DD9500 Disk Absent

based on the very old and unsupported DDOS version, I reckon this is in no way supported by anyone, so not even by a 3rd party that only handles hardware support?

What would you be able to do besides maybe rebooting (or power down and up again) the unit and hoping for the best? Do the original drives work in other disk slots as that might point to an issue with the two disk slots. What was tested or ruled out?

With array shutting down you (only) mean the disk array (enclosure) that has these two possible affected drive slots? any more arrays that work fine? nothing reported by the array wrg to error states? what does cli say what the hardware status is from all components or what the alert messages are from the DD?

what state is shown for all disks? and their individual info?

disk show state

disk show hardware

what kinda enclosures?

enclosure show summary

Hi

Thank for the reponse

VERSION=Data Domain OS 6.1.1.30-606367

Disk Show Hardware
------------------
Disk         Slot   Manufacturer/Model                         Firmware   Serial No.                 Capacity     Type    
(enc/disk)                                                                                                                
----------   ----   ----------------------------------------   --------   ------------------------   ----------   --------
1.1          0      TG32C10400GA3EMC_______________118000371   PRO6E344   FG00FX11                   372.61 GiB   SATA-SSD
1.2          1      TG32C10400GA3EMC_______________118000371   PRO6E344   FG00FWRG                   372.61 GiB   SATA-SSD
1.3          2      (absent)                                   (absent)   (absent)                   (absent)     (absent)
1.4          3      (absent)                                   (absent)   (absent)                   (absent)     (absent)

All disk Enclosure 2 and 3 this OK

Disk Show State
-----------------
Enclosure   Disk                                          
             1  2  3  4  5  6  7  8  9  10 11 12 13 14 15 
---------   ----------------------------------------------
1            .  .  A  A                                   
2            .  .  .  .  .  s  .  .  .  .  .  .  .  .  .  
3            .  .  .  .  .  .  .  .  .  s  .  .  .  .  .  

Enclosure Show Summary
----------------------
Enclosure   Model No.   Serial No.       State    OEM Name   OEM Value   Capacity
---------   ---------   --------------   ------   --------   ---------   --------
1           DD9500      NVTxxxxxxxxxxx   Online                          4 Slots 
2           ES30        CKM00xxxxxxxxx   Online                          15 Slots
3           ES30        CKM00xxxxxxxxx   Online                          15 Slots

Do the original drives work in other disk slots as that might point to an issue with the two disk slots.

- No slot free 

The Absent disk state indicates that the disk is disconnected from the bus and is inaccessible, similar to a drive being physically removed from the system. Disks in this state cannot be failed or unfailed.

1. Verify Disk Availability: Run the command disk show hardware. The output for the suspected drive should be blank or show as Absent.
2. Reset Disk State:
   • Remove the disk.
   • Wait for five minutes.
   • Reinsert the disk.
   • After a system rescan, the output typically shows the disk state as Spare.

If the issue persists, there may be a problem with the slot on the enclosure or the head unit. In such cases, contact Data Domain Support for further assistance.

See also https://www.dell.com/support/kbdoc/en-us/000043773/76684-disk-drive-in-failed-state?lang=en

which states amongst other things:

Replace the failed disk:

1. See relevant documented disk replacement procedures 
   • Tip: Best practice for replacing disk drives should include a one minute waiting period from the time a drive is removed until the new drive is inserted.
     • For example, remove the failed disk, wait one minute and then insert the new disk.
       • This allows the controller firmware to properly remove the old drive before the new drive is inserted, greatly reducing the possibility of a hotplug issue where the new drive is not properly recognized.
2. Verify that the drive is in a SPARE state after replacement.

• From DD-CLI # disk show state

So did you by any chance maybe replace the disks too fast with eachother?

https://www.dell.com/support/kbdoc/en-us/000021916/1004-disk-state-description

Hi,
Yes, I have access to the knowledge base.
I have already followed these procedures, but the result is still the same.
The disks are still missing.
Is there a Linux layer solution outside of DDOS to check this?
Or is there a command to turn the port back on?