3.x-4.x bad blocks detection bug?

Hardware MikroTik hardware general
1

This goes after i detected 4 bad-blocks on my brand new 450G(3 days!),i’ve tried to :

  • Format Nand->NetInstall RouterOS 3.3->Detected 4 Bad Blocks Persist
  • Without Format Nand->NetInstall RouterOS 3.3->Detected 4 Bad Blocks Persist
  • Format Nand->NetInstall RouterOS 4.8->Detected 4 Bad Blocks Persist
  • Without Format Nand->NetInstall RouterOS 4.8->Detected 4 Bad Blocks Persist
  • Format Nand->NetInstall RouterOS 4.9->Detected 4 Bad Blocks Persist
  • Without Format Nand->NetInstall RouterOS 4.9->Detected 4 Bad Blocks Persist

Sample 4.9 Output :

         uptime: 36s
                  version: "4.9"
              free-memory: 246160kB
             total-memory: 257356kB
                      cpu: "MIPS 24K V7.4"
                cpu-count: 1
            cpu-frequency: 680MHz
                 cpu-load: 2
           free-hdd-space: 482072kB
          total-hdd-space: 520192kB
  write-sect-since-reboot: 406
         write-sect-total: 4466
               [b]bad-blocks: 4[/b]
        architecture-name: "mipsbe"
               board-name: "RB450G"
                 platform: "MikroTik"

Those is what i’ve done to narrow down near good solution to reduce bad blocks,why i said it’s a bug between 3.x-4.x RouterOS?,because it come differently on 5.0beta2,it’s really 0!

      uptime: 41s
                  version: "5.0beta2"
              free-memory: 245212kB
             total-memory: 256760kB
                      cpu: "MIPS 24Kc V7.4"
                cpu-count: 1
            cpu-frequency: 680MHz
                 cpu-load: 15
           free-hdd-space: 485876kB
          total-hdd-space: 520192kB
  write-sect-since-reboot: 0
         write-sect-total: 4692
               [b]bad-blocks: 0[/b]
        architecture-name: "mipsbe"
               board-name: "RB450G"
                 platform: "MikroTik"

I don’t know if Bad-Block detection/management already completed on 5.0beta2,but this bad block really quite irritated me as in my places it’s really hard to find stable electricity output and constant electricity blackout overtime :frowning:,i just don’t want for long term i need to invest another one.

2

You shouldn’t worry about those 4 bad blocks. However i have noticed that bug on ROS5.0beta 1 and 2 on my RB750G too. The bad block counter goes to 0 without netinstall and there’s another thing that i’ve noticed : write-sect-total counter doesn’t increase also. Waiting for an official comment on this.

Best regards

3

even 99 bad blocks doesn’t affect anything in your RB450 (or any other RB). RouterOS is smart enough to ignore them, and that is such a small number of data that you won’t feel difference in storage also .

4

roger that comrade :slight_smile: