On 7/21/2011 3:11 AM, Pol Hallen wrote: > Hello and sorry if I write you in private.. No worries. I'm taking this back on list as others have more experience with this than me. > about 2Tb wd and 4Kb size, is there a howto to check and correct the size of > these disks? > > Can you tell me how? > Model Number: WDC WD20EARS-00MVWB0 1. Can one create a RAID5 from bare (partition-less) AF drives and avoid the read-modify-write problem? 2. Or is one required to assemble the array from properly aligned partitions created on each drive? Pol, *IF* the answer to #1 is yes, creating the array properly becomes easier. Simply create the array with raw device names and no partition numbers, for example, sd[a,b,c,d,e,f]. If you've already created partitions on the drives, wipe everything off all drives, including the partitions tables. If the answer to #1 is 'no', and to #2 is 'yes', then you need to follow the instructions posted by Erwan Leroux. -- Stan -- 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