It is currently Thu Nov 26, 2020 10:13 am
All times are UTC + 8 hours

bad block scanning vs. RAID scrubbing

Got a question about our NAS utilities? The answer lies within.

bad block scanning vs. RAID scrubbing

Postby core » Wed Jul 01, 2020 3:45 pm

I have already enabled per disk bad block scanning on a schedule. Now I just noticed I could also run RAID scrubbing. I know they complement each other. But I can't seem to find any discussion of the two together.

I don't want to be doing wasteful work. It seems this should be sufficient:
  • while bad block scanning continues to succeed on my disks, there is no really value in doing periodic RAID scrubbing.
  • if bad block scanning finds a problem, then run RAID scrubbing and as soon as practical replace the failing disk.

Anyone have suggestions?
AS6208T + AS6004U
User avatar
core
 
Posts: 19
Joined: Sat May 16, 2020 5:12 am

Re: bad block scanning vs. RAID scrubbing

Postby Nazar78 » Fri Jul 03, 2020 12:21 am

Scrubbing verifies your data integrity and attempt to correct out of sync parity while badblocks only test sectors individually. You should priorities scrubbing instead, while at it, problematic sectors will also be reported by the system and relocated by modern disks similar to badblocks and smart long test.
AS5304T - 16GB DDR4 - [40TB N300 RAID10 + 5 Bay USB: 8TB RAID5 & 480GB SSD for Apps]
User avatar
Nazar78
 
Posts: 195
Joined: Wed Jul 17, 2019 10:21 pm
Location: Singapore

Return to NAS Utilities

  • You cannot post new topics in this forum
    You cannot reply to topics in this forum
    You cannot edit your posts in this forum
    You cannot delete your posts in this forum
    You cannot post attachments in this forum
  • Who is online

    Users browsing this forum: No registered users and 2 guests

cron