On Jun 6, 2013, at 5:28 AM, Nicolas Michel <be.nicolas.michel@xxxxxxxxx> wrote: > 2013/6/6 Aleh Suprunovich <a.suprunovich@xxxxxxxxxxxxxxxxx>: >> On Thu, Jun 06, 2013 at 06:00:44PM +0300, Nicolas Michel wrote: >>> It is better but it still doesn't work: >>> $ mdadm --assemble /dev/md1 --run /dev/sdc1 >>> mdadm: failed to RUN_ARRAY /dev/md1: Input/output error >>> mdadm: Not enough devices to start the array. >>> >> >> One device should be enough to start RAID1 array. But here is something I missed >> in your first message: >> >> On Thu, Jun 06, 2013 at 05:47:33PM +0300, Nicolas Michel wrote: >>> ############################################################ >>> # $ mdadm --examine /dev/sdc1 >>> # /dev/sdc1: >>> # Magic : a92b4efc >>> # Version : 0.90.00 >>> # UUID : 76fc436c:be43bed5:f0f41dd6:3e9e1b96 >>> # Creation Time : Fri Jun 8 04:21:19 2012 >>> # Raid Level : raid1 >>> # Used Dev Size : 20980800 (20.01 GiB 21.48 GB) >>> # Array Size : 20980800 (20.01 GiB 21.48 GB) >>> # Raid Devices : 2 >>> # Total Devices : 2 >>> # Preferred Minor : 0 >>> # >>> # Update Time : Thu May 23 14:55:13 2013 >>> # State : clean >>> # Active Devices : 1 >>> # Working Devices : 2 >>> # Failed Devices : 0 >>> # Spare Devices : 1 >>> # Checksum : b0ae04f1 - correct >>> # Events : 28935 >>> # >>> # >>> # Number Major Minor RaidDevice State >>> # this 2 8 1 2 spare /dev/sda1 >>> # >>> # 0 0 0 0 0 removed >>> # 1 1 8 17 1 active sync /dev/sdb1 >>> # 2 2 8 1 2 spare /dev/sda1 >>> ############################################################ >> >> Line starting from 'this' indicate that device you have was spare component of >> array, so no information restore is possible with this disk. Do you have acess >> to other drive, named /dev/sdb1 in your mdadm --examine output? > > I didn't saw it. It is a possibility that the disk was configured as > spare in the IOMEGA device. The second disque have its GPT table > corrupt. > > So it would mean that the data are lost since the first disk is > corrupted and the second, as a spare device, have no data on it. > > (I'm not the one that configured in first place the IOMEGA device. The > guys that are using it came to me to see if I can recover their data) > > With a RAID1 and 0.90 metadata you would be able to just use that disk directly without even assembling the array for recovery purposes. If you don't see the data on it (as you probably won't since it is a spare) it's useless, but if you find an actual member disk this information may be useful for you. Sam -- 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
