On Sat 18 Apr 2015 03:13:52 PM Mikael Abrahamsson wrote: > On Fri, 17 Apr 2015, Thomas Fjellstrom wrote: > > I had a 5 disk Raid5 with 3TB disks. One disk threw some errors (but still > > seemed to work), and i decided to replace it. I actually bought two > > drives, > > If you have a not-ancient kernel, you should have issued the replace > command. You should have added one new drive as spare, then (with a new > mdadm) issued the --replace command. This would have started copying the > drive you wanted replaced onto the spare. Then after all this was done, > you could have added another spare and told it to re-shape to raid6. > That's at least what I would have done. > > http://unix.stackexchange.com/questions/74924/how-to-safely-replace-a-not-ye > t-failed-disk-in-a-linux-raid5-array Yes, I could have. The machine's drive bays were full at the time, it wasnt till I had inserted the new drives that I realized i could have left the old one in and done a copy or replace. But then the machine was booting without it and probably not a great time to put the old disk back in (though an assemble force could have brought it back?). It's almost 60% done, so it's not a huge problem. I was just curious as to how long an actual raid5->raid6 reshape would normally be or this setup. I expect it normally can take a while as it has to rewrite a lot of data (11TiB worth). -- Thomas Fjellstrom thomas@xxxxxxxxxxxxx -- 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
