Read/Write errors happens to all tape technologies, in my experience less 
frequently on LTO than many others. If you experience a lot of errors on your 
tapes, fist make sure that you clean your tape drives frequently, then see if 
you can relate the errors to any specific tape drive. If you can, and you 
continue to see problems, contact your vendor for support. 

The capacity of your tapes are related to your compression-rate. Since all data 
is not the same, you'll see different rates for different kinds of data. For 
instance, you might see very high compression rates for some databases, and 
low/none compression rates for already compressed data like jpeg-images, mpeg 
movies, zip/rar/lz compressed files etc. 

Regards,
___________________________________
Anders Granhagen
Atea System Platforms
(Phone: +46 8 4708104   (Mobile: +46 709 197218

-----Ursprungligt meddelande-----
Från: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] För nghiatd
Skickat: den 5 juli 2005 09:02
Till: ADSM-L AT VM.MARIST DOT EDU
Ämne: LTO2 is unconfident

Hi,

I use 4560SLX with two LTO gen2 drives, I have 30 tape LTO2. And now my system 
wrote data on 22 tapes. When I use q vol f=d' to check status of tape, I see :
  a.. 9 tapes have 'Access=Read-Only', 'Number of Write Errors: 1'

  b.. 1 tape has 'Access=Unavailable', 'Number of Write Errors: 1
In addition, Capacity of tape aslo display lot of different value (629,557.2 
MB; 372,665.2 MB; 481,247.3 MB) although capacity of tapes is 200/400 GB.

Nghiatd,