Date: Sun, 6 Mar 2005 12:56:32 +0100 From: Emanuel Strobl <emanuel.strobl@gmx.net> To: freebsd-stable@freebsd.org, David Magda <dmagda@ee.ryerson.ca> Subject: Re: Need really cheap IDE mirroring PCI controlled for FreebBSD 4.10 Message-ID: <200503061256.37163@harrymail> In-Reply-To: <54594d81c34e19a27f138574ce4042fa@ee.ryerson.ca> References: <20050302104641.44708.qmail@web54004.mail.yahoo.com> <200503040120.38410@harrymail> <54594d81c34e19a27f138574ce4042fa@ee.ryerson.ca>
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--nextPart1765589.1fWMoj7pnB Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Am Samstag, 5. M=E4rz 2005 02:06 schrieb David Magda: > On Mar 3, 2005, at 19:20, Emanuel Strobl wrote: > > If you consider upgrading to 5.4 you can use any onboard chipset or > > cheap > > controller card with some geomclasses, namely g_mirror. It's fantastic > > and > > the only stateful mirror solution I know. And you can mirror only > > parts of > > your disk, or mirror across 3 drives aso. The power of geom :) > > This can be done with 4.x. From atacontrol(8): > > create Create a type ATA RAID. The type can be RAID0 (stripe), > RAID1 This is not stateful! Nor does it allow to mirror parts of the disk=20 (labels/GPT partitions). Also I can't imagen how to mirror across more then= =20 two disks. You can't compare those and there are several cases where ata-builtin RAID= =20 support fails on different controllers. Also you don't have the "atacontrol addspare" command on 4.x which makes it= s=20 RAID1 function useless on anything but the promise controllers! And he was= =20 looking for cheap controllers which disqualifies the promise. > (mirror), RAID0+1 or SPAN (JBOD). In case the RAID has a > RAID0 [...] > > Vinum(8) is also available on 4.x. But vinum isn't statful too. And vinum doesn't provide g_gate for example. =2DHarry --nextPart1765589.1fWMoj7pnB Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQBCKu/1Bylq0S4AzzwRAiNNAJ9pusuAdYl7NXKrG+pfpqPHTDcbFACfTaRW ATbxSzXb5sgGpJgY78ZlRNQ= =QzFv -----END PGP SIGNATURE----- --nextPart1765589.1fWMoj7pnB--
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