Use one external harddrive on both pc and mac at the same time

i bought an iomega external harddrive today
can i use it on both mac and pc at the same times?
for ex:
when i plug in both computer
i could able to read and write on the hdd on both computer
since i format it into 4 partitions (2 journal and 2 doc)
so i wish i can use them separately in 2 computers

Hi Jerry_L and welocme to Discussions,
using such USB or Firewire connected external harddrives with two computers at the same time is usually not recommended by the manufacturer.
Doing so might lead to data-loss and the like.
Check with the manual of that harddisk to verify.
Using it with one computer at a time with your partitioning should be doable.
Regards
Stefan

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