Bryan J. Smith wrote: >"William A. Mahaffey III" <wam at HiWAAY.net> wrote: > > >>19 GiB in 36 minutes, I wouldn't be complaining either :-). >> >> > >It's not bad at all. > > > >>I'm using DDS-2 & 3, & they are MUCHO slower .... >> >> > >As I mentioned, DDS-2 is 15 years old and a measly 0.8MBps >native. DDS-3 is about 10 years old and about 1.6MBps. > >Tape is one of those commodities that really require a >minimum of a $1K investment with something like VXA. And if >you really can, it's best to spend $3-4K and go for the gold >in something like LTO-3 with its 400GB native capacity and >80MBps transfer rate (double each with hardware compression). > >Anything less really isn't worth it. Especially not at the >cost of backup cartridges. > > > >>I do also backup across my network to a sorta-spare HDD on >>another box, but use the DAT tapes for remote storage. >> >> > >Which is what many organization should do. They should >guarantee they get some sort of daily backup, which is >easiest to do with disk. Especailly when just doing >sychronization of diffs, which drastically cuts down on >network usage -- especially during the all important "backup >window." > >It's also easier to restore, easier to do just about >everything when you have a full copy on random access disk. >It is also easier to backup tape, directly, locally and 24x7 >-- no more backup window constraints -- from that server. >It's also easier to verify backups against original, when the >backup server has a local copy -- again, at any time, 24x7, >not bothering the network. > >When I integrated any solution, I always told the client to >put in 4x the disk they needed, then another 2.5x that size >(for a total of 14x) for snapshots, disk backup, etc... >Ideally this is a separate system, but in the worst case, it >was just a separate array. If you're spending $4K on a >server with such storage, then another $1K on basic tape >backup is well worth it. > > > >>I might need to look into a firewire/USB disk for that >>at those speeds :-). >> >> > >FireWire is pretty commodity these days on at least AMD >platforms. I've had far less headaches with it, as long as >I'm not running "on-line" data with it. I never do it with >FireWire _or_ USB for that matter. > >If I need something "on-line," I still use external SCSI LVD. > SAS will become my preferred favorite soon enough. > > I'm thinking about adding a DDS4 DAT drive to the box that I am currently using for LAN daily backups, kinda like you suggest. Now I have a menagerie of boxen backing themselves up & in some cases LAN-backing and/or taping others. Quite the hodge-podge solution, but reliable enough .... My backup window is ~12:00 A.M. for the major LAN backup, usually done in < 2 hours, then 4:45 A.M. to LAN-back my Win2K box onto an SGI Octane (w/ DDS3 drive), then ~6:00 A.M. to whenever-it's-done for various tapes, usually once a week, so usually no sweat there. This is a private-LAN only, not servers. -- William A. Mahaffey III --------------------------------------------------------------------- Remember, ignorance is bliss, but willful ignorance is LIBERALISM !!!! -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20051205/54626268/attachment-0005.html>