This is the same experience we have, without a doubt the ‘dumb’ LSI SAS cards + MD are certainly faster and more flexible (actually, I should say MD is faster and more flexible). The LSI SAS2 chips scale up better via the expanders (even if the expanders / drives are SAS1) BUT – problem with all this performance, is it is disappointing when we lose it on XFS :( On Tue, Oct 13, 2009 at 8:53 PM, Richard Scobie <richard@xxxxxxxxxxx> wrote: > Asdo wrote: > >> Do you think it was controller's overhead? I have heard mixed opinions >> about 3wares. What are the fastest controllers around for MD-raid use? > > The fastest setup I have found have been LSI SAS cards - LSISAS3442E-R, with > the onboard RAID firmware replaced with the IT firmware. > > This is connected to port expander based JBOD chassis loaded with either > SAS or SATA drives. > > Regards, > > Richard > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
