UEFI SAN Boot fails with ONTAP ASA

Applies to

• Host servers using UEFI BIOS for SAN boot
• ONTAP ASA running 9.13.1 or earlier
• Protocols
  • FCP
  • iSCSI

Issue

• SAN Boot OS installation using UEFI BIOS fails against ONTAP ASA target.
• ONTAP EMS logs illegal transfer length errors and invalid_len & INVALID_FIELD_CDB counters increment in the respective ONTAP ASA boot LUN stats during this SAN boot OS installation failure.

::> set -rows 0; event log show -node local -message-name scsiblade.illegal.xfer.len
Time Node Severity Event
------------------- ---------------- ------------- ---------------------------
2/24/2023 05:37:06 a400-01a ERROR scsiblade.illegal.xfer.len: Returned Illegal Request response to host type WINDOWS for command opcode 0x28 with a transfer length of 1441792 bytes on LUN 81K94$UD5IpS.
 

::*> set -privilege diagnostic

::*> statistics show -sample-id windows_sanboot

Object: lun
Instance: /vol/vol_winboot_uefi/winboot
Start-time: 2/24/2023 05:39:35
End-time: 2/24/2023 06:02:09

...
invalid_len 97 <<<<

...
task_errors_hist -
TASK_ERR_NONE 88
TASK_ERR_INVALID_CDB_FIELD 97 <<<<
SCSI_UA_POR 2