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Forum Discussion
HDD Replacement - Expected Rebuild Time
Hi,
I have a Netgear Utlra 6 with 5x2TB drives and 1x3TB drive. I removed one of my 2TB drives and then replaced it with a brand new 3TB drive. The rebuild has started but has been going for 3 days with me not knowing what is going on. Everything still work fine, I guess, the last msgs in the log is as follows:
Wed Jun 13 23:21:30 Data volume will be rebuilt with disk 1.
Wed Jun 13 23:19:16 New disk detected. If multiple disks have been added, they will be processed one at a time. Please do not remove any added disk(s) during this time. [Disk 1]
Wed Jun 13 23:15:59If the failed disk is used in a RAID level 1, 5, or X-RAID volume, please note that volume is now unprotected, and an additional disk failure may render that volume dead. If this disk is a part of a RAID 6 volume, your volume is still protected if this is your first failure. A 2nd disk failure will make your volume unprotected. If this disk is a part of a RAID 10 volume,your volume is still protected if more than half of the disks alive. But another failure of disks been marked may render that volume dead. It is recommended that you replace the failed disk as soon as possible to maintain optimal protection of your volume.
Wed Jun 13 23:15:59 Disk failure detected.
Wed Jun 13 23:15:34 A disk was removed from the ReadyNAS.
Wed Jun 13 23:15:34 Disk removal detected. [Disk 1]
It is now Saturday 23:53:00. I know that the rebuild would take a long time, but this seems excessive. Is there any way to check how the rebuild is going, and/or if perhaps something has gone astray and perhaps I need to intervene?
Thanks
I have a Netgear Utlra 6 with 5x2TB drives and 1x3TB drive. I removed one of my 2TB drives and then replaced it with a brand new 3TB drive. The rebuild has started but has been going for 3 days with me not knowing what is going on. Everything still work fine, I guess, the last msgs in the log is as follows:
Wed Jun 13 23:21:30 Data volume will be rebuilt with disk 1.
Wed Jun 13 23:19:16 New disk detected. If multiple disks have been added, they will be processed one at a time. Please do not remove any added disk(s) during this time. [Disk 1]
Wed Jun 13 23:15:59If the failed disk is used in a RAID level 1, 5, or X-RAID volume, please note that volume is now unprotected, and an additional disk failure may render that volume dead. If this disk is a part of a RAID 6 volume, your volume is still protected if this is your first failure. A 2nd disk failure will make your volume unprotected. If this disk is a part of a RAID 10 volume,your volume is still protected if more than half of the disks alive. But another failure of disks been marked may render that volume dead. It is recommended that you replace the failed disk as soon as possible to maintain optimal protection of your volume.
Wed Jun 13 23:15:59 Disk failure detected.
Wed Jun 13 23:15:34 A disk was removed from the ReadyNAS.
Wed Jun 13 23:15:34 Disk removal detected. [Disk 1]
It is now Saturday 23:53:00. I know that the rebuild would take a long time, but this seems excessive. Is there any way to check how the rebuild is going, and/or if perhaps something has gone astray and perhaps I need to intervene?
Thanks
17 Replies
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quazi_dude wrote: I have never completed a factory restore. I purchased this in Nov-2011 and first installed 5 x 2TB drives. I only installed the 2 x 3TB in last week. I am not familiar with the restrictions of online expansion, didn't realise there were any, but does mean I cannot expand beyond 10TB of "actual" available space or "theoretical" (5 x 2TB HDDs) space?
What disks were in the NAS when you initially set it up? Or in other words did you install all 5 disks at once? If so, then you would've started out with e.g. 7.3TB of space (not sure what the exact figure would be) which would allow you to expand 8TB further to 15.3TB.quazi_dude wrote:
I am running Radiator v4.2.19 and noticed the latest version available from the system update is v4.2.20, (v4.2.21 from direct download - not sure why this is different)
The update server hasn't been updated yet with the new firmware. 4.2.21 is the latest.quazi_dude wrote:
but didn't want to start messing with firmware since everything is currently working fine and I don't have backups of my data if something goes wrong. I was under the impression that my version of firmware is able cater for 3 TB drives.
