Date: Mon, 26 Feb 2007 08:37:14 +0100 From: MeX <mex@active.sk> To: freebsd-hardware@freebsd.org Subject: Re: Hardware supported? Message-ID: <20070226073714.GA67880@active.sk> In-Reply-To: <45E2224B.9030605@fluffles.net> References: <45E1DA61.8090607@paultjuh.org> <45E2224B.9030605@fluffles.net>
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On Mon, 2007-Feb-26 at 00:56:59 +0100, Fluffles wrote: > Onboard RAID does not really exist. The actual RAID is done by drivers; > onboard RAID is actually software RAID with a minor RAID BIOS which can > write metainformation about the array configuration and has BIOS > bootstrap support. This is also called "fake RAID". FreeBSD does support > some fake RAID metainformation though, by reading the metainfo from the > disks and assigning it's own software RAID-mechanism to it. For > information of which metainformation formats are supported, checkout the > ataraid(4) manpage: > http://www.freebsd.org/cgi/man.cgi?query=ataraid&apropos=0&sektion=4&manpath=FreeBSD+6.2-RELEASE&format=html > > If your fakeraid is called "Intel MatrixRAID", then yes FreeBSD does > detect the metainfo and you will have a "ar0" for your first fakeraid > array. You should be able to install (and boot) from fakeRAID since > there is BIOS bootstrap support. What does mean that ataraid driver can NOT write metadata format? I use NVIDIA MediaShield on SUN X2100 M2 and it seems that all works: s1# atacontrol list ATA channel 0: Master: no device present Slave: no device present ATA channel 1: Master: no device present Slave: no device present ATA channel 2: Master: ad4 <ST3160827AS/3.42> Serial ATA v1.0 Slave: no device present ATA channel 3: Master: ad6 <ST3160827AS/3.42> Serial ATA v1.0 Slave: no device present s1# atacontrol status ar0 ar0: ATA RAID1 subdisks: ad6 ad4 status: READY s1# pciconf -lv atapci1@pci0:5:0:class=0x010485 card=0x534c108e chip=0x037f10de rev=0xa3 hdr=0x00 vendor = 'NVIDIA Corporation' class = mass storage subclass = RAID dmesg output: ad4: 152627MB <Seagate ST3160827AS 3.42> at ata2-master SATA150 ad6: 152627MB <Seagate ST3160827AS 3.42> at ata3-master SATA150 ar0: 152627MB <nVidia MediaShield RAID1> status: READY ar0: disk0 READY (master) using ad6 at ata3-master ar0: disk1 READY (mirror) using ad4 at ata2-master MeX
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