No, I backup to disk, and then to tape (RDX, in truth) and then offsite. So I understand the paranoia. However, my point was, that if you're relying on the extended window of moving disk to tape, and the disk backup doesn't happen for some reason, your tape backup will be missing the previous backup...
On Sat, Feb 5, 2011 at 8:43 AM, Ray <rz...@qwest.net> wrote: > It’s all about your level of paranoia. Our building, for example, has > had 2 roof collapses in 5 years. The 2nd one took out the sprinkler > system, which flooded the building. A lot of equipment didn’t survive. > > > > I can’t take my disks offsite. Tape isn’t going away anytime soon. > > > > *From:* Jonathan Link [mailto:jonathan.l...@gmail.com] > *Sent:* Friday, February 04, 2011 1:09 PM > > *To:* NT System Admin Issues > *Subject:* Re: Dedupe Thoughts? > > > > There's a flaw in your parenthetical observation. If the disk fails in a > d2d backup, and the tape is backing up from the backup disk, then the tape > is worthless as far as a secondary backup. > > > > > On Fri, Feb 4, 2011 at 2:59 PM, Paul Hutchings <paul.hutchi...@mira.co.uk> > wrote: > > Fair point on the flexibility, it just seemed a little costly for a "poor > mans" solution. > > My own personal opinion, stick with an aux copy on tape for that warm fuzzy > feeling when you're standing in the burning embers and need to know you've > access to a good backup (or when the disks fail or you mess up) - once the > d2d backup is done your backup window doesn't matter so you can take as long > as you like to do the aux copy to tape. > > Do check out how BE does dedupe and synthetic full backups - one of the big > selling points of D2D and dedupe is this "incremental forever" business > where you take your initial known, good, full backup, and from that point > onwards you only ever take incrementals and let the backup software > construct fulls from your initial full, plus the incrementals. > > > -----Original Message----- > From: Roger Wright [mailto:rhw...@gmail.com] > > Sent: 04 February 2011 19:53 > To: NT System Admin Issues > > Subject: Re: Dedupe Thoughts? > > Yep, definitely would want to exit the tape scene as soon as possible. > I was really looking at the Synology for the flexibility of either eSATA > or NAS connectivity. There may be even more cost-effective solutions, but > we've had great luck so far with the one Synology NAS we purchased. > > > Roger Wright > ___ > > "The internet is a great way to get on the net." - Bob Dole > > > > > On Fri, Feb 4, 2011 at 2:27 PM, Paul Hutchings <paul.hutchi...@mira.co.uk> > wrote: > > How come you're looking at NAS rather than just shovelling a few 2tb > > drives in your backup server? > > > > I'm looking into doing something very similar myself (we use > > Commvault/Simpana) and the rule of thumb on disk space, assuming > > you're not paying per Tb stored, is disk is cheap, and with dedupe > > rates what they are for average data, you'd be mad not to shovel in as > > much as you can afford and leave tape as the very last resort. > > > > -----Original Message----- > > From: Roger Wright [mailto:rhw...@gmail.com] > > Sent: 04 February 2011 18:08 > > To: NT System Admin Issues > > Subject: Dedupe Thoughts? > > > > I'm looking at some options for a "poor man's" deduplication system > > for backups. A Data Domain or Exagrid solution would be preferred but > > not feasible at this time. > > > > We're currently backing up a little over 4 TB to LTO3 tape and have > > outgrown our backup window, library capacity, and RTO. > > > > I'm thinking of using BE 2010's Deduplication option for the engine > > and something like the Synology DS1511+ with 5 - 2GB drives for 8 TB > > of storage (w/RAID5 or just a hot spare). Then I could offload to > > tape for off-site storage or script replication to another unit at a > > branch office. > > > > Any best practices thoughts for sizing the storage for the deduped data? > > Does it just depend on the ratio achieved and the storage and the > > number of backup sets retained? One nice thing about the Synology > > system is it can be easily expanded to up to 15 disks. > > > > A Data Domain or Exagrid solution would be preferred but not feasible > > at this time. > > > > > > Roger Wright > > ___ > > > > "The internet is a great way to get on the net." - Bob Dole > > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ > > <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > > > --- > > 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 ntsysadmin > > > > > > -- > > MIRA Ltd > > > > Watling Street, Nuneaton, Warwickshire, CV10 0TU, England Registered > > in England and Wales No. 402570 VAT Registration GB 100 1464 84 > > > > The contents of this e-mail are confidential and are solely for the use > of the intended recipient. 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