On Sat, Sep 14, 2013 at 12:50 PM, Martin Wilck <mwilck@xxxxxxxx> wrote: > I just had the following weird effect under OpenSUSE 12.3, kernel > 3.7.10-1.16. I am wondering if it's a known problem. > > Creating a RAID5 array (format doesn't seem to matter) either with the > openSUSE native mdadm 3.2.6 or mdadm 3.3, and running mke2fs on it, > fails. The RAID array is broken after that, all disks faulty, any IO fails. > > Further examination shows that the problem is related to mke2fs trying > to discard blocks. Running "-E nodiscard" or setting "discard=no" in > mke2fs.conf fixes the problem. Unfortnately, "discard" seems to be the > default. > > Details under https://bugzilla.novell.com/show_bug.cgi?id=840413 > > Has anyone seen this before? This sounds like the issue addressed by: 66c28f9 [SCSI] sd: Update WRITE SAME heuristics 5026d7a md/raid1,5,10: Disable WRITE SAME until a recovery strategy is in place -- 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
