-----Original Message----- From: Howard Jones [mailto:howard.jo...@network-i.net] Sent: 25 May 2009 14:58 To: firstname.lastname@example.org Subject: FreeBSD & Software RAID
Hi, Can anyone with experience of software RAID point me in the right direction please? I've used gmirror before with no trouble, but nothing fancier. I have a set of brand new 1TB drives, a Sil3124 SATA card and a FreeBSD 7.1-p4 system. I created a RAID 5 set with gvinum: drive d0 device /dev/ad4s1a drive d1 device /dev/ad6s1a drive d2 device /dev/ad8s1a drive d3 device /dev/ad10s1a volume jumbo plex org raid5 256k sd drive d0 sd drive d1 sd drive d2 sd drive d3 and it shows as up and happy. If I reboot, all the subdisks show as stale, and so the plex is down. It seems to be doing a rebuild, although it wasn't before, and would newfs, mount and accept data onto the new plex before the reboot. Is there any way to avoid having to wait while gvinum apparently calculates the parity on all those zeroes? Am I missing some step to 'liven up' the plex before the first reboot? (loader.conf has the correct line to load gvinum at boot) I tried again, with 'gvinum start jumbo' before rebooting, and that made no difference. Also is the configuration file format actually documented anywhere? I got that example from someone's blog, but the gvinum manpage doesn't mention the format at all! It *does* have a few pages dedicated to things that don't work, which was handy... :-) The handbook is still talking about ccd and vinum, and mostly covers the complications of booting of such a device. On the subject of documentation, I'm also assuming that this: S jumbo.p0.s2 State: I 1% D: d2 Size: 931 GB means it's 1% through initialising, because the states or the output of 'list' aren't described in the manual either. I'm was half-considering switching to ZFS, but the most positive thing I could find written about that (as implemented on FreeBSD) is that it "doesn't crash that much", so perhaps not. That was from a while ago though. Does anyone use software RAID5 (or RAIDZ) for data they care about? Cheers, Howie _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org" I have been running ZFS RAIDZ for 5 months on a 7.1 amd64 install, I have to say my experience has been mostly good. Initially I had an issue with a pci sata card causing drives to disconnect, but after investing a new motherboard with 6 sata ports everything has been smooth. I did have to replace a disk last week as it was showing checksum, read and write errors. ZFS rebuilt 2TB of data in around 5hours and did not loose any files at all. Regards Graeme _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"