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Readynas 314 adding new hard drives
Hi I had 2x2TB hdds installed in my 314 with RAID1 setup. I wanted to add 2 new hdds with 4TB capasity so I just added two disk in and it started to sync. Now when syncing is ready it shows that ...
StephenB wrote: If you leave it as RAID-5, the volume will expand to 6 TB (5.45 TiB) after you add the two new disks. ...I missed that you were adding 4 TB drives. RAID-6 isn't actually possible (the four largest drives all need to be the same size).
XRAID will give you an 8 TB volume (~7.27 TIB). The capacity rule is "sum the drives and subtract the largest". After the expansion, you'll be able to replace a failing drive with one of the same size, or with one that is larger than 4 TB.
Sandshark gave you the technical explanation of how this works. As he says, you'll end up with a RAID-5 group of 4x2TB (6 TB capacity) and a RAID-1 group of 2x2TB (2 TB capacity). These are concatenated into a a single 8 TB data volume.
XRAID will protect you from routine drive failures (of any of your drives). But RAID in any form isn't enough to keep your data safe - devices (and redundant RAID arrays) can still fail. So if your data matters to you, you do need to back it up onto at least one other device. USB drives are a cost effective way to do that. The array isn't protected during expansion, so I recommend backing up your data before you hot-insert the first new drive.
Sirja wrote:
Now when syncing is ready it shows that now there is RAID5.
How can I make it back to RAID1 (or is't RAID6?). I want to use that about 6TB capasity.
The first question is why you'd want to do that. If you leave it as RAID-5, the volume will expand to 6 TB (5.45 TiB) after you add the two new disks. Two RAID-1 volumes or one RAID-6 volume would give you 4 TB.
StephenB wrote: If you leave it as RAID-5, the volume will expand to 6 TB (5.45 TiB) after you add the two new disks. ...
I missed that you were adding 4 TB drives. RAID-6 isn't actually possible (the four largest drives all need to be the same size).
XRAID will give you an 8 TB volume (~7.27 TIB). The capacity rule is "sum the drives and subtract the largest". After the expansion, you'll be able to replace a failing drive with one of the same size, or with one that is larger than 4 TB.
Sandshark gave you the technical explanation of how this works. As he says, you'll end up with a RAID-5 group of 4x2TB (6 TB capacity) and a RAID-1 group of 2x2TB (2 TB capacity). These are concatenated into a a single 8 TB data volume.
XRAID will protect you from routine drive failures (of any of your drives). But RAID in any form isn't enough to keep your data safe - devices (and redundant RAID arrays) can still fail. So if your data matters to you, you do need to back it up onto at least one other device. USB drives are a cost effective way to do that. The array isn't protected during expansion, so I recommend backing up your data before you hot-insert the first new drive.
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