[PVE-User] Tape Drive Pass Through into PBS VM

[Samuel Lorch]

On 26.07.2021 11:06, Dominik Csapak wrote:
> On 7/26/21 10:50 AM, Samuel Lorch wrote:
>> Hello,
>> 
>> i Have been trying to pass through a TC-L52BN LTO 5 Tape Drive from 
>> Quantum that's connected to a MegaRaid SAS 1068 LSI Raid Card, this 
>> setup works if i have a bare metal installed Proxmox Backup Server. I 
>> Have IOMMU Enabled on the Proxmox Host and Passed through the Raid 
>> Card to the VM. I can Also see the Raid Card With "lspci" from inside 
>> the VM but the "proxmox-tape drive scan" command and the UI can't seem 
>> to find it. Is there Any Additional Setup i have to do / any 
>> Troubleshooting steps i could follow?
>> 
>> Thanks,
>> Samuel
>> 
> 
> Hi,
> 
> did not try such a setup myself, but is the passthrough properly
> working? I.e. do you see any other disks that are connected?
> 
> Is the correct driver loaded for the raid card?
> 
> Also what does 'dmesg' show?
> 
> kind regards
> Dominik

Hi,

unfortunately this raid controller only has external ports and i don't 
have a adapter to directly attach a drive.

The driver seems to load correctly according to dmesg, here are some 
parts i believe are related, if there are any that i missed please ask:

[    2.179335] megasas: 07.714.04.00-rc1
[    2.181559] megaraid_sas 0000:06:10.0: BAR:0x0  BAR's 
base_addr(phys):0x00000000c1620000  mapped virt_addr:0x(____ptrval____)
[    2.181575] i801_smbus 0000:00:1f.3: Enabling SMBus device
[    2.181584] megaraid_sas 0000:06:10.0: Waiting for FW to come to 
ready state
...
[   34.777774] megaraid_sas 0000:06:10.0: FW now in Ready state
[   34.777799] megaraid_sas 0000:06:10.0: 63 bit DMA mask and 32 bit 
consistent mask
[   34.778149] megaraid_sas 0000:06:10.0: current msix/online cpus      
: (0/4)
[   34.778153] megaraid_sas 0000:06:10.0: RDPQ mode     : (disabled)
[   34.861766] megaraid_sas 0000:06:10.0: controller type       : 
MR(256MB)
[   34.861769] megaraid_sas 0000:06:10.0: Online Controller Reset(OCR)  
: Enabled
[   34.861771] megaraid_sas 0000:06:10.0: Secure JBOD support   : No
[   34.861773] megaraid_sas 0000:06:10.0: NVMe passthru support : No
[   34.861774] megaraid_sas 0000:06:10.0: FW provided TM TaskAbort/Reset 
timeout        : 0 secs/0 secs
[   34.861776] megaraid_sas 0000:06:10.0: JBOD sequence map support     
: No
[   34.861778] megaraid_sas 0000:06:10.0: PCI Lane Margining support    
: No
[   34.861780] megaraid_sas 0000:06:10.0: megasas_init_mfi: 
fw_support_ieee=0
[   34.861917] megaraid_sas 0000:06:10.0: INIT adapter done
[   34.861920] megaraid_sas 0000:06:10.0: JBOD sequence map is disabled 
megasas_setup_jbod_map 5707
[   34.861939] megaraid_sas 0000:06:10.0: MR_DCMD_PD_LIST_QUERY not 
supported by firmware
[   34.861976] megaraid_sas 0000:06:10.0: fw state:c0000000
[   34.861979] megaraid_sas 0000:06:10.0: fwstate:c0000000, dis_OCR=0
[   34.889759] megaraid_sas 0000:06:10.0: DCMD not supported by firmware 
- megasas_ld_list_query 4829
[   34.917783] megaraid_sas 0000:06:10.0: pci id                : 
(0x1000)/(0x0411)/(0x1000)/(0x1002)
[   34.917787] megaraid_sas 0000:06:10.0: unevenspan support    : no
[   34.917788] megaraid_sas 0000:06:10.0: firmware crash dump   : no
[   34.917789] megaraid_sas 0000:06:10.0: JBOD sequence map     : 
disabled
[   34.917794] megaraid_sas 0000:06:10.0: Max firmware commands: 1007 
shared with nr_hw_queues = 1
[   34.917806] scsi host0: Avago SAS based MegaRAID driver
...
[   36.300625] iscsi: registered transport (tcp)
...
[   36.336130] iscsi: registered transport (iser)
...
[  107.713269] megaraid_sas 0000:06:10.0: MR_DCMD_PD_LIST_QUERY not 
supported by firmware

Note: Before on the PBS that was installed on Hardware i could only get 
the Drive to show up if the Drive was powered up and plugged in before 
starting the Backup Server, Could this be Causing Issues?

regards
Samuel