NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Solved
LUN and Disk
I am creating a LUN. So far, I have connected the LUN to the computer. If I am right, now I need to initialize the LUN and format it. The NAS I have, has two disks, one I can put data on and one for ...
Zunderman wrote:
If I understand you cerrectly, I can make a LUN an initialize it without loosing the data on the disk. Afterwards, I need to format the LUN. Can I do this without the risk loosing the data?
A LUN is a virtual disk. It's just a 25 GB file as far as the RAID array is concerned.
You format the LUN on the PC (or whatever the iSCSI client machine is). That formats the virtual disk (e.g., writes to the 25 GB file), but doesn't affect anything else. The data on the NAS won't be touched.
StephenB wrote:
Ok, so you are running RAID-1, with the disks mirrored. Mirrored disks isn't the same as backup btw. How much free space do you have in the array?
There is around 2.5 TB free space on the disk. For now, I want to know how it works and test it. Because of this 25 GB should be enough.
StephenB wrote:
Normally you just initialize the LUN, and the LUN container file takes space on the RAID array (like any other file). A thick LUN will take the full allocated size right away. A thin LUN can be overallocated - it will grow as you put more files on it. The thick version generally works out better, but if don't have enough space you could make a thin one.
If I understand you cerrectly, I can make a LUN an initialize it without loosing the data on the disk. Afterwards, I need to format the LUN. Can I do this without the risk loosing the data?
For the time being, I don't want to buy new disks or upgrade the NAS. I have this NAS now 3 years and my family and I have used about 150 GB of the 3 TB of space.
Zunderman wrote:
If I understand you cerrectly, I can make a LUN an initialize it without loosing the data on the disk. Afterwards, I need to format the LUN. Can I do this without the risk loosing the data?
A LUN is a virtual disk. It's just a 25 GB file as far as the RAID array is concerned.
You format the LUN on the PC (or whatever the iSCSI client machine is). That formats the virtual disk (e.g., writes to the 25 GB file), but doesn't affect anything else. The data on the NAS won't be touched.
For now I know enough. Thank you a lot!
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
