Michel Kintz writes: > Matthew Ahrens a écrit : > > > Richard Elling - PAE wrote: > > > >> Anthony Miller wrote: > >> > >>> Hi, > >>> > >>> I've search the forums and not found any answer to the following. > >>> > >>> I have 2 JBOD arrays each with 4 disks. > >>> > >>> I want to create create a raidz on one array and have it mirrored to > >>> the other array. > >> > >> > >> Today, the top level raid sets are assembled using dynamic striping. > >> There > >> is no option to assemble the sets with mirroring. Perhaps the ZFS > >> team can > >> enlighten us on their intentions in this area? > > > > > > Our thinking is that if you want more redundancy than RAID-Z, you > > should use RAID-Z with double parity, which provides more reliability > > and more usable storage than a mirror of RAID-Zs would. > > > > (Also, expressing "mirror of RAID-Zs" from the CLI would be a bit > > messy; you'd have to introduce parentheses in vdev descriptions or > > something.) > > It is not always a matter of more redundancy. > In my customer's case, they have storage in 2 different rooms of their > datacenter and want to mirror from one storage unit in one room to the > other. > So having in this case a combination of RAID-Z + Mirror makes sense in > my mind .... or ? > > Michel. > > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
you may let the storage export RAID-5 luns and let ZFS mirror those. Would that work ? -r _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
