Actually, SCSI HDDs
can't be low level formatted at all (yes, I know - server grade HDDs can, but there's no need for that here nor tools for the Amiga). Low level formatting rewrites all sector headers and gaps and is done in the factory.
You probably mean zeroing all blocks (normal format) - well, doesn't hurt, but isn't required. It will however do some testing of the surface which might have grown bad blocks over time. Those will be automatically remapped during zeroing the disk. No, you won't lose any capacity, remapping is done by using reserved blocks. And you won't want any bad blocks in use, would you?
