EXTERNAL HARD DRIVE NO LONGER RECOGNIZED, DOES NOT MOUNT

Hello everyone, this is not necessarily a mac mini issue
last night was working on my mac mini (intel 2007), it froze up, couldnt even restart, so i held the power button (hard reset i guess)
it came back on but then would NOT recognize my external HD, (which is an iomega mini max 1TB)
perhaps this was considered by my mac as "not ejecting or putting the disc away properly "
i did a ton of research (here and elsewhere)..found various hints/fixes but nothing works so far
i tried using different cables, firewire, usb..ran hardware test...zapped the pram....tried it on my ibook (which also does not recognize it)...turned the hd off and on...
i unplugged everything, power to mac, all cables.. left overnight...tried again with no luck
restarted, powered down...nothing
tried finding the the external hd partitions in "/Volumes" to trash. there was ONE of the partitions there, which i trashed - no luck (i had 3 partitions on the external hd)
was going to swap the hd to another enclosure, but the mini max hd wont fit it/work
disk utility doesnt see it
i tried a few things with terminal - nothing
i am unable to open firmware (via commandoption+OF, as this is an intel)
it doesnt seem to be a problem with the firewire port, as that port recognized my video camera
im pretty sure the HD and my data is fine, its just that my mac doesnt recognize it. its like its already "on" or "mounted"
it cant find the path or map or something like that
in system profiler it comes up as:
"Unknown Device:
Manufacturer: Unknown
Model: Unknown Device
Maximum Speed: Up to 400 Mb/sec
Connection Speed: Up to 400 Mb/sec"
any ideas? why would force shutting down (by holding the power button) cause my mac to no longer recognize the external HD?
i have NOT tried "discwarrior" or norton. trying to avoid having to pay $100 and i read that others with this problem bought discwarrior, which didnt see it or help
i did try something called "total recall" by virtualab - it did NOT see the external HD
and as i mentioned above, disk utility does not recognize it
ok please let me know, i could really use some help here
i do usually backup to dvd's but not everything..also did a ton of work recently that was NOT backed up
hope to hear from you soon!!!
thanks in advance, andrew

hello, i dont have a UPS but have it connected to a power strip
what might this mean?
btw - when this first happened (3 days ago) i used disk utility/first aid to examine my mini, it PASSED
yesterday i thought what the heck, ill run first aid again
and this is what i got:
verifying volume "mac mini"
checking HFS plus volume
checking extents overflow file
checking catalog file
incorrect block count for file AbletonTmp-0001
(it should be 1 instead of 0)
1%)
checking multi-linked files
checking catalog hierarchy
checking extended attributes file
checking volume bitmap
checking volume bitmap
or repair",0)
checking volume information
volume header needs minor repair
the volume mac mini needs to be repaired
error: the underlying task reported failure on exit
1 HFS volume needs repair
it wasnt able to fix it while booting/running off the mini so
i then ran disk utility on the OSX install disc and was able to fix that problem
but alas, no luck with the external HD, still not recognized
the AbletonTmp-0001 makes sense because that was one of the programs i was running when it crashed
i was hopeful that fixing that problem would help.
ive been through quite a few crashes and restarts like that, i wonder why this time it caused such a serious problem
i would imagine there are a ton of people who have to force a restart or dont eject the HD, or unplug it, etc
i wonder why there isnt an easier/better way for a mac to deal with an external hd/flash etc. are pc's as sensitive with ex hd's?
ive had to tell new mac owners again and again -"no! you have to eject it first!"
ok well thanks in advance for any further advice/help
it means a lot to me, so thank you!!
-andrew

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