search for: bcsvl

Hi, I have just recovered from a ZFS crash. During the antagonizing time this took, I was surprised to learn how undocumented the tools and options for ZFS recovery we''re. I managed to recover thanks to some great forum posts from Victor Latushkin, however without his posts I would still be crying at night... I think the worst example is the zdb man page, which all it does is to ask you

...empt to import the pool results in a panic. I have tried from my snv_134 install, from the live cd, and from nexenta. I have tried various zdb incantations (with aok=1 and zfs:zfs_recover=1), to no avail - these error out after a few minutes. I have even tried another controller. I have zdb -e -bcsvL running now from 134 (without aok=1) which has been running for several hours. Can zdb recover from this kind of situation (with a half-destroyed filesystem that panics the kernel on import?) What is the impact of the above zdb operation without aok=1? Is there any likelihood of a recovery of no...

(From the README) # Jeb Campbell <jebc at c4solutions.net> NOTE: This is last resort if you need your data now. This worked for me, and I hope it works for you. If you have any reservations, please wait for Sun to release something official, and don''t blame me if your data is gone. PS -- This worked for me b/c I didn''t try and replace the log on a running system. My

..._write+17f () ffffff00f85789e0 zfs:space_map_sync+295 () ffffff00f8578a70 zfs:metaslab_sync+2de () ffffff00f8578ad0 zfs:vdev_sync+d5 () ffffff00f8578b80 zfs:spa_sync+44b () ffffff00f8578c20 zfs:txg_sync_thread+247 () ffffff00f8578c30 unix:thread_start+8 () ----- END PANIC ----- I then ran zdb -e -bcsvL tank and got this output after letting it run all night: ----- SNIP ----- Traversing all blocks to verify checksums ... zdb_blkptr_cb: Got error 50 reading <0, 80, 0, 0> DVA[0]=<0:28b61ec9600:1200> DVA[1]=<0:149e50a5400:1200> DVA[2]=<0:9f83efe800:1200> [L0 SPA space map]...

Now at 36 hours since zdb process start and: PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP 827 root 4936M 4931M sleep 59 0 0:50:47 0.2% zdb/209 Idling at 0.2% processor for nearly the past 24 hours... feels very stuck. Thoughts on how to determine where and why? -- This message posted from opensolaris.org