Re: zfs (?) issues?

On Sat, Apr 26, 2025 at 03:01:01PM +0300, Sulev-Madis Silber wrote:
>
>that might be it!? there is hdd on machine that was tested but now 
>never really likes to complete the long smart tests, and short take ages. 
>there are no "usual" disk errors, tho. that hdd is part of 2 disk mirror 
>that the git runs on

These are exactly the symptoms that led me to junk 2x HDs. One was CMR 
the other SMR. Smart tests failing to execute normally is a sure sign 
it's hardware.

>i'm wondering why noone else spots it much, tho? 

maybe they do but in the end attribute it to hardware

>and this is not fixed on current either? and fix is in zfs? and ufs, 
>as tested by others, would not be affected... why? 

I've also seen the same thing happen in a microSD and a USB2/3 context,
both were UFS2 not ZFS.

>tl;dr - suspected issue of zfs on slow device filling up *entire* 
>ram with write buffers, leaving userland killed and system in unusable 
>state

Going by what you've described here, I'd say the problem is down to hardware.
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