Thanks for your reply but setting IMSM_NO_PLATFORM seems to have no effect... % export IMSM_NO_PLATFORM=1 % echo $IMSM_NO_PLATFORM 1 % mdadm -V mdadm - v3.2.3 - 23rd December 2011 % mdadm -E -v /dev/loop2 mdadm: No md superblock detected on /dev/loop2. % export IMSM_NO_PLATFORM="" % echo $IMSM_NO_PLATFORM % mdadm -E -v /dev/loop2 mdadm: No md superblock detected on /dev/loop2. And trying to assemble fails... export IMSM_NO_PLATFORM=1 % mdadm --assemble /dev/md0 /dev/loop1 /dev/loop2 mdadm: Cannot assemble mbr metadata on /dev/loop1 mdadm: /dev/loop1 has no superblock - assembly aborted Regards, V On Sun, Apr 22, 2012 at 5:58 PM, NeilBrown <neilb@xxxxxxx> wrote: > 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 > > -- 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
