrate 04HS is read from RAM as 02 02 00 01
Any ideas ?
The clunkers which re-calibrate mostly show following :
01DM not read to RAM correctly or at all.
02PL and 1BPL vary
06DT in SA and RAM vary, but slightly.
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