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ReadyNAS 204 one disk's space is not shown
I have bought a new ReadyNAS204 and 2 SATA 3TB disks. The disks could be found in admin page but the space is not correct. It's now 1.59TB free of 2.72TB. It seems lost the other 3TB. Any suggest...
Leia wrote:
But there's no data redundancy for RAID 0. So if one of your drive got failed, all your data would be lost.
I want to emphasize that when either drive fails you lose all the data on both drives. You can also create two volumes (one for each drive) which is a lot safer.
Leia wrote:
Actually if you get one more 3TB drive(must be 3TB at least), and still on XRAID mode, hot-insert the new 3TB drive into your box, you would have a 6TB RAID 5 volume then. RAID 5 volume also has redundancy.
This is generally the best configuration for most users. Fot the extra ~$100 US you get the ability to recover from single disk failures with no need to restore files, and also have the ability to expand the array with no need to restore files from backup.
You will still need a backup though, as RAID alone is not enough to keep your data safe.
By default, the ReadyNAS builds a RAID1 on the two HDDs. That's the capacity of one gone (for redundancy).
Then 3TB minus a few GB for OS and swap, minus conversion from TB to TiB, and you get from 3TB advertised by manufacturer to 2.72TB displayed (TiB).
Then 3TB minus a few GB for OS and swap, minus conversion from TB to TiB, and you get from 3TB advertised by manufacturer to 2.72TB displayed (TiB).
Thanks!
And is it possible for me the remove the RAID1 and use the whole capacity?
If you disable "X-RAID" mode, and destory the volume and create a new volume with the 2 drives as RAID 0, you can get about 6TB free capacity. But there's no data redundancy for RAID 0. So if one of your drive got failed, all your data would be lost.
Actually if you get one more 3TB drive(must be 3TB at least), and still on XRAID mode, hot-insert the new 3TB drive into your box, you would have a 6TB RAID 5 volume then. RAID 5 volume also has redundancy.
Leia wrote:
But there's no data redundancy for RAID 0. So if one of your drive got failed, all your data would be lost.
I want to emphasize that when either drive fails you lose all the data on both drives. You can also create two volumes (one for each drive) which is a lot safer.
Leia wrote:
Actually if you get one more 3TB drive(must be 3TB at least), and still on XRAID mode, hot-insert the new 3TB drive into your box, you would have a 6TB RAID 5 volume then. RAID 5 volume also has redundancy.
This is generally the best configuration for most users. Fot the extra ~$100 US you get the ability to recover from single disk failures with no need to restore files, and also have the ability to expand the array with no need to restore files from backup.
You will still need a backup though, as RAID alone is not enough to keep your data safe.
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