Forum Discussion

Prodigy

Jun 09, 2019

Performance during scrub

First off, yes I’ve definitely commented on this in the past. But this time I have context I didn’t have before. In particular, in the past week or so I have replaced three drives (due to increasing r...

Adding Disks

Performance

Sandshark

Sensei

Jun 09, 2019

The kworkers do take up some cpu time and can slow things down, especially on the lower-powered NASes. But it's only when it "bleeds over" to readynsd that I've found the NAS completely unaccessible. But I do only have one ARM based NAS that I only occasionally do testing with, so my experience there is limited.

hmuessig

Luminary

Jun 10, 2019

FWIW, My 314 has been doing a scrub now for almost 36 hours and is completely unresponsive to any attempt to log into it . . . And using either finder (Mac) or Explorer (Windows 10) results in the NAS being unreachable.

OS is 6.10.1, 4 2TB Reds.

StephenB
Guru - Experienced User
Jun 11, 2019
hmuessig wrote:

FWIW, My 314 has been doing a scrub now for almost 36 hours and is completely unresponsive to any attempt to log into it . . . And using either finder (Mac) or Explorer (Windows 10) results in the NAS being unreachable.

OS is 6.10.1, 4 2TB Reds.

This sounds like one of the disks might be failing. Do you have ssh access?
- hmuessig
  Luminary
  Jun 11, 2019
  Good call StephanB! Looks like two drives are failing!
  
  I do have SSH and used smartctl -x /dev/sdx where "x" is "a" through "d" for the four drives.
  
  It would be nice if NetGear had a short tutorial on reading the smartctl report! had to dig a bit to find which attributes are the critical ones and how to interpret the values.
  
  Not a really big deal as this my test NAS. So the two failing drives will get replaced shortly.
  
  Tx!
  - StephenB
    Guru - Experienced User
    Jun 11, 2019
    hmuessig wrote:
    
    It would be nice if NetGear had a short tutorial on reading the smartctl report! had to dig a bit to find which attributes are the critical ones and how to interpret the values.
    
    I agree.
    
    Though I don't think development and support/mods are on the same page (since support routinely suggests replacing disks that don't trigger email alerts). Personally I'm with support - I think the alert thresholds for pending and realllocated sectors are too low.