Also in reply to the previous email by Will. Can anyone shed more light on the combination lsi sas hba , the lsisasx36 expander chip (or it's relatives) and sata disks. I'm investigating a migration from discrete channels (like in the thumper) to a multiplexed solution via a sas expander. I'm aware that there's a penalty but for my workload that's acceptable. Only when a wide sas port (4 links) is used, which should result in a theoretical throughput of 1.2GB/s. But Will reported only 300MB/s, which corresponds to a single link. >From the limited information available regarding the lsi expanders, I found >that support for the SataTunnelProtocol is present. From the expander to the >hba only sas packets will go and therefore I see obstacle for not using a wide >port. Can this be a cable problem or a hba problem or firmware? Perhaps readers would like to share their experience with a similar setup and what setup they used. What's the throughput when only using sas disks?
Regards, Frederik -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
