But I’ve read numerous postings here about the “importance” of updating the ASPI layer,
What you have read is by all means untrue. There is nothing important in updating the ASPI layer. Let me explain a few things.
ASPI (Advanced SCSI Programming Interface) are a bunch of drivers that are needed for certain hardware to communicate with eachother. This kind of software can be already built in in the OS (as in WinXP-2000) or can be installed by the user. Since i have never rendered into any problems with ASPI, i have istalled them in any system i owned up to now.
Now as long as the ASPI layer does its job and you have no problems with your scsi devices, nor with burning - ripping mp3s (where ASPI are also needed), there is no reason at all to update your ASPIs. Newer versions of ASPIs are there to solve some problems that previous versions have cauzed/developed. They will all, at the end of the day, do the same job though. Updating to a newer version of ASPI (while you had no problems with the previous) will not guarantee you won’t run into problems with it. So why experiment?
What people should just do is check now and then whether the ASPI layer is properly isntalled. It is possible that by uninstalling/installing different software that uses the ASPI to work (ie: burning apps) you might f**k up the ASPI layer. This ain’t a problem caused by bad ASPI, it is cauzed by badly installed ASPI. A reinstall usually solves everything. You can check whether the ASPI layer is properly installed in your system with apps like aspicheck (for adaptec).
Conclusion: don’t have to mess/update ASPI if they ain’t cauzing any problem.