Replacement disk RR4360S

[ravi926]

There is a disk which is going to fail (Detected increasing reallocated sector count), Do need to shutdown the system RR4360S and swap the drive or are the drives hot swappable ?

[StephenB]

---

@ravi926 wrote:

are the drives hot swappable ?

---

The drives are hot swappable.

[ravi926]

Thanks, just curious to know during what situation we need to shutdown the array and replace, have read from one of the forums https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/Dead-volume-after-disc-replacement/...

[StephenB]

---

@ravi926 wrote:

Thanks, just curious to know during what situation we need to shutdown the array and replace, have read from one of the forums https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/Dead-volume-after-disc-replacement/...

---

Normally you don't (fwiw I never have).

What RAID mode are you using for the volume the failing disk is in?

[Sandshark]

The post you referenced has nothing to do with whether or not the NAS was shut down.  No matter how you do it (power on or off), a replacement drive has to complete RAID sync.  Depending on the RAID type, other failures during that process can kill the volume.

[StephenB]

---

@Sandshark wrote:

The post you referenced has nothing to do with whether or not the NAS was shut down.  No matter how you do it (power on or off), a replacement drive has to complete RAID sync.  Depending on the RAID type, other failures during that process can kill the volume.

---

You are assuming RAID redundancy - hopefully @ravi926's volume has that, but I thought it was worth confirming. 

[ravi926]

RAID 60 is configured.

[StephenB]

---

@ravi926 wrote:

RAID 60 is configured.

---

So lots of RAID redundancy (you can lose up to two disks in every RAID-6 stripe with no data loss).

I don't recommend the cloning procedure you linked in earlier in your situation.  The problem with cloning a failing disk is that any bad sectors on the original end up as good sectors on the clone (but with bad data).  That can lead to volume corruption, since RAID cannot reconstruct the data.