I forgot to mention I use snapshots on both arrays. My bad. ---------------------------------- David Scharbach Mine Senior Electrical Engineer PCS Cory Division
On 2013-08-03, at 2:45 PM, Martin Frost <[email protected]> wrote: > David, your advice to back up data regularly is good, but rsync'ing > from one array to another is not the same as backing up. I don't know > how often you rsync, but right after you do, you can't restore a file > you accidentally deleted or clobbered yesterday. At most you have one > previous version of the dataset available. > > Although it doesn't sound like you do, maybe you use ZFS's snapshots > on one of these arrays. That can provide good backups that date > back over some amount of time, depending on available disk space for > retaining the snapshots. Ideally you would create snapshots on the > main array and use 'zfs send' to copy them to the backup array, or > at least create snapshots on the backup array before or after each > rsync from the main array. > > Martin > >> From: David Scharbach <[email protected]> >> Date: Sat, 03 Aug 2013 11:28:49 -0600 >> >> I use Raid-Z2 for my main array. 6 disks would give you effectively 4 disks >> usable with the ability to tolerate ANY 2 disk failures. Mirroring would >> allow for 3 disk failures ONLY if the failures were in different sets, if I >> understand mirroring correctly. There is a risk that the right 2 failures >> could cause the entire array to be pooched. >> >> Regardless, BACKUP you data regularly. Do not rely on your production to >> keep data safe. I have 2 arrays in my server, an 8 disk RaidZ2 and a 4 disk >> simple array. I was to lame to figure out replication so I fell back on an >> rsync script to ensure my data is in two places. In a perfect world, I >> would have it in 2 different physical boxes in different locations but >> anything of real value is also stored in the cloud (Wuala). >> >> Cheers, >> >> On 2013-08-02, at 9:08 PM, Harry Putnam <[email protected]> wrote: >> >>> Looking for a little advice about setting up a home lan server. >>> >>> So far just tinkering with a vbox oi as guest install hoping to make >>> whatever nasty blunders on disposable data and OS. >>> >>> But getting right to it: >>> >>> In a previous life I ran oi and used mirrored sets of discs for >>> everthing. >>> >>> Mirrored OS discs, and 2 sets of mirrored data discs. >>> >>> I was advised back then that mirrored sets of discs, given my small >>> usage, would be the most secure (not meaning agains penitration or the >>> like...just keeping data from loss) and handiest way to handle my home >>> lan. >>> >>> So, wondering what the current thinking is? Like say, mirrored as >>> opposed to a collection of discs in raidz or whatever its called. >>> >>> My needs will be well handled by something like 3tb of storage so >>> something like 6 1tb discs for a mirrored setup. >>> >>> What else could I get with those 6 disks in terms of redundancy and ease >>> of maintenance? >>> >>> >>> _______________________________________________ >>> OpenIndiana-discuss mailing list >>> [email protected] >>> http://openindiana.org/mailman/listinfo/openindiana-discuss >> >> >> _______________________________________________ >> OpenIndiana-discuss mailing list >> [email protected] >> http://openindiana.org/mailman/listinfo/openindiana-discuss > > _______________________________________________ > OpenIndiana-discuss mailing list > [email protected] > http://openindiana.org/mailman/listinfo/openindiana-discuss _______________________________________________ OpenIndiana-discuss mailing list [email protected] http://openindiana.org/mailman/listinfo/openindiana-discuss
