JSachs wrote:The adapter is an LSI Logic Sym22910. I visited the mfr's web site and couldn't find a Windows 7 driver for it, although the web site is poorly organized and indexed, so I may have missed it.
And there's also nothing shown on the Microsoft Update Catalog site, so it looks like this card is simply not supported under Win7.
However, MS's Hardware Compatibility List lists this adapter, without comment. From this I infer that LSI Logic does not provide a driver for the adapter because MS includes one in its distribution.
Seems reasonable. And yet you say that you do NOT have a driver, which I assume means you have a yellow exclamation mark on it under "other hardware" from Device Manager, and that it does not show up properly installed under "SCSI adapters".
Now I'm back to the fact that my copy of Windows 7 does not have the adapter's driver even though the adapter was present when it was installed. Apart from the puzzle of "why?" it's not clear how to make Windows 7 install a built-in driver for an installed device when it doesn't detect the device on its own.
Shouldn't work that way.
If you have "check Windows Update" during Win7's install, even if no built-in driver is on the installation DVD the installer will check the Microsoft Update Catalog site for the device's PnP ID, and will retrieve that driver and use it if available. But I couldn't find one, so it's either on the DVD or nowhere.
I'd take the "course of least resistance" at this point, and replace the card with an Adaptec 29160 family SCSI adapter that you can find for around $40. You only need it for your tape drive. Initially when Win7 came out, the 29160 family was not supported but the 29320/39320 family was. Subsequently Adaptec finally came out with a 29160 driver for Win7, so either card will solve your current problem. Best price probably determines your choice.
I'd give up on the LSI card.
You might also consider a more "modern" tape drive, like a DAT device from HP (DAT40-DDS4, DAT72-DDS5, DAT160-DDS6) although they're not cheap, and you'd have to buy new blank media. But depending on your current storage/backup needs the larger/faster tape drives may be more appropriate. They all work fine on those Adaptec SCSI cards I mentioned and also their HP drivers work fine under Win7.