hello unix admin folks

I need to clean up my root filesystem
because a backup caused the fs full.
I know that it accidentally write some
file with big size to root

I tried the find command with type c and
access time 2 days ago but it didn't help
much

# find . -ctime -2 -size +1000000c \
-type -c -exec ls -ld {} \; |more

it listed out
crw-rw-rw- 1 root tty 22, 0 Aug 10 16:47 ./devices/pseudo/sy@0:tty
crw-rw-rw- 1 root sys 33,267 Aug 8 18:37 ./devices/pci@1f,4000/scsi
@2/st@4,0:
crw-rw-rw- 1 root sys 33,271 Aug 9 19:51 ./devices/pci@1f,4000/scsi
@2/st@4,0:n
crw-rw-rw- 1 root sys 33,343 Aug 10 04:44 ./devices/pci@1f,4000/scsi
@2/st@4,0:hbn

What are these entries meant ?
How do I find out what size of these major/
minor devices ?

I don't want to delete them by mistake

Please advice

Thanks so much in advance

Regards

fishe@hotmail.com