What about client compression?? I have a site that runs client compression with Magstar 3590B drives and I see some them full at 8GB when they are 10GB native. The tape drive compression is actually EXPANDING the compressed client data.
Bill Boyer DSS, Inc. On Mon, 2002-11-25 at 09:32, Zlatko Krastev wrote: > Consider following scenario: > 1. you backup say 40 GB > 2. next day you backup 40 GB of which 35 GB updated - 35 GB from step 1 > expire. > 3. perform step 2 for four days. > > The result you have 40 + 4x 40 GB = 200 GB written on tape. Tape reached > the end and becomes "Full". At the same time you had 4x 35 GB = 140 GB > expired. Thus you tape holds 200 - 140 = 60 GB (30%) real-data. The rest > is gaps. Reclamation precess (which is hard, close to impossible, to do on > single drive) can help. > > Zlatko Krastev > IT Consultant > > > > > > > Sudheer Kumar <[EMAIL PROTECTED]> > Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> > 26.11.2002 14:22 > Please respond to "ADSM: Dist Stor Manager" > > > To: [EMAIL PROTECTED] > cc: > Subject: tape become full in 21 percent. > > > Hi > > I am using LTO 3580 tape drive. but my tape capacity is 100/200GB but > never got more than 31% utilization. When it reaches 25 to 31percent it > become Full.Can anybody tell me what could be the reason. > > Regards > > Sudhir
