David, Our policy has been to use J tapes only for collocated pools, K for non-collocated. This maximizes the larger tapes and reduces the number of offsite tapes we have to manage. The downside to the bigger tapes, especially with copy pools, is that reclaiming them becomes very difficult as the number of nodes increases (reclaiming 1 copy pool tape could mean having to mount as many primary tapes as you have nodes).
Steve Schaub Systems Engineer, Operations & Storage Haworth, Inc 616-393-1457 (desk) 616-886-8821 (cell) [EMAIL PROTECTED] -----Original Message----- From: David E Ehresman [mailto:[EMAIL PROTECTED] Sent: Monday, February 23, 2004 10:30 AM To: [EMAIL PROTECTED] Subject: J vs K 3590 Tapes We are backing up to 3590 tapes. We currently use K (extended length) tapes for onsite tape storage pool and J (standard length) tapes for offsite copy storage pool. We will soon start replacing some of our older J tapes and are trying to decide whether to replace them with Js or Ks. Has anyone weighed the pros and cons of using Js vs Ks for offsite tapes. Which did you decide on and why? David Ehresman University of Louisville
