Old SAMSUNG HDDs

Hello everybody !

I had some old SAMSUNG HDDs , WU31605 , SV0211A etc. (few GB capacity) with problems on the SA / defective sectors.
HUTIL does not support those "too old" drives.
They are completely useless, but just for educational purposes I tried to discover "what's inside". I discovered is possible to put the drive in a "boot mode" , probably for connecting via terminal / console and give specific commands i.e. for selfscan and /or write configuration tables.
Someone got the drive connected to serial or other interface to PC and discovered how works or know something more ?
Next step will be reading the ROM chip on the PCB.
By the way, if someone of you want to experiment with a scope to see servo , head and other signals, the PCB of the SV0211 is VERY WELL DOCUMENTED as you can find a lot of test points with the name, and as the recording density is low, even with a low-bandwidth scope is possible to trigger and show those signals.
Want someone of you share some knowledge here ?
Thanks.

Hello!

Some time ago I connected SV0332A via terminal (can't recall the speed - 38k or 56k), got commands list via HE command:

Code:: * Adaptec DMC Debugger V3.1 Active * Serial Port ESC break A474: 9802 subl r2 , a0 DBG2>HE1 Debugger Commands: BC Brkpoint Cancel BD Brkpoint Display BS Brkpoint Set #add DA DisAssemble #add #num DR Dsplay Registers GO GO from brkpoint SS Single-Step from brkpoint DBG2>HE2 Svo Commands: GT Get Track S2 Seek-Seek LK Lock to servo data SC Seek Calibrate OA Outport Addr #id #add SD Spin Down OD Outport Display SI Seek Inc OG Otprt Gain #id #val (10=unity) SK Seek #cyl #head OO Otprt Offset #id #off SR Seek Random OR Otprt extrnl Reg #id #reg SP Seek Pumped Resonance OS Otprt Send data ST Servo Trace buffer dump O# Set offtrack {# * 5 SU Spin Up PK Park VS Set VTC word #regbyte DBG2>HE3 Misc Serial Commands: CI Set Ir/Iw {Ir {Iw}} * OBSOLETE * CR Chnl Rd Value {reg#} CS Chnl Set Value {reg#val..reg#val} CU Chnl Update Values to Disk DB Dsply Buffer {adrs len page} DI Set Debug Interface Flags 0001 = Dsply Chnl Prgrmng 0002 = Force Chnl Prgrmng 0004 = Dsply RCM Calls 0080 = Update All Zones on CS Cmd WB Wrt Bffr {adrs val page cnt} CG Chnl Get Value from rdChan{reg#} DBG2>HE4 ROM Monitor Commands: C Call overlay #add P display Pgm #add #len D display Data #add #len Q read pgm #add DO DO R Ram test #add #len E read data #add RT Reset [0=soft,1=hard] G Go dwnld #addr S checkSum data #add #len HE Help #screen T checksum code #add #len ID Init Data #add #len #val TR Trace bfr dsply #add L downLoad #add #cnt WH While #times #flg [4=noerr,1=noprint] M Mdfy interactv #add WT Wait #msec MD Mov Data #src #dst #len X dsply all eXtrnl regs MP Mov Pgm #src #dst #len Y modify extrnl reg #n #val N modify wrd #add #val Z dsply extrnl reg #n DBG2>HE ROM Monitor Commands: C Call overlay #add P display Pgm #add #len D display Data #add #len Q read pgm #add DO DO R Ram test #add #len E read data #add RT Reset [0=soft,1=hard] G Go dwnld #addr S checkSum data #add #len HE Help #screen T checksum code #add #len ID Init Data #add #len #val TR Trace bfr dsply #add L downLoad #add #cnt WH While #times #flg [4=noerr,1=noprint] M Mdfy interactv #add WT Wait #msec MD Mov Data #src #dst #len X dsply all eXtrnl regs MP Mov Pgm #src #dst #len Y modify extrnl reg #n #val N modify wrd #add #val Z dsply extrnl reg #n DBG2>

Similar outcomes can be obtained form VA34323A.

I don't have any documentaton for those drives. Hutil says "too old" but Leo (found on some forum) can access them.

Currently I haven't got those drives so if anything I could provide it can take some time.
I'm interested in the terminal mode commands for direct positioning of actuator, servo reading and motor control (till now only in Seagate/Conner I can do this). Any help will be appreciated.

PS:
I also got some commands from CT210 drives:
http://forum.hddguru.com/connertech-.ex ... t5802.html