Re: Things I learnt installing a v7.1.4 TSM for VE data mover

2016-01-06 Thread Schofield, Neil (Storage & Middleware, Backup & Restore)
Mike I agree wholeheartedly. > *Thank you for pointing this out, Neil,* I will sadly have to lock my environment down at 7.1.2 or 7.1.3. Sadly it may not be that simple. The new thing I learnt today is that while IBM use the 'good' VDDK (v6.0.0) with both 7.1.3.0 and 7.1.3.1, the interim fix

LTO-5 Compression ratio

2016-01-06 Thread Martin Janosik
Hello all, I'm looking for an advice or hint with following situation: On one TSM server I'm observing weird (pretty high) compression ratio on most of tapes. I wonder if it is possible to replicate this "success" to other TSM server(s) with same/similar configuration, but I'm clueless on where to

Re: LTO-5 Compression ratio

2016-01-06 Thread Skylar Thompson
Tape compression ratios aren't so much dependent on server configuration as incoming data. If you have incoming data that's similarly compressible I would expect the compression ratios to be similar on the other servers. FWIW, I've gotten upwards of 20TB on LTO6, before our researchers realized th

Re: LTO-5 Compression ratio

2016-01-06 Thread Nick Marouf
Hello, That compression seems to be reasonable. We have hundreds of LT06 tapes with 9-10TB on average.