Radoslaw, I think the point is that for shops that use in system copies (Shadowimage, Flashcopy, Timefinder, etc) the time it takes to do the backup has nothing to do with the speed of tape.
All of vendors offer instant copy capabilities that can be completed easily in less than a minute, no matter if you copy a GB or a TB. Once that is done you have your backup. The tape drive is only creating an archive of the backup, and is not in the critical path. Faster tape drives are really so important for backups in this case. Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On > Behalf Of R.S. > Sent: Saturday, 18 February 2006 7:18 PM > To: [email protected] > Subject: Re: Disk vs Tape scenario > > Bruno Sugliani wrote: > > On Fri, 17 Feb 2006 21:51:51 +0100, R.S. > <[EMAIL PROTECTED]> wrote: > > > > > >>Looks very promising. > >> > > > > Yes .. on the other hand when we look at DASD manufacturers numbers .. > you > > wonder why some of us are looking for larger time frame for backup ... > > the numbers say that we need few minutes to save few teras > > Ok it is friday :-)) > > IMHO it's quite obvious: 10 years ago you had 10GB cart and you needed, > let's say 3 hours to backup your 0.x TB DASD. Today you have 500GB cart > and ...still need 3 hours, because your DASD also grew up. Did your > business grew as the storage ? I strongly doubt. > This is the same like in popular (in Poland) IT anecdote: in 1986 our > secretary needed PC XT and 640kB RAM to print one page document. After > many years she has Pentium 4, 1GB RAM, 100+ GB disk and she ...still use > it is typing machine. > (translation is not exact, but the idea is obvious) > > -- > Radoslaw Skorupka > Lodz, Poland > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
