Hello,

we have multiple Debian servers with an adaptec RAID controller.
Two harddisks - RAID 1

Those harddisks usually show up as
/dev/sg1 and /dev/sg2 with the controller being /dev/sg0

lsscsi -g
[0:0:0:0] disk Adaptec Raid-1 V1.0 /dev/sda /dev/sg0
[0:1:0:0] disk SEAGATE ST300MP0006 N004 - /dev/sg1
[0:1:1:0] disk SEAGATE ST600MP0136 C004 - /dev/sg2

So I can use
smartctl -a /dev/sg1
and get the "Elements in grown defect list: 0"
And I would like to see that value.

On the latest server there is no /dev/sg1 or /dev/sg2 showing up.
I've compared the RAID settings but I can't find what might be different.

Does anybody have an idea what else could have gone wrong or which settings I could check?

If the new server is running a different kernel configuration, then perhaps SCSI Generic support is compiled as a module.

Try sudo modprobe sg and see what happens.

no change

# lsmod | grep sg
ipmi_msghandler 118784 1 ipmi_devintf
sg 36864 0
scsi_mod 270336 3 aacraid,sd_mod,sg

I've found
https://www.thomas-krenn.com/de/wiki...AID_Controller

It says if the disks aren't visible set the option expose_physicals of the aacraid driver to -1.

How do I do that?

systool -v -m aacraid
shows expose_physicals as -1

also
/sys/module/aacraid/parameters/expose_physicals
-1

I've found a message somewhere saying that -1 doesn't work any more, and he had to set it to 1, but whatever I try it shows up as -1

I think I've found what I've been looking for:

I edited
/etc/initramfs-tools/modules

and put
options aacraid expose_physicals=1
in there.

ran
update-intramfs -u
and
reboot

Now it shows up as 1 and now there are
/dev/sg1 and /dev/sg2
showing up.