I never said its a "hardware RAID card problem". I am talking about a degraded raid 5 array in which 2 disks out of a total of 3 disks have been marked offline even though all 3 disks are listed in the card's gui. There is nothing wrong with the raid card itself. I would like to use mdadm to re-write the array's metadata so that the disks are accessible again. I have done it previously also but with an intel array and loads of help from Neil Brown. I am hoping he can work his magic again :) On Wed, Feb 27, 2013 at 11:39 AM, Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx> wrote: > On 2/26/2013 9:11 PM, Khurram Hassan wrote: >> I have a disabled raid 5 (3 disks) array on a Rocketraid 640. The full >> sequence of events follows. After the array was shown as degraded, I >> checked the webgui (under windows 7) which showed hard disk 3 was bad, >> so changed this hard disk and the rebuild started. After a few hours, >> I got a loud continuous beep from the system. Upon checking it, I >> found that hard disk 1 had bad sectors and was offline. At this time, >> the rebuild showed 85.1% complete. I clicked rescan and it came back >> on online. At this time, I started copying data from the raid disk to >> another hard disk which was not on the raid controller. The raid disk >> had three volumes and I successfully copied the first volume data. It >> was during data copy from the 2nd volume that hard disk 1 gave bad >> sector message again and went offline. I clicked rescan, it came >> online but then hard disk 2 and hard disk 3 went offline and the array >> became disabled. The 3 disks are still recognized by the controller, >> but the array shows only the 1st hard disk as part of the array. >> >> Can I use mdadm to recover this array or at least to get the 2nd hard >> disk as online so that I can copy data from it? I dont boot off the >> array; I have another hard disk for that purpose. I have installed >> ubuntu 12.04 on this boot hard disk and have loaded the driver for the >> controller in it. I dont see anyhard disk devices under /dev for it. I >> only have /dev/sdax which is for my boot hard disk. > > Is this RAID5 array created/controlled by the RocketRAID firmware or > Linux md/RAID (mdadm). It sounds like the RocketRAID. In which case, > why would you think mdadm could fix a hardware RAID card problem? > > -- > Stan > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
