From mboxrd@z Thu Jan 1 00:00:00 1970 From: Reindl Harald Subject: Re: Linux software raid troubles Date: Wed, 12 Apr 2017 16:45:47 +0200 Message-ID: <8e9a25fc-5c81-103c-2ffa-4b46f2aa8630@thelounge.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Language: de-CH Sender: linux-raid-owner@vger.kernel.org To: linuxknight , linux-raid@vger.kernel.org List-Id: linux-raid.ids Am 12.04.2017 um 16:31 schrieb linuxknight: > Last weekend I was moving a server with a raid1 configuration, > controlled by a Intel Corporation 82801 SATA RAID Controller. Upon > reboot I noticed the degraded message (server hadnt been rebooted in a > couple years). > > The raid1 array was two 500gb black WD drives. I wasnt able to locate > an identical 500gb disk, but did find a 2TB just to get things > mirrored again. The bios screen accepted the replacement disk and > said it would rebuild in the OS. mdsync seemed to do its thing but I > noticed mdmon process was taking 200% cpu. I let it go a few days > thinking it was just taking longer than normal to sync, then rebooted. > It was in a complete failed state and wouldnt boot at all. After > removing the 2TB disk I was able to boot into the OS again. I just > assumed I needed a similar drive size for the second part of the > mirror. when you talk about a "SATA RAID Controller" and "The bios screen accepted the replacement disk and said it would rebuild in the OS" this sadly is not a "linux software raid" at it's own 197 Current_Pending_Sector -O--CK 200 200 000 - 9 198 Offline_Uncorrectable ----CK 200 200 000 - 7 i would strongly suggest https://www.gnu.org/software/ddrescue/ and make a image of that disk because after 39646 Power_On_Hours it's likely that the remaining disk fails completly in a short time and you could at least restore the disk-image with "dd" to a new disk if that happens as well as mount it with as loop-device