Verifying LTO6+LTFS tapes

I'm using LTO6+LTFS to back up project finals after using LTO4+TAR for years. As a commercial shop, we go back to these archives all the time. (LTO6+LTFS is still in the testing phase.)

Short of copying everything back off the tape and comparing it to the original source, (what I'm doing up to now) does anyone have any clever methods of verifying the data written to an LTO6+LTFS tape? Speed's not the issue, reliability is.

TIA

Ian@Topix