roman, stan, thanks for your input. I should have added some more information: the mainboard is an intel D510MO which has "only" one PCI slot and 2 SATA ports. one port runs a 60GB SSD (system), the 2nd one a 3TB WD drive for temporary data. http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-di510mo.html the 4x 1.5TB drives are connected to the promise TX4 300 in the only PCI slot. lspci: 00:1f.2 SATA controller: Intel Corporation N10/ICH7 Family SATA Controller [AHCI mode] (rev 01) according to the kernel wiki PMP is not supported by the ICH7 chipset. the 2nd application is an old avantek server with a tyan S2882-D mainboard and 8 drive bays which I want to fill with old drives for backup purposes. the 4port onboard SATA controller doesn't even recognize 750GB drives (hangs at startup). http://www.tyan.com/archive/products/html/thunderk8sdpro.html performance is not an issue in both cases. both are more or less just for storage, no time critical applications. -- rainer ------------------------------------------------------------------------------ Unix gives you just enough rope to hang yourself -- and then a couple of more feet, just to be sure. (Eric Allman) ------------------------------------------------------------------------------ -- 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
