Stephen, I have to agree with you.
I lost (just) two LTO tapes due to their being jammed in a drive. Those two tapes held 1/3 million files totalling 180 GB. All of that would have been lost (by our advertising department) if I hadn't had copypool tapes. Yes, providing that functionality required a $40,000 DLT library, and operationally it took 12-18 hours to restore the contents of each tape. But in the end I had everything restored and hadn't lost a single file. And that was without DRM, just ensuring that I had copies of my data that lived on the primary tapes, and that the copies made it to our vault. Our entire system manages about 600 tapes, so "semi-manual" methods are practical. Tab Trepagnier TSM Administrator Laitram Corporation Stephen Pole <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 04/30/2002 09:20:06 AM Please respond to [EMAIL PROTECTED] Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Re: Recovering from a disaster .... Hello, After working in a 365 x 24 operation for more than 5 years, and being obligated to ensure as "safe and possible" environment for data. Then you really have no choice by to copy each storage pool. Come up with a disaster recovery plan, and put this into action! I happen to believe it is worth the cost, at least in my business which is Oil and gas exploration. Big, expensive data sets that would cost 10's of millions to replace. Also, place a price on delayed delivery of data, what price do you (or the bean counters place on that?) The cost of lost opportunity. Here is my model .. We go from Disk Pool to - Tape Pool - then copy this to Offsite pool, then get tapes off site as soon as practical. No big deal.... Initially costs increase, but we have more than recovered the costs of 3590's by having a DISASTER PLAN IN OPERATION. If a tape gets wrecked in a tape drive (It does happen), or the media fails (this happens as well), then at least you can recover the data you've just lost. I know tape manufactures guarantee the tape. But only for the tape, not the data thereon. It goes without saying your consumables are going to increase, but that is a small price to pay for a pretty valuable asset, namely your data. Your costs can be managed by setting expiration etc........ I can honestly say, my butt has been saved many times by having using DRM. Once set up properly, it runs, and runs. Setting up is no big deal. Thinking about it is, but not acting is suicide. What price do you place on data? How much to replace? How much is a lots opportunity going to cost??? I guess it depends on how much went into collecting it and much the company sees lost opportunities.. Put a price on that, and there is its true worth. Ponder for a while... Cheers :) Regards Stephen. Stephen Pole Geophysicist - Data Management Specialist 61 Delonix Circle Woodvale WA 6026 Austalia Office Phone +61 8 9409 3014 Home Phone +61 8 9409 3012 Mobile Phone +61 4 2121 0157 Time Zone : WAST - GMT + 08:00 hours -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of Cook, Dwight E Sent: Tuesday, 30 April 2002 8:49 PM To: [EMAIL PROTECTED] Subject: Re: Recovering from a disaster .... OK, I've been working with TSM (ADSM) for about 6 years now and you can call me cheap but I never (personally) though DRM was worth the money. We do operate in a unique environment here so I shouldn't say that DRM has no place in the market, it is just that I was doing DRM before DRM came out and once it did I couldn't justify the cost just to replace all that I had done over the years. We don't really run with copy storage pools... our TSM servers are located offsite to the production boxes that they backup so backups are effectively "offsite" as soon as they are created. We also deal with so much data across our 10 TSM servers on a daily basis that we would have to make them 20 if we were to copy all the data on a daily basis, and that just isn't going to happen. Now what sort of disaster am I protecting against ? Total loss of environment due to hardware failure. Not really counting fire, flood, water, etc... If my actual server goes dead, AS LONG AS I HAVE MY ATL, well at least the tapes, I'm OK. So to answer your question, almost yes. You need your db backup (from tape, disk, somewhere), you need definitions of your data base & log files (I always allocate them the same size as they were), the device configuration file is nice (just about necessary). With that info you can get back your environment as long as you have your tapes. Dwight E. Cook Software Application Engineer III Science Applications International Corporation 509 S. Boston Ave. Suit 220 Tulsa, Oklahoma 74103-4606 Office (918) 732-7109 -----Original Message----- From: Sandra Ghaoui [mailto:[EMAIL PROTECTED]] Sent: Tuesday, April 30, 2002 5:43 AM To: [EMAIL PROTECTED] Subject: Recovering from a disaster .... Hello everybody, I have one more question ... is it possible to recover from a disaster just by having the TSM database backup and our data backup on tapes? I've been reading about the Disaster Recovery Manager and if I got it right, I would need to have copy storage pools to recover from disaster? thx for helping ... Sandra __________________________________________________ Do You Yahoo!? Yahoo! Health - your guide to health and wellness http://health.yahoo.com
