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Hard Drive backup
I am replacing 2 machines
1 - OpenBSD (single drive) Webserver, SMTP Gateway, Dhcp Server 1 - linux (currently has a hardware RAID) card Email server for 10 users with 1 - OpenBSD box, with 2 disks to do the same task. I know that OpenBSD does not support "Root on Raid" as of yet. My question What is the best way to "mirror" the primary disk so that in case of disk failure I can just move the second disk to the primary and then use it ? This would be a manual process , not looking for any automatic fail over I have considered just loading the OS on each disk then putting the second on as a slave disk and then just rsyncing the changes over to it.. Thoughts.. ???
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Two additional notes:
1 -- I did not mention softraid(4), as it is not quite ready for production, since there is no recovery method for components of a RAID set. The admin must back up, rebuild, and restore, which will usually introduce significant downtime. Though it, like RAIDframe, cannot boot from a RAID set but can easily have root on RAID. 2 -- There are other replication technologies, but those are more commonly used over a network, not from one drive to another. One example is rsync. These remote replication technoligies will introduce data loss, which must be managed, and specific implications for data loss management will be unique to each application environment. |
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jggimi... Thank you for the reply..
I have read much about raidframe and even tried it back in the 3.3 days.. but never got it to work.. Also, did know about softraid that was yet supported on i36 yet.. I should have clarified that the hardware card in the Linux box is a 3Ware which Theo hasn't much respect for , 3ware uses the twe(4) driver and the card I have is supported by that driver. Funny, I actually sent Theo a message (and he responded) about LSI providing source code for the 3ware/AMCC cards and would the OpenBSD devs update the twe(4) driver. Theo's response was "... If they approach us ..." Also , I use rsync to mirror all my websites to each other which does provide backup /redundancy, all boxes are at different locations.. I may go ahead and use the RAID card and then do my backups via rysnc script since I already have that structure in place.. Thank you for the info regarding bioctl(8)... Was just curious about what others were using.. rk
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