too many disks ??

lgarion@uranus $ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3              72G   23G   46G  33% /
udev                   10M  208K  9.8M   3% /dev
/dev/sda1              99M  5.3M   89M   6% /boot
none                 1007M     0 1007M   0% /dev/shm
pluto:/mnt/disk1/All  909G  474G  390G  55% /media/pluto
mars:/media/share     184G   93M  174G   1% /media/mars
mercury:/mnt/sdb1      68G  182M   64G   1% /media/mercury
mercury:/var/www       67G  1.1G   63G   2% /media/mercury_web
/dev/sdb1             459G  2.0G  434G   1% /media/spare
/dev/sdc1             466G  118G  349G  26% /mnt/usb