I've been fascinated by this thread. I'm in the planning stages of our Exchange 2010 environment (migrating from 2007), and saw some video sessions from TechEd which discussed the possibility of JBOD databases in a DAG, single item recovery turned on, circular logging turned on and no backups being necessary. This sounded fabulous to me, why shouldn't it work if you've got geographical distribution of the databases? It's just like RAID 5 written very large... However, I've been told this configuration significantly increases disk IOPs--please comment...
--Bernadette Gerber, Systems Administrator -----Original Message----- From: Michael B. Smith [mailto:mich...@smithcons.com] Sent: Thursday, September 29, 2011 9:25 AM To: MS-Exchange Admin Issues Subject: RE: Backup of Exchange 2010 To add-on to Missy's response - SingleItemRecovery enhances the capabilities of the dumpster and removes plausible deniability for item purges and changes. This allows Litigation Hold to be built on top of SingleItemRecovery, which was not possible with the original Dumpster. You may or may not be aware: with Dumpster 1.0, it's possible for a user to actually purge items from the dumpster and therefore claim they never received an item (plausible deniability of both the user and any "full control" accessor of the mailbox) and it's also possible for them to modify the original item they received, thus corrupting the content for potentially nefarious reasons (again, plausible deniability concerning the content of a message). With Dumpster 2.0, the user experience does not change, but the Discovery Admin has the capability of proving actions and accessing original content. As well as restoring the original content in the case of single mistakes... Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com -----Original Message----- From: Hurley, Leslie L CIV SPAWARSYSCEN-ATLANTIC, 58320 [mailto:leslie.hur...@navy.mil] Sent: Thursday, September 29, 2011 12:05 PM To: MS-Exchange Admin Issues Subject: RE: Backup of Exchange 2010 Michael, How does SingleItemRecovery effect the DAG? Or what we recovery from the DAG? I'm hearing from another MS person that it doesn't... LH* Leslie Hurley Systems Engineer SPAWAR Atlantic, Security+, Masters of Science CS-IA Fight Harder, Dig Deeper, Last Longer -----Original Message----- From: Michael B. Smith [mailto:mich...@smithcons.com] Sent: Wednesday, September 28, 2011 17:39 To: MS-Exchange Admin Issues Subject: RE: Backup of Exchange 2010 Really, what's the chance you are going to detect that before your backups expire? I'm giving a talk on this at Exchange Connections in Vegas at the end of October - please attend! (To Backup Or Not To Backup - That Is The Question! - that was my working title, they may have renamed it.) As long as SingleItemRecovery is enabled, your Deleted Item Retention and Deleted Mailbox Retention are set to reasonable (for your company) values, and you have a DAG copy in a "safe" location - the need for backups (other than making you feel "warm and fuzzy") is arguable. Dependent, of course, upon specific statutory needs not covered here. Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com -----Original Message----- From: Maglinger, Paul [mailto:pmaglin...@scvl.com] Sent: Wednesday, September 28, 2011 5:34 PM To: MS-Exchange Admin Issues Subject: RE: Backup of Exchange 2010 And to cover your butt in the unlikely event of a corrupt database. -----Original Message----- From: Joseph Heaton [mailto:jhea...@dfg.ca.gov] Sent: Wednesday, September 28, 2011 3:46 PM To: MS-Exchange Admin Issues Subject: Backup of Exchange 2010 If I have my mailbox servers setup in a DAG, is the only reason to backup to disk/tape to cover the "oops, where'd that message go?" issues? If you do backup to disk/tape, what type of retention do you have? And, yes, I know the retention issue is extremely subjective, depending on legal requirements, etc. Just curious. --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
