Hey everyone,
ST1000DM003 (PN 9YN162-302, fw CC4C) showing symptoms of bad heads (spin up ok, a number of "clicks" then spin down. Not recognized by BIOS, serial port shows this on bootup:
Code:
Boot 0x40M
Spin Up
FAIL Servo Op=0100 Resp=0003
ResponseFrame ED00 0052 03B2 35C0 0008 0000 0000 0000 0DF1 0000 0000 0000 0000 0000 0000 0000 4288 4AE2 C6DC D2D7 CADD 505F A5C1 3E18 0379 8900 0000 007F 0000 0000 001B 0004 0010
(there is a "FAIL Servo" and "ResponseFrame" for each click, and the messages stop when the clicks stop and the drives spin down)
Serial console not available, no response to ^Z or ^R or ^L (or anything). I swapped the PCB with another from hddparts and swapped the BIOS from the original board to the replacement board; the problem persists.
Everything points to weak or bad head and head swap as the solution. I have *not* opened the drive to inspect media as I do not have a proper cleanroom environment.
I have a few questions. I'd appreciate any assistance/clarifications. While I would like to have the data on the drive, it's not an absolute requirement. This is more for learning/self education.
- Is this a "grenada" or "F3" drive? I am having trouble figuring out the specific device "class" this drive belongs to
- Is there any way to gain access to the debug console? I tried a few different methods (isolating the spindle motor, isolating the head connector, trying to short just the rx pair) but it's nonresponsive
- I have a newer and working ST1000DM003 (PN 1ER162-300); would this drive have compatible heads?
- That newer drive has a PSID written on the label, does this affect its compatibility with the older dead drive?
- If I successfully swap the heads, should I replace the donor drive's Flash on to the patient drive to keep the head adaptives matched with the preamp/heads?
- Right now I have no way to access the console - how can I modify the head adaptives to try to get the new heads to work (if necessary)?
- Is it easier to do a platter swap with a known good (same model/pn/date) drive? I *think* the older drive has 1TB/platter and one head, but without the console and without opening the lid it's impossible to know
I'm an embedded systems EE by trade; I have no issues with reading/modifying the flash, but what i don't know is which areas to modify and in what way. Are there any docs detailing the process for this drive?
Finally... I've read a bit about finding compatible head assemblies; it really does seem like a crapshoot on these drives, basically try to match the PN and date codes as closely as possible to increase chances of success, but that's about it. I've also read that you can use a head assembly with more physical heads than are necessary.