From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Leach Subject: Re: 3ware raid question Date: Tue, 2 Aug 2005 13:27:22 -0700 Message-ID: <602f2f2b05080213272aec2685@mail.gmail.com> References: <3800555526607650241@unknownmsgid> Reply-To: Jason Leach Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Return-path: In-Reply-To: <3800555526607650241@unknownmsgid> Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Raz: The 3ware (at least my 9500S-8) keeps the info about the disk and how it fits into the RAID array on the disk; I think in the DCB is used for this. You can (and I have) unplug the disks, then connect them to different ports and the array will still work fine. When you are adding a disk from a different array it probably has the DCB from that array. This is conflicting with your new array. I would do as the Dan suggests, and clear the disk. Jason. On 8/2/05, Dan Stromberg wrote: On Tue, 2005-08-02 at 13:52 +0300, Raz Ben-Jehuda(caro) wrote: > i have encountered a weired feature of 3ware raid. > When i try to put inside an existing raid a disk which > belonged to a different 3ware raid if fail. > Any idea anyone ? Two thoughts: 1) Maybe test the disk in another machine and see if it's still good 2) Maybe wipe the disk clean in another machine with something like: dd if=/dev/zero of=/dev/sdb ...but be very careful to get the right disk (IE, you may not need /dev/sdb, you might need /dev/hdd or a number of other possibilities).