i'm using UBCD and i want to run MHDD. i get a win 98 (i have vista) startup screen where i can choose between start computer with ADAPTEC SCSI adapter support or without the support. what should i choose?

If you need to scan a SCSCI drive and have a adaptec compatible SCSCI PCI card isntalled in your system then choose Start with Adaptec SCSCI- otherwise choose without.
Either way- nothing will blow up.

PS Backup your data

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It seems that the unluckiest people in the world are those that don't backup.
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i tried both but then i get an error:
"the drive does not support LBA mode or not detected"

Well then- we need more information about the history and the specs of the drive.
I suggest not plugging it in any more - but are you sure the ide cable is ok and plugged in properly or sata?
does the drive knock / click - does it show in bios?

_________________
It seems that the unluckiest people in the world are those that don't backup.
Free Solutions
Picasaweb- Pictures and movies | Dropbox - Documents and other..

the drive is WD 5000AAKS 500GB 7200 16MB. i'm pretty sure it's plugging ok, but i'll check it again. the drive doesn't knock / click, it doesn't make any sound (but it's alive, for now).

If you need data, I would suggest to stop playing with it and seek for a professional advice. You can try contacting Peter (pepe) on this forum. He is in your reach.

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Bitlevel Data Recovery

ditto

_________________
It seems that the unluckiest people in the world are those that don't backup.
Free Solutions
Picasaweb- Pictures and movies | Dropbox - Documents and other..