October 5, 201015 yr I just want to confirm this is correct. I replaced one of my data drives. I simple stopped the array, shut down, replaced the drive, booted up and started the array. The new drive shows that it has a red ball and the Command area just is sitting at Starting...while the disk shows it is being written to. I am assuming that it is rebuilding the drive, correct? Also, how long does it normally take for it to rebuild? I had a 1 TB drive and now I replaced it with a 1.5 TB drive. The 1 TB drive had about 800 gigs of data on it.
October 5, 201015 yr I just want to confirm this is correct. I replaced one of my data drives. I simple stopped the array, shut down, replaced the drive, booted up and started the array. The new drive shows that it has a red ball and the Command area just is sitting at Starting...while the disk shows it is being written to. I am assuming that it is rebuilding the drive, correct? Also, how long does it normally take for it to rebuild? I had a 1 TB drive and now I replaced it with a 1.5 TB drive. The 1 TB drive had about 800 gigs of data on it. It does not matter how much data it had. The entire 1.5 GB of the new drive must be written. The average write speed of an array rebuilding a disk is fairly similar to the speed of an initial parity calculation. Let's assume you had a 50 MB/s speed. That speed would write 1GB in about 20 seconds. You have a 1.5TB drive to write. (1500 GB) That would take 1500*20 seconds or roughly 8.3 hours. If your write to the parity disk is faster, it will go a bit faster. If your initial parity calc was slower, at 30 MB/s it would take 33.33 seconds per GB, and 50,000 seconds to complete the re-construction, or 13.8 hours. You just need to wait it out. It is doing what has to be done. To see some real magic, try playing a movie from the disk being re-constructed. I was able to get 4 different movies playing from a disk being re-constructed to 4 different media players on different PC in my home while it was being re-constructed. Yes, each movie slowed down the re-construction, but it was fascinating to see the RAID really do its work. Joe L.
October 5, 201015 yr Author Cool. Just wanted to make sure I am doing it properly. I now see it says it's rebuilding. So what would happen if I cancel the rebuild? I wanted to physically connect the other drive as a new, drive #3 and have the new 1.5 TB drive rebuild while the other drive is just sitting there and for me to do a pre-clear on it. Basically can I cancel the rebuild and tell it try to rebuild again?
October 5, 201015 yr Cool. Just wanted to make sure I am doing it properly. I now see it says it's rebuilding. So what would happen if I cancel the rebuild? I wanted to physically connect the other drive as a new, drive #3 and have the new 1.5 TB drive rebuild while the other drive is just sitting there and for me to do a pre-clear on it. Basically can I cancel the rebuild and tell it try to rebuild again? I think so. I never tried that... Joe L.
October 5, 201015 yr Author Went ahead and gave it a try and seems to work that way. When I stopped the rebuild it game me an option to rebuild it. But I shut it down, placed in the old HDD to another SATA cable and started it back up. It started rebuilding again to the new drive and now I am running a pre-clear on the old drive.
October 5, 201015 yr Yes you can do that. But is it safe ? I mean, if one of your disks die during the rebuild, then you'll lose data because the old drive is not available anymore (pre-clearing) for reconstruting. For safety, I don't think it is a good idea. Wait for the rebuid to finish it's job and then pre-clear and expand the array.
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