On 10/5/2012 8:33 AM, Rainer Fügenstein wrote: > 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. Ok, that sucks. So you're stuck with PCI on this box. As I mentioned, contact Promise and inquire about using 3TB drives with the 300 TX4, just for piece of mind. As John mentioned the TX4 BIOS/firmware shouldn't be an issue. This is a 48bit LBA controller and theoretically can access a single disk drive of up to 144PB in size. The barrier here, if any, will be your kernel. If you're running a 32 bit kernel you can't address all 48 LBA bits, only 32 of them. Thus you can only access ~2TB of an LBA48 3TB drive. The math: ((((2^32=4294967296) * 512B) = 2199023255552) / 1048576^2) = 2TB This is the cause of the 2TB drive size limit you read about all over the web. If you have a 64bit kernel with an LBA48 controller (most are) then this shouldn't be an issue, as all 48 LBA bits are addressable by a 64bit kernel. With a 64bit kernel, if the TX4 doesn't give you all 3TB per drive, then there's a driver or firmware bug present. > 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 Assuming the hot swap bays in the chassis are indeed SATA/SAS and not SCSI/SCA, then your best, least expensive, solution is the SuperMicro AOC-SAT2-MV8 64-bit PCI-X133MHz: http://www.newegg.com/Product/Product.aspx?Item=N82E16815121009 Provides you 8 SATA-II ports in a PCI-X 133MHz card for the same price as two 4 port PCI 32/33 cards, but with 4 times the bandwidth. Nobody makes an 8 port PCI 32/33 card, so this is as good as it gets for the money. Check your Tyan manual. Running a PCI-X 133 card usually requires disabling/leaving empty the sister slot on that PCI-X bus, and/or setting some jumpers. This Tyan board, as with most PCI-X workstation/entry server boards, has two PCI-X buses, two slots on each bus. These bandwidth and bus electrical loading hoops PCI-X requires us to jump through directly resulted in the birth of serial PCI Express interconnect. No more shared buses, all slots usable, no hoops. You provided no details of the chassis or backplane(s) or I could tell you which, if any, reverse breakout cables you need. If the backplane(s) have 8 cable connectors you're golden. If they have 2xSFF8087 connections then you'll need two reverse breakout cables. -- Stan -- 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
