On Mon, 7 Jul 2008, Albert Chin wrote: >> Performance wise they are slower, we spent lots of time comparing FC >> in the 6140 to SAS in the 2540. > > Slower with the same speed disk and same speed FC HBA? How much slower?
The 2540 is obviously a lot cheaper. If you don't need the extra enterprise features and additional host ports provided by the 6140, you can purchase two or three top-end 2540s (not the 2501 SAS expansion chassis) for the same price and end up with two or three times the total performance. The 2501 SAS expansion chassis allows adding more storage capacity and IOPS via the same host ports but is unlikely to improve raw I/O throughput very much at all since it is limited to a SAS channel (3GBit) and total throughput seems to be limited by controller bandwidth (particularly for writes) rather than the drives. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
