> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Eric Andersen > > I backup my pool to 2 external 2TB drives that are simply striped using > zfs send/receive followed by a scrub. As of right now, I only have > 1.58TB of actual data. ZFS send over USB2.0 capped out at 27MB/s. The > scrub for 1.5TB of backup data on the USB drives took roughly 14 hours. > As needed, I'll destroy the backup pool and add more drives as needed. > I looked at a lot of different options for external backup, and decided > to go with cheap (USB).
I am doing something very similar. I backup to external USB's, which I leave connected to the server for obviously days at a time ... zfs send followed by scrub. You might want to consider eSATA instead of USB. Just a suggestion. You should be able to go about 4x-6x faster than 27MB/s. I have found external enclosures to be unreliable. For whatever reason, they commonly just flake out, and have to be power cycled. This is unfortunately disastrous to solaris/opensolaris. The machine crashes, you have to power cycle, boot up in failsafe mode, import the pool(s) and then reboot once normal. I am wondering, how long have you been doing what you're doing? Do you leave your drives connected all the time? Have you seen similar reliability issues? What external hardware are you using? I started doing this on one system (via eSATA) about a year ago. It worked flawlessly for about 4 months before the disk started crashing. I started doing it on another system (via USB) about 6 months ago. It just started crashing a couple of weeks ago. I am now in the market to try and identify any *well made* external enclosures. The best I've seen so far is the Dell RD1000, but we're talking crazy overpriced, and hard drives that are too small to be useful to me. > If we still are capped out at 2TB as the limit for a physical > device in 2 years, I solemnly pledge now that I will drink a six-pack > of beer in his name. I solemnly pledge to do it anyway. And why wait? ;-) _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
