fssnap question

2007-12-25 6:51:00

i have a E250 machine 2 processors
i do a backup for a mail partition /var/mail

now i use fssnap as follow
fssnap -F ufs -o maxsize=2000m, sb=/snap /var/mail
/dev/fssnap/0

my question simply?
what does maximum size means?

1- is it the maximum size i can back it up...means if /var/mail is 30GB , so i
can only the first 2GB?
OR
2- that's value would act like a buffer...one it's full and written it get
from the original file system another size?!

and thanks for help
mostafa

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