On Tuesday January 17, djani22@xxxxxxxxxxxxx wrote: > > > > - add disks to increase size of raid5 > > Possible offline with raidreconfig > > Possible online with alpha-quality patches that I am > > working on today. Will publish for experimentation/testing > > later this week. Hopefully stable by late Feb. > > This patch will can do also chunksize conversion? :-) Not currently, but it shouldn't be too hard to add. > And / or converting from N disk to N disk with different chunksize? No. This is impossible to do both efficiently and safely with NVRAM. Even if you give up "efficiently" you need some temporary storage space. You would need to copy a stripe to some temporary storage Update the metadata to record that the stripe has moved copy the stripe back with the new geometry Update the metadata to record the movement repeat It certainly could be done, but I doubt the demand would be high enough to justify it. The situation is similar for raid5-raid6 or raid0-raid5 conversions that done increase the size of the array (i.e. only add one device). They require update-in-place which is hard to do in a way that still protects your data if there is a power failure. 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
