I've recently acquired some storage and have been trying to copy data from a remote data center to hold backup data. The copies had been going for weeks, with about 600GB transferred so far, and then I noticed the throughput on the router stopped. I see a pool disappeared.
# zpool status -x pool: pool4_green state: FAULTED status: The pool metadata is corrupted and the pool cannot be opened. action: Destroy and re-create the pool from a backup source. see: http://www.sun.com/msg/ZFS-8000-72 scrub: none requested config: NAME STATE READ WRITE CKSUM pool4_green FAULTED 0 0 1 corrupted data raidz2 ONLINE 0 0 6 c10t0d0 ONLINE 0 0 0 c10t1d0 ONLINE 0 0 0 c10t2d0 ONLINE 0 0 0 c10t3d0 ONLINE 0 0 0 c10t4d0 ONLINE 0 0 0 c10t5d0 ONLINE 0 0 0 c10t6d0 ONLINE 0 0 0 I powered down the system and all the disk systems and powered up fresh. I tried to clear the error: #zpool clear pool4_green internal error: Bad exchange descriptor Abort (core dumped) So then I took a look with zdb: #zdb -vvv pool4_green version=15 name='pool4_green' state=0 txg=83 pool_guid=3115817837859301858 hostid=237914636 hostname='galaxy' vdev_tree type='root' id=0 guid=3115817837859301858 children[0] type='raidz' id=0 guid=10261633106033684483 nparity=2 metaslab_array=24 metaslab_shift=36 ashift=9 asize=6997481881600 is_log=0 children[0] type='disk' id=0 guid=11313548069045029894 path='/dev/dsk/c10t0d0s0' devid='id1,s...@n60026b9040e26100139d8514065a1d67/a' phys_path='/p...@0,0/pci8086,3...@4/pci1028,1...@0/s...@0,0:a' whole_disk=1 children[1] type='disk' id=1 guid=5547727760941401848 path='/dev/dsk/c10t1d0s0' devid='id1,s...@n60026b9040e26100139d851d06ec511d/a' phys_path='/p...@0,0/pci8086,3...@4/pci1028,1...@0/s...@1,0:a' whole_disk=1 children[2] type='disk' id=2 guid=8407102896612298450 path='/dev/dsk/c10t2d0s0' devid='id1,s...@n60026b9040e26100139d85260770c1bf/a' phys_path='/p...@0,0/pci8086,3...@4/pci1028,1...@0/s...@2,0:a' whole_disk=1 children[3] type='disk' id=3 guid=17509238716791782209 path='/dev/dsk/c10t3d0s0' devid='id1,s...@n60026b9040e26100139d852f07fea314/a' phys_path='/p...@0,0/pci8086,3...@4/pci1028,1...@0/s...@3,0:a' whole_disk=1 children[4] type='disk' id=4 guid=18419120996062075464 path='/dev/dsk/c10t4d0s0' devid='id1,s...@n60026b9040e26100139d8537086c271f/a' phys_path='/p...@0,0/pci8086,3...@4/pci1028,1...@0/s...@4,0:a' whole_disk=1 children[5] type='disk' id=5 guid=8308368067368943006 path='/dev/dsk/c10t5d0s0' devid='id1,s...@n60026b9040e26100139d85440934f640/a' phys_path='/p...@0,0/pci8086,3...@4/pci1028,1...@0/s...@5,0:a' whole_disk=1 children[6] type='disk' id=6 guid=14740659507803921957 path='/dev/dsk/c10t6d0s0' devid='id1,s...@n60026b9040e26100139d854a09957d56/a' phys_path='/p...@0,0/pci8086,3...@4/pci1028,1...@0/s...@6,0:a' whole_disk=1 zdb: can't open pool4_green: Bad exchange descriptor So what is this "Bad exchange descriptor" and do I have a prayer on getting my data back? Thanks, Brian _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
