Date: Thu, 6 Nov 2008 22:01:39 +0100 (CET) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: Pieter Donche <Pieter.Donche@ua.ac.be> Cc: freebsd-questions@freebsd.org Subject: Re: Hardware Raid + hot-replace failed disk Message-ID: <20081106215647.A28070@wojtek.tensor.gdynia.pl> In-Reply-To: <Pine.GSO.4.63.0811061656130.1630@hmacs.cmi.ua.ac.be> References: <d05df8620810291007y3d18e5b8g8674477f1f00d810@mail.gmail.com> <geug4k$dnt$1@ger.gmane.org> <Pine.GSO.4.63.0811061122190.29135@hmacs.cmi.ua.ac.be> <Pine.GSO.4.63.0811061656130.1630@hmacs.cmi.ua.ac.be>
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> Suppose you have a system with multiple disks managed by a > hardware RAID controller in a RAID5 of RAID6 configuration, what is "RAID5 of RAID6"??? > > To FreeBSD it will look like e.g. a single large drive. > > If you want to extend your disk space by plugging in an extra > disk, the hardware RAID controller will probably detect it and > add it in his management, but will it be seen by FreeBSD? FreeBSD will see larger drive. you then have to fix partition table (use bsdlabel -e) fix c partition to be actually sized of whole drive, and then a) add new partition(s) for new space b) extend the size of last partition and use growfs > How can you make the added disk-space available for FreeBSD. > Can this be done without shutting down the system? How?? i don't think FreeBSD can be told to reget device info from controller when partitions of that device are mounted. but i may be wrong
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