остановил mysql
удалил .err
запустил mysql
началась репликация
040419 13:04:03  InnoDB: Started
MySql: ready for connections.
Version: '4.0.18-nt'  socket: ''  port: 3306
040419 13:04:05  Slave I/O thread: connected to master 'repl@rs1u:3306',  replication started i
n log 'rs1u-bin.005' at position 88415
show slave status
Master host rs1u 
Master_Log_File rs1u-bin.005 
Slave_IO_Running Yes 
Slave_SQL_Running Yes 
Last_errno 0 
Last_error  
Skip_counter 0 
Exec_master_log_pos 88742 
Relay_log_space 327 
ОСТАНАВЛИВАЮ mysql
выдергиваю кабель
запускаю mysql
040419 13:16:01  InnoDB: Started
MySql: ready for connections.
Version: '4.0.18-nt'  socket: ''  port: 3306
040419 13:16:02  Slave I/O thread: error connecting to master 'repl@rs1u:3306': Error: 'Unknown MySQL Server Host 'rs1u' (11001)'  errno: 2005  retry-time: 60  retries: 86400
вижу ошибку соединения в файле err
выполняю show slave status
Master_Host    rs1u 
Master_User    repl
Master_Port     3306
Connect_retry    60
Master_Log_File    rs1u-bin.005 
Read_Master_Log_Pos   89395 
Relay_Log_File       lifebook-relay-bin.004
Relay_Log_Pos     4 
Relay_Master_Log_File   rs1u-bin.005 
Slave_IO_Running    yes
Slave_SQL_Running  yes
Replicate_do_db  bank
Replicate_ignore_db   bant_tmp
Last_errno  0
Last_error    
Skip_counter   0  
Exec_master_log_pos   89395 
Relay_log_space    0
-~{}~ 19.04.04  13:31:
1 system user   NULL Connect 36 Connecting to master NULL 
 2 system user   NULL Connect 36 Has read all relay log; waiting for the I/O slave thread to update it NULL
 
3 root localhost:4910 bank Query 0 NULL SHOW  PROCESSLIST
-~{}~ 20.04.04  18:43:
видимо никто не знает