On Thu, 20 May 2010 07:45:23 -0600 "Keith ." <lukano@xxxxxxxxx> wrote: > Does mdadm 3.1.x not support shrinking the number of disks in a RAID5 array? > > I have successfully converted my 6x1.5tb RAID6 array to a 6x1.5tb > RAID5 array. The issue that I now face is that one of those 6 drives > is failed / removed, and as a result - the new RAID5 array is down > it's parity drive. > > I knew I was short a disk when I started the process, but I was under > the assumption that mdadm now supported shrinking of RAID5/6 arrays. > Am I mistaken, or can anyone throw some suggestions at me so I can > give it a try? It should work. mdadm -G /dev/mdX --raid-devices 5 --array-size=XXXXX --backup=/root/backup-file If you don't give the 'array-size' value mdadm will tell you what it has to be. You need to be sure that all your data is already within that space. 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
