You have to use the "view recordings" on the left hand side of the page.
In short, many GB are not copied. VSS essentially makes "snapshots" of the disk at periodic intervals. Whenever the OS needs to write to a block that has been snapshot (snapshooted? snapped?), it instead copies the data to a new block which becomes the "live" block and modifies this new block. The old block is retained and associated with the current snapshot. I don't know much about the MS implementation, but I wouldn't understand why it would take more than a few seconds to build a virtual disk pointing to the blocks that make up a particular snapshot. The webcast seemed to indicate this happened within a few seconds - at least that was the impression I got. I would assume most of the performance degredation comes from the fact that after a snapshot, any writes involving snapped blocks must first copy the block to a new block. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ajay Kulsh Sent: Thursday, June 24, 2004 2:32 PM To: Exchange Discussions Subject: Re: Shadow Copying of Exchange 2003 Ken, I get the error message "Sorry this meeting has already finished". -- And, about one of my original questions, how can the huge exchange database of many GBs be copied in "about a minute" and where it is written to? So far, only Samantha's response makes sense unless one of you have actually used this feature and can give some inside info. Jay ----- Original Message ----- From: Ken Cornetet To: Exchange Discussions Sent: Thursday, June 24, 2004 8:31 AM Subject: RE: Shadow Copying of Exchange 2003 You all may want to view this webcast: Go to: http://www.placeware.com/cc/mseventsbmo/join Your Name: (enter your name) Meeting ID: 1032251381 Meeting Password: webcast -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bridges, Samantha Sent: Thursday, June 24, 2004 9:57 AM To: Exchange Discussions Subject: RE: Shadow Copying of Exchange 2003 I understand that you cannot or should not think of Shadow copying the Exchange IS. The shadow copying feature in Windows 2003 is for the OS not for a database. To be clearer, you can use shadow copy for Windows or the OS not for the Exchange database. Hope this makes sense. We were in the same thought pattern as you and learned this wasn't going to work. Samantha -----Original Message----- From: Ajay Kulsh [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 23, 2004 8:42 PM To: Exchange Discussions Subject: Shadow Copying of Exchange 2003 I need some enlightenment regarding Shadow Copying of Exchange 2003. I have read MS article - 822896 and some other references to understand shadow copying. What is not clear to me that if it takes typically only *about a minute* to create a shadow copy, how long does it normally take to write this data to a backup hardware? And while backup program is writing this, where is data kept? Memory cannot keep so much and I don't see any hard drive space requirements mentioned. Can shadow copying of Exchange 2003 only work with backup like SAN, not normal tape drive? Jay Kulsh _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&; lang=english To unsubscribe send a blank email to %%email.unsub%% Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. 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