Thnks for that :) David
> ---------- > From: William Lefkovics[SMTP:[EMAIL PROTECTED] > Reply To: Exchange Discussions > Sent: 18 June 2003 11:19 > To: Exchange Discussions > Subject: RE: Brick level backups > > I probably should reread this, but this was my answer to this question > A year ago - plus an added point. > > Why not to do Brick Level Backups: > > 1) They take a loooong time. At my last position, the priv.edb on > several Exchange servers was huge with several mailboxes exceeding > 2GB. Backup windows of 'July' is not acceptible nor necessary. > > 2) Brick Level break SIS in the process. At a previous employer we > had an SIS ratio of 4 (lots of little daily cash spreadsheets and the > like getting sent to DL's). This means that a BLB backup uses as much > as 4 times the total tape. Now I need an autoloader to take care of > the boxes of tapes required each night. > > 3) You can't perform a full server restore to point of failure with > brick level backups. You have to actually perform additional full > online backups as well to allow for full disaster recovery. More > tapes. More time. More money. > > 4) A restore of several mailboxes from BLB's will cause the store to > grow because of no SIS. If my SIS ratio is 2 and some disaster leaves > me with only brick-level, my restore will double the size of the priv. > > 5) The redundant backups for brick level lower the overall performance > of your exchange server as backups compete with users for CPU cycles > and disk reads. It is also additional and unnecessary wear and tear > on tape drives. > > 6) Brick Level Backups do not backup items in deleted item retention. > As my users (for email anyway) have always been of the educated > variety, they know and use deleted item recovery as needed. > > 7) A restore of a mailbox is seldom needed. (Probably the only > instance is inadvertant deletion by an administrator in Exchange5.5) > With deleted item retention set to a reasonable 30 days or so, and > with deleted mailboxes retained in Exchange2000, brick level backups > fall in the category of a waste of time and resources. > > 8) Backups should not be a helpdesk support option. They are a > disaster recovery requirement. With all that tape and time, the > convenience of having someone restore my mailbox is so simple I can be > more careless with my email. I can always get my info restored. The > Potential for user complacency because we can always restore uses > Valuable IT time and resources. > > 9) Yes, it's true. For me, I have only done this using ArcServeIT. > Because of comments here in this and other forums, CA took the > Exchange agent back to the lab and did some more fixing on it. For me > it was too little too late. Basically, BLB's are not perfect. Data > is not perfectly recreated through the restore process. Problems > included header info missing, digitally signed emails corrupt, > attachments missing. > > 10) Many, many more reputable and experienced people have shared their > horror stories over and over in this and other forums and newsgroups. > So much so that I was relieved to learn in 1998 that it wasn't just me > that felt this way. The people that have expressed this opinion I > hold in high regard and certainly owe it to myself to try to > understand why the concensus is for or against something. > > 11) Microsoft provides the utility ExMerge which can be used to backup > a single mailbox to .pst if necessary. I use this as the last step > before deleting a users mailbox after (s)he have left the company. It > is a simplified, granular alternative for certain circumstances. > > 12) Exchange2003 allows for a disaster recovery storage group to allow > Production restores without a recovery server. > > The above may not all apply to you. > > Would you like to see the list against the use of 'confidentiality > disclaimers'? > > William > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of David Lloyd > Sent: Wednesday, June 18, 2003 2:58 AM > To: Exchange Discussions > > Hi guys, > I just wanted to know why are brick level backups a bad idea. I know why > pst > files are. > I can only imagine is that they take forever to complete, and not always > all > of them. > > Sorry if this has been discussed before but i do need some reasoning for > my > bosses. > > I know Ed hate em > > > Thnks > > David > > > CONFIDENTIAL NOTICE > This communication contains useless information which is confidential and > may also be naughty. 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