[Bug 2146621] [NEW] [Dell Ubuntu 26.04]: iSCSI LUN is not detected as a boot LUN or a data LUN

Private bug reported:

Description:
When installing Ubuntu Server 26.04 on a remote iSCSI LUN, the installer fails to detect the remote iSCSI LUN. After installing Ubuntu 26.04 on a local disk and booting into the OS, the remote iSCSI disk is still not detected.

Reproduce Steps:
Boot LUN issue:
1. Attach the Ubuntu Server 26.04 installation image to a Dell PowerEdge R750xs system.
2. Boot from the image and proceed with the installation.
3. During installation, the remote iSCSI LUN is not detected and therefore cannot be selected as a boot LUN.
Data LUN issue:
1. Install Ubuntu Server 26.04 on a local disk on the Dell PowerEdge R750xs system.
2. Boot the system into the installed OS.
3. The remote iSCSI LUN is not detected and does not appear in the output of lsblk.

Configuration:
System: Dell PowerEdge R750xs
OS:https://cdimage.ubuntu.com/ubuntu-server/daily-live/current/resolute-live-server-amd64.iso
NIC adapter: Mellanox ConnectX-6 Dx Dual Port 100GbE QSFP56 Adapter
storage：PowerStore

Expected results:
OS is able to recognize and access the remote iscsi disk

Actual results:
OS fails to detect the remote iscsi disk.

** Affects: linux (Ubuntu)
Importance: Undecided
Status: New

** Information type changed from Public to Private

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https://bugs.launchpad.net/bugs/2146621

Title:
[Dell Ubuntu 26.04]: iSCSI LUN is not detected as a boot LUN or a data
LUN

Status in linux package in Ubuntu:
New

Bug description:
Description:
When installing Ubuntu Server 26.04 on a remote iSCSI LUN, the installer fails to detect the remote iSCSI LUN. After installing Ubuntu 26.04 on a local disk and booting into the OS, the remote iSCSI disk is still not detected.

Reproduce Steps:
Boot LUN issue:
1. Attach the Ubuntu Server 26.04 installation image to a Dell PowerEdge R750xs system.
2. Boot from the image and proceed with the installation.
3. During installation, the remote iSCSI LUN is not detected and therefore cannot be selected as a boot LUN.
Data LUN issue:
1. Install Ubuntu Server 26.04 on a local disk on the Dell PowerEdge R750xs system.
2. Boot the system into the installed OS.
3. The remote iSCSI LUN is not detected and does not appear in the output of lsblk.

Configuration:
System: Dell PowerEdge R750xs
OS:https://cdimage.ubuntu.com/ubuntu-server/daily-live/current/resolute-live-server-amd64.iso
NIC adapter: Mellanox ConnectX-6 Dx Dual Port 100GbE QSFP56 Adapter
storage：PowerStore

Expected results:
OS is able to recognize and access the remote iscsi disk

Actual results:
OS fails to detect the remote iscsi disk.

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