On Sun, 22 Apr 2012 17:00:04 -0400 Veedar Hokstadt <veedar@xxxxxxxxx> wrote: > Consider a SATA drive /dev/sdb which is a member of an imsm RAID0 array... > > % sum /dev/sdb > 25645 156290904 > > The drive was imaged to a file without error and mounted as a loopback device... > > % sum /dev/loop2 > 25645 156290904 > > The checksums match as expected. But I can not examine the loopback I get.... > > % mdadm -E -v /dev/loop2 > mdadm: No md superblock detected on /dev/loop2. > > But I can examine the physical source drive /dev/sdb... > > % mdadm -E -v /dev/sdb > /dev/sdb: > Magic : Intel Raid ISM Cfg Sig. > Version : 1.0.00 > Orig Family : e92a11d9 > Family : e92a11d9 > Generation : 00001608 > UUID : 25137636:2ff64e75:10ae5444:4e8f609b > Checksum : e1237b20 correct > MPB Sectors : 1 > Disks : 2 > RAID Devices : 1 > > Disk01 Serial : 8068C3QVT > State : active > Id : 00010000 > Usable Size : 312577294 (149.05 GiB 160.04 GB) > > [Volume0]: > UUID : 72acd5fa:35c5a901:995af79b:83a29de1 > RAID Level : 0 > Members : 2 > This Slot : 1 > Array Size : 625154048 (298.10 GiB 320.08 GB) > Per Dev Size : 312577283 (149.05 GiB 160.04 GB) > Sector Offset : 0 > Num Stripes : 1221004 > Chunk Size : 128 KiB > Reserved : 0 > Migrate State : idle > Map State : normal > Dirty State : clean > > Disk00 Serial : 809BC541T > State : active failed > Id : 00000000 > Usable Size : 312577294 (149.05 GiB 160.04 GB) > > I'm trying to recover data from a failed RAID0. > I can successfully reassemble the RAID0 from the image files using > other proprietary recovery software. > But I would like to get it working with mdadm if at all possible. > Any ideas? > Try setting IMSM_NO_PLATFORM in the environment: IMSM_NO_PLATFORM=1 mdadm -E -v /dev/loop2 or export IMSM_NO_PLATFORM=1 mdadm -E -v /dev/loop2 I think this is fixed in more recent mdadm. You still need IMSM_NO_PLATFORM to create or assemble an array, but not just to look at it. NeilBrown
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