switching HW encryption on/off when tapes are partially full
Hello,
just to want to know if somebody has the same experience (it is about HP library LTO7 HW encryption, but it probably does not matter):
- when you switch HW encryption from on to off , Active/Full media with encrypted images cannot be read/written, ending with "error reading header block" and set to Frozen state. Thats expected.
- when you switch it from off to on, partially full (=Active, and HW unencrypted) tapes cannot serve for writing additional images. A new job writing attempt is ending with " could not write tape mark to begin new image" and tape set to Frozen, too. That was a bit unexpected to me, since I thought that tape can start with unencrypted images and go on with encrypted images from some point. But it seems encr is on tape level and not image level.
Does somebody have any comments to this topic?
regards
Michal
- Then the answer is simple.
You need new or free tapes (all backups on the tape are expired)