>Is this an example of what you call snapping? >http://www.samag.com/documents/s=1824/sam0201j/0201j.htm Yes, it sounds like the same thing. When you snap with and EMC SAN, you're not actually making a second copy of the volume. The SAN just makes the volume available to two different servers. Any changes to the volume are stored in cache, not actually done to the data. When the snap session is ended, any changes made from the production side are folded into the volume and any changes made to the snap\test side are thrown away. I don't know anything about Solaris or Veritas snapping, but I assume it's the same thing. They're both done with software and any changes are stored in cache.
>Are snaps the same thing as a scratch disk? I don't really know what a scratch disk is. The term rings a bell somewhere, but I couldn't tell you. >Where does one learn how to do volume sizing for growth/performance, >or does the SAN do it for you automagically in some ways? You gotta do it the old fashion way, lift and move. An EMC Clariion will not let you grow a volume. If you run out of space, you have to create a new, bigger volume and move the data yourself. I saw a demonstration of MTI's SAN product and they said they could make a volume grow, but they also said most operating systems wouldn't be able to see the increased size. What's the point then, I have no idea. >How does this better advantage of disk space' work, exactly? You can create a RAID X, chop it up into multiple volumes and then give those volumes to multiple servers. >What do networks have to do with this? Try not to think of it as an ip network, think of it as a storage network. Instead of having ip devices on either side, you connect disks to servers. On an ip network, a workstation connects to an email server. On a storage network a server connects to disk space. It's networking in a basic sense - something connected to something else. That connection goes through a switch, just like a connection from a workstation passes through a switch to see an email server. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=56897&t=56857 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
