Help: Errors In alert log file

Hello all,

I was checking my alert log file saw the following errors:

kccexpd: controlfile not expanded: would require 30276 block(s), max is 20000
krcpwnc: following controlfile record written over: RECID #480930 Recno 21067 Record timestamp 06/30/00 20:42:24
Thread=1 Seq#=557071
  Flags:
  Resetlogs scn and time
scn: 0x0000.0000334c
05/27/99 14:35:10
  filename /u06/oracle/arch/log557071.arc   Low
scn: 0x0000.02cde95e
06/30/00 20:42:22
Next
scn: 0x0000.02cde9a0
06/30/00 20:42:24
  Block count=500 Blocksize=1024
Wed Jul 5 09:28:11 2000
kccexpd: controlfile not expanded: would require 20576 block(s), max is 20000
krcpwnc: following controlfile record written over: RECID #530834 Recno 13829 Record timestamp 06/30/00 09:45:18
Thread=1 Seq#=548343 Link-Recid=530833
  Low
scn: 0x0000.02c5c00f
06/30/00 09:45:16
Next
scn: 0x0000.02c5c048
Thread 1 advanced to log sequence 588767   Current log# 2 seq# 588767 mem# 0: /u02/oradata/oracle/redo02.log Wed Jul 5 09:28:11 2000
kccexpd: controlfile not expanded: would require 30276 block(s), max is 20000
krcpwnc: following controlfile record written over: RECID #480931 Recno 21068 Record timestamp 06/30/00 20:42:26
Thread=1 Seq#=557072
  Flags:
  Resetlogs scn and time
scn: 0x0000.0000334c
05/27/99 14:35:10
  filename /u06/oracle/arch/log557072.arc   Low
scn: 0x0000.02cde9a0
06/30/00 20:42:24
Next
scn: 0x0000.02cde9e1
06/30/00 20:42:25
  Block count=500 Blocksize=1024
Wed Jul 5 09:29:12 2000
kccexpd: controlfile not expanded: would require 20576 block(s), max is 20000
krcpwnc: following controlfile record written over: RECID #530835 Recno 13830 Record timestamp 06/30/00 09:45:20
Thread=1 Seq#=548344 Link-Recid=530834
  Low
scn: 0x0000.02c5c048
06/30/00 09:45:18
Next
scn: 0x0000.02c5c07e
Thread 1 advanced to log sequence 588768   Current log# 3 seq# 588768 mem# 0: /u01/oradata/oracle/redo01.log

I have checked the disk space for the filesystems in which my control files reside & they all seems to have enough space, if its the space problem. For that SCN errors, do i have to reset my logs, incase its not matching SCN # in control file with the current one.

Thanks in advance

Salu