Always panic for Ipod 6th gen

[WWWXXX]

Hi all,

I am new here and just get a modified iPod 6th gen , with RB version 7d11205-140918 (not sure how old this is, could be pretty old).
After playing a while I got a panic message like below:
        "*PANIC*
        dc_writeback_callback () - Could not write sector 2
        ...."
Then I have to force restarting it, it is ok to go to boot manual, however once I start RB and try to play songs or change settings, same message would pop again (different sectors of course).

I had a chance to check system info which shows 0bytes for caches, could this be the root of this issue?
Or should I update to a newer version? The problem is if I am trying to connect to my PC in RB, same message. Is there a way I can update manually without go into RB?
Or is this because the SSD was corrupted? Oh, yes it was replaced version.

Many thanks for your help.

[saratoga]

The write to disk failed, which sounds bad.

Does the apple firmware work with the ssd?

[WWWXXX]

The write to disk failed, which sounds bad.

Does the apple firmware work with the ssd?

When I get it, it was already installed RB so I am not sure how apple firmware works on it :-(

[WWWXXX]

I guess the SSD is dead...
This was happening few weeks ago, then magically came back someday, that why I feel so wired.

[daiyan]

I am sure that my ssd is good but have same problem.
When I powered my ipc it show this *panic* just seconds without any action.