Why is the zns device on the VM unavailable after I run the run_zns.sh script

[qjyimyy]

The run_zns.sh is:

#!/bin/bash

# Huaicheng Li [email protected]
# Run FEMU as Zoned-Namespace (ZNS) SSDs

# Image directory
IMGDIR=/home/qiaojiyang/images
# Virtual machine disk image
OSIMGF=$IMGDIR/femu.qcow2

if [[ ! -e "$OSIMGF" ]]; then
echo ""
echo "VM disk image couldn't be found ..."
echo "Please prepare a usable VM image and place it as $OSIMGF"
echo "Once VM disk image is ready, please rerun this script again"
echo ""
exit
fi

SSD_SIZE_MB=4096
NUM_CHANNELS=8
NUM_CHIPS_PER_CHANNEL=4
NUM_PLANES_PER_CHIP=2
NUM_BLOCKS_PER_CHIP=32
# SLC:1 MLC:2 TLC:3 QLC:4
# MLC is not allowed
FLASH_TYPE=4

FEMU_OPTIONS="-device femu"
FEMU_OPTIONS=${FEMU_OPTIONS}",devsz_mb=${SSD_SIZE_MB}"
FEMU_OPTIONS=${FEMU_OPTIONS}",namespaces=1"
FEMU_OPTIONS=${FEMU_OPTIONS}",zns_num_ch=${NUM_CHANNELS}"
FEMU_OPTIONS=${FEMU_OPTIONS}",zns_num_lun=${NUM_CHIPS_PER_CHANNEL}"
FEMU_OPTIONS=${FEMU_OPTIONS}",zns_num_plane=${NUM_PLANES_PER_CHIP}"
FEMU_OPTIONS=${FEMU_OPTIONS}",zns_num_blk=${NUM_BLOCKS_PER_CHIP}"
FEMU_OPTIONS=${FEMU_OPTIONS}",zns_flash_type=${FLASH_TYPE}"
FEMU_OPTIONS=${FEMU_OPTIONS}",femu_mode=3"

sudo ./qemu-system-x86_64
-name "FEMU-ZNSSD-VM"
-enable-kvm
-cpu host
-smp 4
-m 4G
-device virtio-scsi-pci,id=scsi0
-device scsi-hd,drive=hd0
-drive file=$OSIMGF,if=none,aio=native,cache=none,format=qcow2,id=hd0
${FEMU_OPTIONS}
-net user,hostfwd=tcp::8081-:22
-net nic,model=virtio
-nographic
-qmp unix:./qmp-sock,server,nowait 2>&1 | tee log

when I start VM, use:
sudo nvme list
I get:
Node SN Model Namespace Usage Format FW Rev

---

/dev/nvme0n1 vZNSSD0 FEMU ZMS-SSD Controller [by Misao] 1 4.29 GB / 4.29 GB 512 B + 0 B 1.0

When I use smartctl -a /dev/nvme0n1, I get:
=== START OF INFORMATION SECTION ===
Model Number: FEMU ZMS-SSD Controller [by Misao]
Serial Number: vZNSSD0
Firmware Version: 1.0
PCI Vendor ID: 0x1d1d
PCI Vendor Subsystem ID: 0x1af4
IEEE OUI Identifier: 0xb30200
Controller ID: 0
NVMe Version: 1.3
Number of Namespaces: 1
Namespace 1 Size/Capacity: 4,294,967,296 [4.29 GB]
Namespace 1 Formatted LBA Size: 512
Local Time is: Fri Nov 8 08:52:42 2024 UTC
Firmware Updates (0x0f): 7 Slots, Slot 1 R/O
Optional Admin Commands (0x0102): Format Drbl_Bf_Cfg
Optional NVM Commands (0x0004): DS_Mngmt
Log Page Attributes (0x07): S/H_per_NS Cmd_Eff_Lg Ext_Get_Lg
Maximum Data Transfer Size: 1024 Pages
Namespace 1 Features (0x14): Dea/Unw_Error NP_Fields

Supported Power States
St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat
0 + 25.00W - - 0 0 0 0 16 4

Supported LBA Sizes (NSID 0x1)
Id Fmt Data Metadt Rel_Perf
0 + 512 0 0
1 - 1024 0 0
2 - 2048 0 0
3 - 4096 0 0
4 - 8192 0 0

=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: FAILED!

• available spare has fallen below threshold

SMART/Health Information (NVMe Log 0x02)
Critical Warning: 0x01
Temperature: 50 Celsius
Available Spare: 0%
Available Spare Threshold: 20%
Percentage Used: 0%
Data Units Read: 0
Data Units Written: 0
Host Read Commands: 0
Host Write Commands: 0
Controller Busy Time: 0
Power Cycles: 0
Power On Hours: 0
Unsafe Shutdowns: 0
Media and Data Integrity Errors: 0
Error Information Log Entries: 0

Error Information (NVMe Log 0x01, 4 of 4 entries)
No Errors Logged

The results were the same whether I used the official image or made my own