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ReadyNas RND4000 - Failed Drive - Need to change RAID settings
I recently switched on my NAS after years of it sitting idle, and got the message of a drive malfunctioning. I have 4*2 TB setup; Deleted my movies folder and currently have only 1.6 TB of data which can be easily fit into the 6TB available space. For my RIAD x2, I get the warning that its redundant and disk failure will render the volume dead. My first thought is reconfigure the RAID setting. How do I do that (don't see an option in the readynas admin page or raidar). If there are better options, please suggest. I'm not looking at replacing the failed drive and do not have an external drive to take such a big backup and do a reset. Thanks.
Rajiv_KP wrote:
Its a Readynas ultra 4. Model no is listed as RND-4A and model name is RNDU4000. Firmware is 4.2.31.
As per your comments based on the firmware, I can put in a 3 TB drive?
Yes, but you won't get any space increase until you upgrade a second drive. Though if you are looking for future expansion, I'd consider 4 TB. Good drive choices for your NAS are Seagate Ironwolf and WD Red Plus. Avoid desktop drives and WD Red models - most use SMR technology now, which is not well-suited for RAID.
If you plan on using the NAS for the longer term, then I'd also suggest converting it to OS-6. That would require upgrading the RAM to 2 GB (not difficult), and doing a factory reset (requiring off-loading all the data).
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I'm guessing you have the original NV+ (4.1.x firmware). Is that the case?
Rajiv_KP wrote:
I'm not looking at replacing the failed drive
That is the best solution. A suitable replacement would cost about $75 in the US (either a WD Red Plus or a Seagate Ironwolf). Note you can't use drives larger than 2 TB.
Rajiv_KP wrote:
and do not have an external drive to take such a big backup and do a reset.
Then you are stuck, as you cannot shrink the RAID array from Frontview. Basically you can replace the drive, or do a factory reset with only 3 drives in place. Capacity would be 4 TB if you do the reset. FWIW, a 6TB USB drive would cost about $120 in the US.
It might be possible to shrink the array to 3x2 TB from ssh - but it's not something I've tried to do. There are instructions here for doing that with OS-6 ReadyNAS, but the NV+ is completely different, and those instructions won't work at all with your NAS.
You could of course just live with the degraded volume. When another drive fails you will lose the data (but with no backup you are headed for data loss anyway - just a matter of when).
Rajiv_KP wrote:
Yes, I have the NV+ but with the latest firmware (4.2.31).
Not an NV+ if you are running 4.2.31. The original runs 4.1.x (4.1.16 being the final firmware). The NV+ v2 runs 5.x (5.3.13 being final).
It could be an NVX (RNX4000). Or possibly a Pro, Ultra, or Ultra Plus. It would be good to know, as the NVX cannot be converted to OS-6, but the others can be. Frontview should tell you (as will RAIDar).
However, the answer doesn't change - the only difference is that 4.2 systems can handle disks bigger than 2 TB.
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