* Edward Ned Harvey (solar...@nedharvey.com) wrote: > > From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > > boun...@opensolaris.org] On Behalf Of Matt Keenan > > > > Just wondering whether mirroring a USB drive with main laptop disk for > > backup purposes is recommended or not. > > > > Plan would be to connect the USB drive, once or twice a week, let it > > resilver, and then disconnect again. Connecting USB drive 24/7 would > > AFAIK have performance issues for the Laptop. > > MMmmm... If it works, sounds good. But I don't think it'll work as > expected, for a number of reasons, outlined below.
It used to work for James Gosling. http://blogs.sun.com/jag/entry/solaris_and_os_x [snip] > > This would have the added benefit of the USB drive being bootable. > > By default, AFAIK, that's not correct. When you mirror rpool to > another device, by default the 2nd device is not bootable, because > it's just got an rpool in there. No boot loader. That's true, but easily fixed (just like for any other mirrored pool configuration). installgrub -m /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/{disk} > Even if you do this mirror idea, which I believe will be slower and > less reliable than "zfs send | zfs receive" you still haven't gained > anything as compared to the "zfs send | zfs receive" procedure, which > is known to work reliable with optimal performance. How about ease-of-use, all you have to do is plug in the usb disk and zfs will 'do the right thing'. You don't have to remember to run zfs send | zfs receive, or bother with figuring out what to send/recv etc etc etc. Cheers, -- Glenn _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
