[SOLVED] Seeking Help: How to Improve Slow Transfer Speeds in SATA3 Direct Hard Disk Pass-through on Virtual Machine?

[csz.net]

The hardware conditions are: hard disk SATA3, cable SATA3, and the motherboard supports SATA3.

In the PVE host machine, it shows:

[ 1.769471] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)

In the virtual machine with direct hard disk pass-through, it shows:

[ 2.006282] ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 300)


The actual transfer speed also cannot exceed 30MB/s. Can you tell me what to do?

 

[leesteken]

Try para-virtualized VirtIO SCSI instead of emulated SATA. Please share the VM configuration file.

 

[csz.net]

Try para-virtualized VirtIO SCSI instead of emulated SATA. Please share the VM configuration file.

This is my configuration, thank you for your reply.

 

[leesteken]

View attachment 53281
This is my configuration, thank you for your reply.

Try using VirtIO SCSI (Single) instead of SATA.Please share the VM configuration file (or qm config VM_NUMER) instead of screenshots.

 

[csz.net]

Try using VirtIO SCSI (Single) instead of SATA.Please share the VM configuration file (or qm config VM_NUMER) instead of screenshots.

here

boot: order=scsi0;ide2 cores: 2 ide2: local:iso/ubuntu-22.04.2-live-server-amd64.iso,media=cdrom,size=1929660K memory: 2048 meta: creation-qemu=7.2.0,ctime=1689519703 name: ubuntu-nas net0: virtio=DE:B9:24:1F:9C:75,bridge=vmbr0,firewall=1 numa: 0 onboot: 1 ostype: l26 sata1: /dev/disk/by-id/ata-ST4000VX015-3CU104_WW610899,size=3907018584K scsi0: local-lvm:vm-100-disk-0,iothread=1,size=32G scsihw: virtio-scsi-single smbios1: uuid=09a61e30-ffce-4c98-b61c-0fb423592d26 sockets: 1 vmgenid: a3dd75b9-8de6-4598-8779-c8719af2d1d8

 

[csz.net]

Try using VirtIO SCSI (Single) instead of SATA.Please share the VM configuration file (or qm config VM_NUMER) instead of screenshots.

Do you mean to change the hard disk from SATA1 to SCSI1?

 

[leesteken]

Have you tried using VirtIO SCSI (Single) instead of SATA?

sata1: /dev/disk/by-id/ata-ST4000VX015-3CU104_WW610899,size=3907018584K

Try changing sata1 in that line to scsi1. You might want to enable IO Thread in the GUI afterwards.

Do you mean to change the hard disk from SATA1 to SCSI1?

Yes and enable IO Thread, like you did for scsi0.

 

[csz.net]

Have you tried using VirtIO SCSI (Single) instead of SATA?

Try changing sata1 in that line to scsi1. You might want to enable IO Thread in the GUI afterwards.

Yes and enable IO Thread, like you did for scsi0.

Thank you for your help, my problem has been solved.