Chantal wrote:
That was my argument as well. How to do offsite backups. My classmate mentioned the possibility of a remote SAN for companies that already have the infrastructure and bandwidth available to them. I'm really not sure how feasible that is though.
It is totally feasible. There are companies that have remote DASD/SAN's and they really don't do backups, they do PPRC or XRC. So that the local can and the remote DISK/SAN are always in sycn.
Guess where the remote DASD/SAN are located? At their DR site. The DR test involves "breaking" the copy connection, IPL'ing off the DASD/SAN at DR and they are up and running. I heard that on site that does this for one of their DR tests they were up and fully running in about 15-30 minutes.
Some companies will do flash copy to DASD/SAN at a remote site and they do tape backup on the DASD/SAN at the remote site. This way they have
The other issue with DASD/SAN only backups, is how much DASD/SAN do you need if you want to be able to restore a file from two days ago, a week ago, a month ago, a year ago.
However to do this, you must have a real good reason to mirror you DISK/SAN offsite.
What some sites do is backup to DASD locally to reduce system/application outage time and then backup the DASD backup to tape and send the tape offsite. Currently we have a two hour hard window where all of our applications must be out of service. We are going to start doing the DASD to DASD and then to TAPE thing and hopefully get down to just a few minutes.
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