Problema com o Squid...

Quando eu restarto o serviço (rcsquid restart), aparece a seguinte mensagem de erro.

rcsquid restart
Shutting down WWW-proxy squid Warning: squid killed !
Starting WWW-proxy squid mkdir: cannot create directory `/var/cache/squid//aufs1': File exists
mkdir: cannot create directory `/var/cache/squid//aufs2': File exists
mkdir: cannot create directory `/var/cache/squid//aufs3': File exists
mkdir: cannot create directory `/var/cache/squid//aufs4': File exists
(/var/cache/squid/aufs4)

Diz que não é possível criar o diretório do cache.
A estrutura no squid.conf está assim:

cache_dir aufs /var/cache/squid/aufs1 2560 32 256
cache_dir aufs /var/cache/squid/aufs2 2560 32 256
cache_dir aufs /var/cache/squid/aufs3 2560 32 256
cache_dir aufs /var/cache/squid/aufs4 2560 32 256
max_open_disk_fds 0
minimum_object_size 0 KB
maximum_object_size 40960 KB
cache_effective_user squid
cache_effective_group squid

Quando eu verifico os logs de erro, me dam as seguintes respostas:

tail -f /var/log/messages

Mar 11 07:36:21 linux-u2tancredo_net squid[5014]: aioSync: done
Mar 11 07:36:21 linux-u2tancredo_net squid[5014]: aioSync: flushing pending I/O operations
Mar 11 07:36:21 linux-u2tancredo_net squid[5014]: aioSync: done
Mar 11 07:36:21 linux-u2tancredo_net squid[5014]: aioSync: flushing pending I/O operations
Mar 11 07:36:21 linux-u2tancredo_net squid[5014]: aioSync: done
Mar 11 07:36:21 linux-u2tancredo_net squid[5014]: aioSync: flushing pending I/O operations
Mar 11 07:36:21 linux-u2tancredo_net squid[5014]: aioSync: done
Mar 11 07:36:21 linux-u2tancredo_net squid[5014]: Squid Cache (Version 3.0.STABLE23): Exiting normally.
Mar 11 07:37:21 linux-u2tancredo_net antivir[5574]: Warning: The file "antivir.vdf" is more than 14 days old.
Mar 11 07:38:10 linux-u2tancredo_net antivir[5587]: Warning: The file "antivir.vdf" is more than 14 days old.

tail -f /var/log/localmessages

Mar 10 22:54:20 linux-u2tancredo_net squid[11500]: Squid Parent: child process 11502 started
Mar 10 22:55:15 linux-u2tancredo_net squid[11540]: Squid Parent: child process 11542 started
Mar 10 23:07:07 linux-u2tancredo_net squid[12293]: Squid Parent: child process 12295 started
Mar 11 06:38:38 linux-u2tancredo_net squid[967]: Squid Parent: child process 969 started
Mar 11 06:45:30 linux-u2tancredo_net squid[1441]: Squid Parent: child process 1443 started
Mar 11 07:08:34 linux-u2tancredo_net squid[3108]: Squid Parent: child process 3110 started
Mar 11 07:12:20 linux-u2tancredo_net squid[3361]: Squid Parent: child process 3363 started
Mar 11 07:28:05 linux-u2tancredo_net squid[4453]: Squid Parent: child process 4455 started
Mar 11 07:28:38 linux-u2tancredo_net squid[4522]: Squid Parent: child process 4524 started
Mar 11 07:31:08 linux-u2tancredo_net squid[5012]: Squid Parent: child process 5014 started

Já apaguei tudo no /var/cache/squid (rm -rf /var/cache/squid/*) depois refiz a estrutura com " squid -z" ele cria a estrutura do cache certinha, e quando eu inicio o serviço, da o mesmo erro.

A permissão está assim, das pastas:

drwxr-xr-x 34 squid squid 888 Mar 11 07:36 aufs1
drwxr-xr-x 34 squid squid 888 Mar 11 07:36 aufs2
drwxr-xr-x 34 squid squid 888 Mar 11 07:36 aufs3
drwxr-xr-x 34 squid squid 888 Mar 11 07:36 aufs4


Alguém poderia ajudar-me ? desde já agradeço, bom dia !