SCSI Controller Question

[Derek Ragona]

If you are using the drives as just SCSI drives and get another controller 
in the same Manufacturer's "Family" you should be able to just replace the 
controller.

If you use a different manufacturer's controller, you may have to re-format 
the drives after you do a dump on the old controller.  The reason is that 
there are no "standards" for drive geometry translation.  SCSI drives are 
made to appear to the OS as a series of logical blocks by the 
controller.  The way the controller translates the actual geometry to the 
logical blocks can differ on different manufacturer's controllers.

         -Derek


At 02:30 PM 10/30/2006, Wayne wrote:
>Hey Guys,
>
>Not entirely FreeBSD specific, but I was hoping someone could help with a 
>question about SCSI controllers.
>
>One FreeBSD system here is running drives on an old Adaptec 2940 
>controller.  I would like to upgrade the controller, as the drives are 
>actually Ultra 160 capable.  Can you normally just swap SCSI drives onto a 
>different controller, and still access all the data?  (like with IDE)  Or 
>will I need to dump & restore, also?
>
>   -Thanks,  Wayne
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