On Mon, May 22, 2006 at 07:19:30AM -0700, Wes Williams wrote: > Could anyone confirm that with the recent additions to ZFS, most > notably ZFS version 2, that a ZFS pool created in b37 or older will > still be readable/importable in b38 ZFS version 2 and newer?
Yes. If you do not do an explicit "zpool upgrade", the pool will continue to be written as version 1, and will still be readable on older versions of the software. Once you do a "zpool upgrade", you won't be able to access the pool from earlier releases. > If so, is there any serious negative impact on the using an existing > ZFS pool or should the older pool be destroyed and recreated? The only negative impact of using a version 1 pool is that you can't take advantage of ditto blocks (metadata replication). Unless you want to access the pool from older hosts, it is recommended that use 'zpool upgrade'. This will turn on metadata replication for subsequent writes. If you want to be sure that you have all possible ditto blocks, you would have to destroy and recreate the pool. - Eric -- Eric Schrock, Solaris Kernel Development http://blogs.sun.com/eschrock _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
