Thirded. The other benefit is the lower costs. A BCV volume for EMC is essentially a mirror of your existing set of spindles (which are probably mirrored). The DB is shut down and the mirror is broken and mounted elsewhere for backup to tape. In order to remount that mirror for the next day, you'll need to shut down the DB again. You can create a fourth mirror to mount as you are breaking the first one. That's 4 sets of spindles to handle the disk needs. That can get really expensive and you'll still need to verify the integrity of the DB before you back it up to tape.
Backing it up to disk can take fewer disks as you are generally more concerned with volume size rather than spindle I/O's. -----Original Message----- From: Ed Crowley [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 18, 2002 11:56 PM To: Exchange Discussions Subject: RE: More OT: Hitachi SAN Doing that also interrupts any users who are logged on. I agree about backing up to disk and snapping the backup file. Ed Crowley MCSE+I MVP Technical Consultant hp Services "There are seldom good technological solutions to behavioral problems." -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Roger Seielstad Sent: Wednesday, December 18, 2002 5:03 AM To: Exchange Discussions Subject: RE: More OT: Hitachi SAN script that shuts down the db does the snapshot and then > restarts the db > all done in less than a minute. Yo I don't know about you, but shutting down my Exchange databases takes significantly longer than a minute. Granted, they're still predominantly Ex5.5, but its not a one minute process. Might be if I did it daily, but I can't, since we run 24x7. Personally, I still think the best way to do it is to use a backup to disk option and rip that to tape, or use an agent based backup. ------------------------------------------------------ Roger D. Seielstad - MCSE Sr. Systems Administrator Inovis - Formerly Harbinger and Extricity Atlanta, GA > -----Original Message----- > From: Andy Haigh [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, December 18, 2002 1:21 AM > To: Exchange Discussions > Subject: RE: More OT: Hitachi SAN > > > It's only if you are taking snapshots of running db's that you have > the problems. OK I know there are a number of sites out there who will > not allow even a minute of the air but the majority of us can live > with a script that shuts down the db does the snapshot and then > restarts the db > all done in less than a minute. You can then kick off your > backup which > backs the snapshot up to tape. I have seen this form of > snapshotting on > EMC and NetApps and it works very well. I have also seen Oracle > databases recovered from snapshots successfully. > > Listening to MS they have added support for snapshots in Windows.NET > and they are also saying that there will be snapshotting available on > the next version of Exchange, but lets wait and see. The snapshots in > .NET is more of a complete copy followed by delta's for each > subsequent snapshot. > > EMC and NetApps use technology that provides instant snapshots as all > it does it take a snapshot of the block allocation table and only if a > block is about to change does it create a second block to > keep a copy of > the block as at the time of the snapshot. This obviously > saves on space > but if you have a mutliple disk failure does mean you could > lose all of > the data for that snapshot, though in one of these modern SAN's with > multiple spare drives is very unlikely. > > -----Original Message----- > From: Hansen, Eric [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, 18 December 2002 1:39 AM > To: Exchange Discussions > Subject: RE: More OT: Hitachi SAN > > > If you cant restore it, whats the point? > > Is it safe to assume the same with a SQL or Oracle db as well? What > about a AD global directory? > > I'm getting the impression that its good for file systems and file > servers and not much more. > > e- > > -----Original Message----- > From: Ed Crowley [mailto:[EMAIL PROTECTED]] > Sent: Monday, December 16, 2002 11:03 PM > To: Exchange Discussions > Subject: RE: More OT: Hitachi SAN > > You might be able to restore one if you're lucky. > > Ed Crowley MCSE+I MVP > Technical Consultant > hp Services > "There are seldom good technological solutions to > behavioral problems." > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] On Behalf > Of Roger Seielstad > Sent: Monday, December 16, 2002 5:21 AM > To: Exchange Discussions > Subject: RE: More OT: Hitachi SAN > > > You can take snapshot backups of the database. You > can't restore them, but you can take them. > > Roger > ------------------------------------------------------ > Roger D. Seielstad - MCSE > Sr. Systems Administrator > Inovis - Formerly Harbinger and Extricity > Atlanta, GA > > > > -----Original Message----- > > From: Ed Crowley [mailto:[EMAIL PROTECTED]] > > Sent: Friday, December 13, 2002 5:31 PM > > To: Exchange Discussions > > Subject: RE: More OT: Hitachi SAN > > > > > > I've seen Exchange 2000 run on servers that use a > Hitachi SAN. There > > really shouldn't be any problem running Exchange on > any high-quality > > SAN system. Don't believe the hyperbole, however, > that you can take > > snapshot backups of the Exchange databases. > > > > Ed Crowley MCSE+Internet MVP kcCC+I > > Tech Consultant > > hp Services > > Protecting the world from PSTs and Bricked Backups! > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED]] On > Behalf Of Hansen, Eric > > Sent: Friday, December 13, 2002 6:39 AM > > To: Exchange Discussions > > Subject: More OT: Hitachi SAN > > > > > > 2nd verse, same as the first... :p > > > > > > Anyone running a Hitachi 9900 V Series SAN? Or > maybe just the 9900 > > series? > > > > > > > > Normally I wouldn't ask such things of an exchange > group, but the > > diversity and technical expertise here is very good. > > > > e- > > > > > _________________________________________________________________ > > List posting FAQ: > http://www.swinc.com/resource/exch_faq.htm > > Archives: > http://www.swynk.com/sitesearch/search.asp > > To unsubscribe: > mailto:[EMAIL PROTECTED] > > Exchange List admin: [EMAIL PROTECTED] > > > > > > > _________________________________________________________________ > > List posting FAQ: > http://www.swinc.com/resource/exch_faq.htm > > Archives: > http://www.swynk.com/sitesearch/search.asp > > To unsubscribe: > mailto:[EMAIL PROTECTED] > > Exchange List admin: [EMAIL PROTECTED] > > > > _________________________________________________________________ > List posting FAQ: > http://www.swinc.com/resource/exch_faq.htm > Archives: > http://www.swynk.com/sitesearch/search.asp > To unsubscribe: > mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > > > __________________________________________________ > Do you Yahoo!? > Yahoo! Mail Plus - Powerful. Affordable. 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