> Exporting them as one huge iSCSI volume is good if you're paranoid about data > loss. You can use raid5 or 6 on the Linux servers, and then mirror those > large volumes with ZFS. The downside is that it's much harder to add > storage. I don't know if iSCSI volumes can be expanded, so you might have to > break the mirror, create a larger iSCSI volume and resync all your data with > that approach.
Just be careful with respect to writer barriers. The software raid in Linux does not support them with raid5/raid6, so you loose the correctness aspect of ZFS you otherwise get even without hw raid controllers. (Speaking of this, can someone speak to the general state of affairs with iSCSI with respect to write barriers? I assume Solaris does it correctly; what about the bsd/linux stuff? Can one trust that the iSCSI targets correctly implement cache flushing/writer barriers?) -- / Peter Schuller PGP userID: 0xE9758B7D or 'Peter Schuller <[EMAIL PROTECTED]>' Key retrieval: Send an E-Mail to [EMAIL PROTECTED] E-Mail: [EMAIL PROTECTED] Web: http://www.scode.org
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