Error SD 2:1:0:0 rejecting I/0 to offline device

[didraro]

I have an HP server with 8 ssd intel and my server start to show errors after a time :

SD 2:1:0:0 rejecting I/0 to offline device

 

[wolfgang]

Hi,

do you use an HP smart raid with ZFS?

 

[didraro]

Yes i did . Why ?

 

[wolfgang]

Because this does not work.
Generall ZFS and Ceph are not working properly on raid systems.
You need an HBA card or onboard SATA/SAS controller without write cache.
The problem is that a raid uses an internal cache to improve the write performance. This conflicts with ZFS.
The JBOD mode is also not working.

 

[didraro]

I did used promox 3.4 wit raid 1 of 2 disk and on Openvz was not been any problem.

Even on KVM .

Now wit Promox 5.4 to be this issue ? If i will downgrade to Proxmox 3.4 and use raid 6 of those 8 disc , does will work ? Do i will have any other issue ?

 

[wolfgang]

ZFS and Raid card never worked. But maybe you were lucky.
If you like to use your Raid you can do this with LVM and no issues but not with ZFS.

 

[didraro]

As i see it is already LVM , and it is not ZFS , so what can be the problem ?

 

[wolfgang]

Hardware failure?