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Forum Discussion
ReadyNAS 3138: very slow sync, and disk tray green fault lights stay on after adding two new drives.
Purchased ReadyNAS RN3138 (4-drive bay rackmount) in May; initial Netgear support just expired. Initially had installed two WD Gold 6TB drives with default X-RAID with no problems. Just added two WD Red Pro 10TB drives. As per NG instructions, I added the two drives while the NAS was running. Two concerns:
1. With only about 2-3 TB on data on original drives, it took about two days for each of the new drives to sync into the X-RAID system. Seemed excessive, as if something was wrong, but system eventually said it was done and all was well.
2. The lower drive tray LED's ("fault LED's" per NG Hardware Manual) for both new drives have been solid bright green ever since I installed the drives with no change after the long sync period completed. I've searched the web and NG manuals for explanation and found none. In it's RN3138 section, the ReadyNAS Hardware Manual doesn't even mention constant green as a possibility for the lower drive tray LED's.
Anyone with similar experience?
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A sync touches every sector, used or not, so your sync time is not unusual, and possible too short. The manual seems inconsistent on the meaning of the LEDs. But I believe the top should be solid green and the bottom blinking/solid green to indicate activity and red for a fault. Your NAS would have needed to do three re-syncs: One of the first drive added to the orignal two, a second of the second drive added to the first three, then a then an expansion using the additional space of the two new ones. Are you sure all the syncs are done?
The top disk tray LED is a soft green on all four drives, and I believe this is normal. On the two new drives, it's the lower LED's which have been solid bright green even since I inserted the drives in the NAS. The hardware manual only lists three possibilities for the bottom LED: blinking green, off, or solid red.
I was not aware of a third sync, but the NAS seems to be done with syncing. I might have made a mistake when I added drive #4 while drive #3 was still syncing after about 36hours. Then the NAS announced that #3 was done a few hours after I inserted #4, and then #4 began to sync and took about the same amount of time as #3. I could not find in the manual whether to insert two new drives at the same time or sequentially.
If the bright green LED's stay on, I might move my data while it's still limited in size and then reformat all four drives and start over with 4 drives from the beginning.
When you are adding drives, adding one while another is syncing is fine. It doesn't make things go any faster or slower, but it does eliminate the wait time if you aren't present to instert the second when the first one completes sync. I don't know why re-formatting the drives would make any difference when it comes to the LEDs., but a re-boot could, I suppose.
When a drive is syncing, the access blinking can be so fast that it appears solid. The Volumes page should indicate if any syncing is still ongoing. mdstat.log in the log .zip file will show you a bit more about the status (or issuing cat /proc/mdstat from SSH)..
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