Tim Cook wrote: > SAS drives are SAS drives, they aren't like SCSI. > There aren't 20 different versions with different pinouts.
Uh-huh... Reading some more articles, I think I found the answer to my question: the SAS connector seems to be dual-sided (with conductive stripes on both sides of the plastic) while SATA ports *seem* to be the same (for backward compatibility) but only have conductive stripes on one side. Something like that :) And the SAS connector is notched so the SAS drives can't plug in to protocol-incompatible SATA-only controllers. Also some articles stated that at one time there were single-port SAS drives, so there are at least two SAS connectors after all ;) > Multipathing is handled by mpxio. So I configure MPxIO, then feed the "zpool create" device names of multipathed aggregates, and hopefully failover should work. But can two paths work in parallel to double the bandwidth for ZFS (to single disk)? Or this depends on particular chips and drivers? Rationale: I've read a review article of an enterprise SSD which was sold back in SAS1 times (3Gbit/s) but performed at over 500Mbyte/s - and the reviewers used parallel MPIO with an LSI 9211-4i card in order to have so much actual bandwidth. Thanks, //Jim _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
