Hi everybody, thanks for at very good source of information! I hope maybe you guys can help out a little. I have 3 disk, one usb 300gb and 2x150gb ide. I would like to get the most space out of what ever configuration i apply. So i''ve been thinking (and testing without success), is it at all possible to stripe the two smaller disks and then mirroring that stripe with the lager one? I''ve tried all kinds of maneuvers, except destroying everything and start from scratch. The thing is i''ve already got 20gb data on a mirror containing the two smaller disks. So i''ve sort of had to zigzag a little bit moving the data around. But i will start from scratch if needed. Any ideas? Thanks in advance. This message posted from opensolaris.org
Using ZFS ofcourse *g* This message posted from opensolaris.org
I thought that too, but actually, I''m not sure you can. You can stripe multiple mirror or raid sets with zpool create, but I don''t see any documentation or examples for mirroring a raid set. However, in this case even if you could, you might not want to. Creating a stripe that way will restrict the speed of the IDE drives: They will be throttled back to the speed of the USB disk. What I would do instead is create a mirror of the two IDE drives, then use zfs send/receive to send regular backups to the USB drive. This message posted from opensolaris.org
Ross wrote:> I thought that too, but actually, I''m not sure you can. You can stripe multiple mirror or raid sets with zpool create, but I don''t see any documentation or examples for mirroring a raid set. >Split the USB disk in half, then mirror each IDE disk to a USB disk half.> However, in this case even if you could, you might not want to. Creating a stripe that way will restrict the speed of the IDE drives: They will be throttled back to the speed of the USB disk. >You should be able to get 30 MBytes/s or so to/from a USB disk. For most general purpose use, this is ok.> What I would do instead is create a mirror of the two IDE drives, then use zfs send/receive to send regular backups to the USB drive. >Yes, this is a safer and longer-term view. I store my USB drives in fire safes, one at my house, one someplace else. -- richard