Date: Thu, 30 Jun 2005 02:02:18 -0700 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: "ptitoliv" <ptitoliv@frenchsuballiance.cjb.net>, <freebsd-questions@freebsd.org> Subject: RE: Software RAID-1 on FreeBSD 5.4 Message-ID: <LOBBIFDAGNMAMLGJJCKNCEOHFBAA.tedm@toybox.placo.com> In-Reply-To: <42C2FCE0.5000706@frenchsuballiance.cjb.net>
next in thread | previous in thread | raw e-mail | index | archive | help
One last comment for you on software mirroring, While I am not trying to disparage the various efforts, software mirroring provides limited redundancy unless the hard drives are on separate busses. If you do the common thing of putting 2 IDE drives as the master and slave on the primary IDE controller, than all it takes is a buss error on the IDE bus and you have scrambled the data on both hard drives. The same problem exists if you setup a ccd or vinum or gmirror or whatever on a SCSI controller where the disks are all on the same SCSI bus. The same problem also exists on SATA controllers, and on cheaper hardware RAID cards where the disks are on a single IDE bus. This is why hardware RAID controllers are quite often better as the better ones contain multiple interfaces. Ted >-----Original Message----- >From: owner-freebsd-questions@freebsd.org >[mailto:owner-freebsd-questions@freebsd.org]On Behalf Of ptitoliv >Sent: Wednesday, June 29, 2005 12:56 PM >To: freebsd-questions@freebsd.org >Subject: Re: Software RAID-1 on FreeBSD 5.4 > > >Hello again, > >Thank you for all your answers ! I am going to look at gmirror and ccd. >But I have a last question. My disks are differents. One is a Maxtor >detected with a 111 GB capacity and the other is a Seagate detected with >a 114 GB capacity. Will I have problems trying to use RAID with this >configuration ? > >Best regards, >ptitoliv > >_______________________________________________ >freebsd-questions@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-questions >To unsubscribe, send any mail to >"freebsd-questions-unsubscribe@freebsd.org" >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?LOBBIFDAGNMAMLGJJCKNCEOHFBAA.tedm>