There are some other faster restore solutions out there. With Virtual Tape Libraries you get all the speed and reliability of D2D but with all the functionality of tape. For example, I happen to work for a company that provides a VTL solution which is certified by IBM-TSM. There is no way to run reclamation on D2D so that must be done once it is transferred to real tape. With a VTL solution, you backup to a virtual tape library and device, run the reclamation on that, which is nearly instantaneous and then copy to real tape via archive and that saves you hrs and hrs of reclamation time. The other benefit is the near unlimited amount of mount points. With backups and restores, the speed of real tape and libraries are not longer your bottleneck.
-----Original Message----- From: MC Matt Cooper (2838) [mailto:[EMAIL PROTECTED] Sent: Friday, July 23, 2004 11:44 AM To: [EMAIL PROTECTED] Subject: Re: D2D vs. tape backups with TSM? There is a 1 hour webinar on this subject Monday 07/26. I haven't seen it but I have signed up for it. I see an avalanche of vendor offerings lately. I hope this can straighten out things a little. Matt Topic: Disk Only Backup Strategies This presentation will examine some possible disk only configurations and explore the pros and cons of using this new strategy. Support Technical Exchange Expand your Tivoli product knowledge by participating in Support Technical Exchange. Sign up today! http://www-3.ibm.com/software/sysmgmt/products/support/supp_tech_exch.ht ml -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Alexander Lazarevich Sent: Wednesday, July 21, 2004 5:52 PM To: [EMAIL PROTECTED] Subject: D2D vs. tape backups with TSM? TSM 5.1.6.5 on 2K server. Current library is Overland Neo 4100 LTO-2. We need more capacity in our backups, and I'm looking at faster restore altenatives. Has anyone here used the Overland Reo 400x series, or anything similar? It's basically SATA drives enclosed and RAID'd. And you can configure it into LV's that emulate LTO-2 tapes. Does any TSM'er use disk based backup? Right now the cost seems to be twice as much as LTO-2 based. I can get a 12TB LTO-2 library for about 35K (Overland NEo 4100), yet the same capacity with disk (Reo 4000) is about 70K. I can also buy a DAS RAID system with 4TB capacity for about 10K (Excel Meridian). What is so special about a D2D disk backup system that makes it twice as expensive as the DAS and tape backup? But I'd prefer not to attach a DAS to the TSM server, because I definately want the virtual-LTO-2 functionaility, which I *think* is part of the Reo 4000 device, right? I mean, TSM doesn't do that does it? That must be a functionality of the D2D device, right? Thanks, Alex
