On Thursday September 17, maan@xxxxxxxxxxxxxxx wrote: > On 07:01, NeilBrown wrote: > > > Wrong lesson. The correct lesson to gather from this is to prefer > > > version 1.1 or 1.2 superblocks wherever possible. Superblocks at the > > > beginning of the device disappear when there is no partition table, > > > superblocks at the end can be confused for superblocks belonging to > > > the whole device when there is no partition table. > > > > 1.0 also protects from this problem. The 1.x metadata stores the > > offset of the superblock from the start of the device. That will appear > > to be wrong if you find a partition-superblock when reading from a > > whole-device, so mdadm will reject the device as not having a valid > > superblock. > > BTW: Why are new arrays still created with 0.90 metadata format by > default? Because I'm a chicken.... I guess it probably is time ... but to we make the default 1.0, which is compatible with people's expectations, to 1.1 which is generally a safer approach (you cannot mount a bare device by mistake). Of course a distro can import their own default using the CREATE line in mdadm.conf. 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
