Hello, I have a question about using the `copies` option in zfs. If I were to make a non-redundant zpool of say 3 hard drives, but set the `copies` option to something like 2 or 3, would that protect me in the event of a hard drive failure? Or would raidz be the only way to really protect against the loss of a hard drive? Thank you, Robert Parkhurst Systems Administrator Gresham Enterprise Storage www.greshamstorage.com O: 512.407.2694 M: 512.698.7419 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20090324/fd56a4be/attachment.html>
Robert Parkhurst wrote:> I have a question about using the `copies` option in zfs. > > If I were to make a non-redundant zpool of say 3 hard drives, but set > the `copies` option to something like 2 or 3, would that protect me in > the event of a hard drive failure?No it won''t because if a drive completely fails then the pool won''t import. The copies option is to help with partial failures of a drive but doesn''t help with complete failure if there is no other redundancy in the pool level devices.> Or would raidz be the only way to > really protect against the loss of a hard drive?With only 3 disks then raidz is your only choice but note that you can''t boot from a raidz or a stripe only mirrors (1 or more sides) are supported for booting from. -- Darren J Moffat