Not able to write to lto4 tapes capacity Not able to write to lto4 tapes capacity comvopr (TechnicalUser) (OP) 23 Nov 09 14:38 lto4 tape status is showing full but only has several MB or just a few GB of valid data, when they should be able to hold a TB. This is happening to two different robots using Commvault. RE: Not able to write to lto4 tapes capacity 605 (Instructor) 23 Nov 09 15:47 Most likely there is a problem with the drive and/or media. If the system has exceeded the maximum number of write errors, the tape will be marked full prematurely.Please compare the values in the Media Properties with the defaults in the settings in the Control Panel's HW Maintenance settings. The default is 6.Finding the origin of this problem is much harder, though.