Hi everyone, I just got the 31200 (2-bay) and the EDA500 (5-bay) expansion chasis. I was hoping to add 7 disks and set up an XRAID2 volume. I just read some fine print that the eda500 will create a separate volume?!? Is there no way to combine all 7 disks? So in other words I am stuck with a 2 disk volume (1 disk used for mirror) and a 5 disk volume (one disk used for raid5)? I'm about to freak out here.

Blanker wrote: is Kossboss wrong? I believe he was. With xraid, there should a second volume for the eda-500 called eda1. I'm not sure if you can set up a flexraid volume that spans the two chassis or not. Blanker wrote: The way I am looking at it, a raid6 will provide better protection across all 7 disks. I agree. Though if the cable disconnects with the systems running, the results might be unpredictable if you were to configure single volume. If power drops on the EDA but not on the RN312 you might run into trouble.

Blanker wrote: So in other words I am stuck with a 2 disk volume (1 disk used for mirror) and a 5 disk volume (one disk used for raid5)? Yes. Though there is capacity loss, it is more robust than trying to span the RAID volume across two chassis.

hi, thanks for the response, though it seems to be contradictory of this guys post:https://community.netgear.com/t5/New-to-ReadyNAS/Netgear-EDA500/td-p/887978 is Kossboss wrong? The way I am looking at it, a raid6 will provide better protection across all 7 disks. Especially in the case of a drive failure, and then an URE while the array is rebuilding.

I am fooling around with it as we speak. It appears that with flexraid I can create a 7-disk volume that spans both chasis. I just need to confirm that there is ZERO way to do this with xraid.

XRAID is automatic, so I don't see how you could set it up with XRAID enabled. You might be able to re-enable XRAID after the volume is created.

EDA500 Expansion chasis + RN312= combine volumes for XRAID2?

14 Replies

StephenB
Guru
Apr 04, 2017
Blanker wrote:

So in other words I am stuck with a 2 disk volume (1 disk used for mirror) and a 5 disk volume (one disk used for raid5)?

Yes.

Though there is capacity loss, it is more robust than trying to span the RAID volume across two chassis.
- Blanker
  Aspirant
  Apr 04, 2017
  hi, thanks for the response, though it seems to be contradictory of this guys post:
  https://community.netgear.com/t5/New-to-ReadyNAS/Netgear-EDA500/td-p/887978
  
  is Kossboss wrong?
  
  The way I am looking at it, a raid6 will provide better protection across all 7 disks. Especially in the case of a drive failure, and then an URE while the array is rebuilding.
  - StephenB
    Guru
    Apr 04, 2017
    Blanker wrote:
    
    is Kossboss wrong?
    
    I believe he was. With xraid, there should a second volume for the eda-500 called eda1. I'm not sure if you can set up a flexraid volume that spans the two chassis or not.
    
    Blanker wrote:
    
    The way I am looking at it, a raid6 will provide better protection across all 7 disks.
    
    I agree.
    
    Though if the cable disconnects with the systems running, the results might be unpredictable if you were to configure single volume. If power drops on the EDA but not on the RN312 you might run into trouble.
jak0lantash
Mentor
Apr 07, 2017
£1600 on amazon.co.uk right now! And no, I didn't add too many zeros! The magic of the marketplace ^^
It's true that Synology market their expansion chassis more aggressively than NETGEAR. For instance, the model number contains the maximum of number of bays with expansion chassis instead of just main chassis (DS916+ is a 4 bays that supports 9 bays max with expansion).

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EDA500 Expansion chasis + RN312= combine volumes for XRAID2?

14 Replies

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