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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...
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.
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.
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