Yes it should work fine on that firmware.quazi_dude wrote:
Do you think this might be causing my volumes not to expand, or perhaps the issue mentioned previously?
The online expansion issue would be what I'd first suspect assuming you put one disk in, then powered on and added the other disks later.
Edit: beaten.- Ok, thanks guys, I'm pretty sure you nailed it. I started with only 1 x 2TB drive and then added drives from there. I'm confident the issues now are due to the online expansion problem. I guess I will just need to remove data from the NAS, and to a factory restore with more drives already in it and go from there.
But it is slightly concerning how many people here have lost data on these boxes. The primary reason for purchasing this was for data redundancy in case a drive fails (and to get away from Windows home server and it's unreliability). But I guess there is no such thing as full redundancy, well, not if your on a budget anyways :)
Thanks everyone for your help. - Naturally users who have problems are more likely to post than those who do not. I've found all of my ReadyNAS units to be highly reliable.
No RAID is a replacement for backing up data. RAID provides redundancy/high-availability. There are a range of problems that it cannot protect against.
Important data primarily stored on the ReadyNAS should be backed up regularly. See Preventing Catastrophic Data Loss - quazi_dude, in my humble opinion, these units are very reliable. Several months ago, I rehomed a 5 year old NV+ by giving it to a friend. He is very pleased with it. I have two 4 bay NVX units that are now two years old, and while I had some start up problems with the first due to a non compatible third party switch in the network, they have operated flawlessly. I do not include the drives in that as I have had a few fail in the past two years, as compared to only a single drive failure in the first three years. After all, Netgear does not make the drives.
I joined the lost data club decades ago when everything was on a single drive in a single PC. I learned my lesson and have not been without a viable backup since, especially since I am more vulnerable to failure now that everything in on the computer with few hard copies. I pointed out that I had two NAS units, one is the primary and the other is the backup. In addition, I maintain an offsite backup of all my critical/important information (financial data, photos, etc). Videos and music not included as I do not consider that important, just nice to have. I can always go back to the DVDs and CDs. - I've also found the units to be solid (I have three at the moment, a duo v1, and NV+ v1 and a Pro 6).
The weakest link are the drives - partly because of the sheer number of them. If you have 6 drives in your ultra, and drives last on average of 5 years (thereabouts), then you can expect to have about one drive failure a year over the long term. If you have a lot of data that is only rarely read, then a bad sector can go for a long time without being noticed. So when you do get a detected drive failure, RAID might not enough. The Ultra's disk scrubbing feature is nice, as it lets you check the whole volume for data integrity on a schedule.
Like PapaBear my membership in the lost data club started long before I had a NAS. I haven't lost files due to drive failures in a long time, though I have needed to restore my Duo from backup once. - I've been pretty vigilant and haven't yet lost any data and am kind of glad not to have joined the "exclusive" club yet :) I guess I would just like to keep it that way by keeping on top of things as much as I can. I swap drives out at least every 2-3 years and I have been slowly replacing my 2TB drives with 3TBs now.
But appreciate all the help guys, I think the next solution would perhaps be to buy an extra 4 bay drive to back up the 6 bay, just in case.
It think offsite storage for photos and important doccos on a portable HDD will also now be done.
Thanks. - We also would like you to never join "our" club.
I am still amazed at the number of people who have years of digital photos of their family, especially baby photos on their PC hard drive and never back them up. Sometimes, I feel like a voice in the wilderness, because I know what can happen. Fortunately it happened to me when photos were on paper in albums and most critical documents on paper in a file. But they are not the only ones.
Here is a link to an article submitted by D. Bott, a major contributor to this forum. I have learned a lot from his articles over the years.
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