SMax77 Posted October 14, 2015 Share Posted October 14, 2015 Hi, all. I've faced a problem with my 7200.12, looks like a "0 LBA" shown here. After power up it sounds "t-r-r-r-r" 4-5 times and stops. But the main problem is that I can not receive any answer from hdd to terminal 0x1A command (hex Ctrl+z command, isn't it? I'm using very simple "Terminal" with hexadecimal transmitted codes). RS232 - TTL adapter connected correctly (sure by a huge number of forums and oscilloscope - I'm electronic engineer). My hdd do not respond me in any condition of PCB and the brick:Fully connected - failed,Motor disconnected (by isolator) - failed,heads disconnected (by isolator) - failed. hdd "no reply" state is confirmed with oscilloscope (no changes on sygnal). port settings : 38400, 8 data, 1 stop, no parity, no handshaking.hdd: SN: 6VPEDKLG model:ST31000524AS firmware: JC4B PCB 100574451 rev.B Could anybody help me? May be I need to short something? disconnect something? Send other command? Thanks a lot in advance. Link to comment Share on other sites More sharing options...
jaclaz Posted October 17, 2015 Share Posted October 17, 2015 There are some models that possibly need to have the "Read Channel" shorted, see:http://www.msfn.org/board/topic/172245-720012-terminal-unlock/ But the issue here is that even once you will have access to terminal you won't know which exact commands to issue or how to diagnose the exact problem, the:"t-r-r-r-r" 4-5 times and stops is likely to be something that you cannot simply recover via terminal commands. jaclaz Link to comment Share on other sites More sharing options...
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