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 - Experienced User

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 11, 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.