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Forum Discussion
1 disk with data to second RAID1
Hi everybody, I have a netgear ultra4 and received two hard disks with it but one of them was broken and i returned it to the seller, waiting for the new one. I put one disk inside the no1 slot ...
Having an on hand spare is a good idea. Under Murphy's law, if you have the spare, you probably won't need it, but if you don't, you will.
Hot adding the second drive is definitely the way to go as TeknoJnky said. Some mistakenly think that RAID is a backup, but it is not. It is a way to normally survive a disk failure without losing data. However, in some cases, if you have a second disk that has problems, but not severe enough yet to cause a disk failure or throw errors, they are more likely to show up when you replace another drive. The resync process is very disk intensive and can run for 10 or more hours in certain circumstances. That stress may cause a weak drive to fail and then you have the dreaded second drive failure which can cause loss of data.
It is not common, but can happen (in almost 5 years with at least one NAS it has never happened to me). However, if it happens to you and you do not have a backup plan, then that is once too often.
When I started out and only had a small amount of data (pre-video days), I would backup up to a USB external drive. Now that I have over 2TB of data and 3 NAS units, external drives are just not suitable. All of my data is on my primary NAS (NVX Business Edition) and an NVX Pioneer is my backup target. I use the Frontview backup jobs and they use rsync to backup up every night (takes just a few minutes to synchronize the same share on both units). My trusty old NV+ which is getting on 5 years old and still is now the second backup of critical data. (It was just sitting around so I put it back to work). I also backup critical and important data periodically to a WD Passort and take it to my safety deposit box and swap with the one that is in there. (While we don't have tornadoes down here, we are subject to hurricanes and other violent storms). It did take me years to get into this position, as it is not an inexpensive option to have two NAS units, but is the best backup option down the road.
Hot adding the second drive is definitely the way to go as TeknoJnky said. Some mistakenly think that RAID is a backup, but it is not. It is a way to normally survive a disk failure without losing data. However, in some cases, if you have a second disk that has problems, but not severe enough yet to cause a disk failure or throw errors, they are more likely to show up when you replace another drive. The resync process is very disk intensive and can run for 10 or more hours in certain circumstances. That stress may cause a weak drive to fail and then you have the dreaded second drive failure which can cause loss of data.
It is not common, but can happen (in almost 5 years with at least one NAS it has never happened to me). However, if it happens to you and you do not have a backup plan, then that is once too often.
When I started out and only had a small amount of data (pre-video days), I would backup up to a USB external drive. Now that I have over 2TB of data and 3 NAS units, external drives are just not suitable. All of my data is on my primary NAS (NVX Business Edition) and an NVX Pioneer is my backup target. I use the Frontview backup jobs and they use rsync to backup up every night (takes just a few minutes to synchronize the same share on both units). My trusty old NV+ which is getting on 5 years old and still is now the second backup of critical data. (It was just sitting around so I put it back to work). I also backup critical and important data periodically to a WD Passort and take it to my safety deposit box and swap with the one that is in there. (While we don't have tornadoes down here, we are subject to hurricanes and other violent storms). It did take me years to get into this position, as it is not an inexpensive option to have two NAS units, but is the best backup option down the road.
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