v6.2.1.5 is the latest driver. The F/W release B710 is newer than the driver and any documentation just hasn't been recently updated. Keep in mind that all versions of windows now have the appropriate LTO and medium changer driver (unknown). The only advantage the IBM driver has is support for failover which must be licensed. Either driver will work fine with your device. Bob
thanks for the previous answer continuation of the previous question: i have the most current version of the FW  for the TL4000 having a difficult time determining/finding the correct tape drivers for the IBM ULT3580-TD4 SCSI. currently running FW v. A232, need to get to B710 for compatability with the FW v. upgrade for the unit. (A.50) Can you point me to the correct drivers for these tape drives? I may be seeing them & not recognizing i believe it may be the release date 3/22/2011, v.6.2.1.5,A07 although there is no reference to FW B710. greatly appreciate it
DEL TL4000 IBM tape drives firmware