> - How can I effect OCE with ZFS? The traditional > 'back up all the data somewhere, add a drive, > re-establish the file system/pools/whatever, then > copy the data back' is not going to work because > there will be nowhere to temporarily 'put' the > data.
Add devices to the pool. Preferably in mirrors or raidz configurations. If you just add bare devices to the pool you are running RAID-0, no redundancy. You cannot add devices to a raidz, as mentioned. But you can add more raidz or mirror devices. You can also replace devices with larger ones. It would be nice to be able to add more devices to a raidz for home users like us, maybe we'll see it someday. For now, the capabilities we do have make it reasonable to deal with. > - Concordantly, Is ZFS affected by a RAID card > that supports OCE? Or is this to no advantage? Don't bother. Spend the money on more RAM, and drives. :) Do get a nice controller though. Supermicro makes a few nice units. I'm using 2 AOC-USAS-L8i cards. They work great, though you do have to mod the mounting bracket to get them to work in a standard case. These are based on LSI cards, I just found them cheaper than the same LSI branded card. Avoid the cheap $20 4-port jobs. I've had a couple of them die already. Thankfully, I didn't lose any data... I think... no ZFS on that box. > - RAID5/6 with ZFS: As I understand it, ZFS with > raidz will provide the data/drive redundancy I seek > [home network, with maybe two simultaneous users on > at least a p...@1ghz/1Gb RAM storage server] so > obtaining a RAID controller card is > unnecessary/unhelpful. Yes? Correct. Though I would increase the RAM personally, it's so cheap these days. My home fileserver has 8GB of ECC RAM. I'm also running Xen VMs though, so some of my RAM is used for running those. You can even do tripple-redundant raidz with ZFS now, so you could lose 3 drives without any data loss. For those that want really high availability, or really big arrays I suppose. I'm running 4x1.5TB in a raidz1, no problems. I do plan to keep a spare around though. I'll just use it to store backups to start with. If a drive goes bad, I'll drop it in and do a zpool replace. Don't worry about the command line. The ZFS based commands are pretty short and simple. Read up on zpool and zfs. Those are the commands you use the most for managing ZFS. There's also the ZFS best practices guide if you haven't seen it. Useful advice in there. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
