I have a TL-2000 with dual LTO5 iSCSI drives. In June we began getting CRC errors on jobs written to Drive 2. Cleaning the drive did not help. We disabled the drive, forcing all jobs to use Drive 1. Recently, we decided to replace Drive 2, since we have a lot of jobs we want to run at the end of the year. We purchased a used LTO5 drive and still got CRC errors. We assumed the replacement drive was bad. Last week we started getting CRC errors to Drive 1. I find it very hard to believe that all three drives are bad.
I've performed diagnostics and found no problems. Cannot seem to perform advanced diagnostics on the library using the administrator login. We have a dedicated cleaning slot (23) and the cleaning tape has only seen 27 cycles. The drives do not report needing cleaned.
Is there something else that could cause this behavior other than bad drives?