On Tuesday November 2, AndyLiebman@xxxxxxx wrote: > >neilb@xxxxxxxxxxxxxxx writes: > >Release 1.8.0 adds: > > - --pid-file option to declare a file to record the pid in for > > --monitor --daemonise > > - Support for new "faulty" personalitiy (see md.4) - not submited to > > kernel.org yet. > > - support for raid0 and linear over devices larger than 2 Terabytes. > > - assorted bug fixes. > > Hello Neil, > > Is this to say that earlier versions of mdadm did NOT support RAID-0 on > devices larger than 2 TB? > > I have been using mdadm 1.6 to create a 4.8 TB RAID-0 array (md0) on top of > two 3ware 2.4 TB Hardware RAID-5 arrays (/dev/sda and /dev/sdb) -- and so far I > don't see any problems. The RAID-0 is created without trouble. The resulting > size is reported as 4.8 TB. The performance is awesome. And, presumably, the > data protection is sound. > > Am I missing something? Hmmm... I might work with 1.6 if you --build that raid0 (rather than --create), or if you are using a 64bit processor like alpha or ia64. But mdadm 1.6 definitely have problems in i386 processors when you try to --create a raid0 with devices larger than 2 terabytes. 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
