On Monday August 7, jamespev@xxxxxxxxxxxx wrote: > > I have a software raid 5 setup with four drives. One drive failed. I > got a replacement but unfortunately it turns out that my original disks > were just a few gigs over the replacement. It seems that most > manufacturers don't actually advertise the REAL capacity of the disk, so > getting one that is the same size as the old ones could be tough.(and > they aren't available anymore of course...) > > So my question... can I resize the array while it is missing a drive? > The raid is <50% full, and the few gigs is only a few percent. In > retrospect I shouldn't have sized them right to the limit... Yes, that should work. First resize the filesystem to make it smaller. Then resize the array mdadm --grow /dev/mdX --size=whatever You have to calculate 'whatever' yourself. It is in kibibytes and must be 128K < size of new drive, and obviously must leave room for the filesystem. A good suggestion is: shrink the filesystem a lot. shrink the array an adequate amount add the new drive resize the array up to 'max' (mdadm -G /dev/mdX --size=max) resize the filesystem up to max. 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
