DSM6.2.3 3615xs on a proxmox vm, sata link speed only at 1.5 gbps


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Hey;

 

I used a xpenology backup template to install a x3615xs, no issue.

 

DSM = 6.2.3.25426

Loader - Jun 1.04b I think

 

My question is why my sata link speed only showing 1.5 gbps? I was expecting 6 gbps like in a baremetal setup I did before. I am not even sure this is a Proxmox setting issue or is Xpenology thing? anybody has similar question and found a solution before?

 

Please see below dmesg result, and I also attached a screen shot of my proxmox vm

 

thanks in advance.

 

I used "dmesg | grep-i SATA", here is the results:

 

 

[    1.667473] ahci 0000:00:1f.2: AHCI 0001.0000 32 slots 6 ports 1.5 Gbps 0x3f impl SATA mode
[    1.687124] ata1: SATA max UDMA/133 abar m4096@0xfea1b000 port 0xfea1b100 irq 44
[    1.687132] ata2: SATA max UDMA/133 abar m4096@0xfea1b000 port 0xfea1b180 irq 44
[    1.687138] ata3: SATA max UDMA/133 abar m4096@0xfea1b000 port 0xfea1b200 irq 44
[    1.687144] ata4: SATA max UDMA/133 abar m4096@0xfea1b000 port 0xfea1b280 irq 44
[    1.687151] ata5: SATA max UDMA/133 abar m4096@0xfea1b000 port 0xfea1b300 irq 44
[    1.687157] ata6: SATA max UDMA/133 abar m4096@0xfea1b000 port 0xfea1b380 irq 44
[    1.688203] ahci 0000:06:07.0: AHCI 0001.0000 32 slots 6 ports 1.5 Gbps 0x3f impl SATA mode
[    1.706898] ata7: SATA max UDMA/133 abar m4096@0xfde80000 port 0xfde80100 irq 45
[    1.706906] ata8: SATA max UDMA/133 abar m4096@0xfde80000 port 0xfde80180 irq 45
[    1.706912] ata9: SATA max UDMA/133 abar m4096@0xfde80000 port 0xfde80200 irq 45
[    1.706919] ata10: SATA max UDMA/133 abar m4096@0xfde80000 port 0xfde80280 irq 45
[    1.706925] ata11: SATA max UDMA/133 abar m4096@0xfde80000 port 0xfde80300 irq 45
[    1.706931] ata12: SATA max UDMA/133 abar m4096@0xfde80000 port 0xfde80380 irq 45
[    1.993211] ata1: SATA link down (SStatus 0 SControl 300)
[    1.994214] ata3: SATA link down (SStatus 0 SControl 300)
[    1.994379] ata4: SATA link down (SStatus 0 SControl 300)
[    1.994533] ata2: SATA link down (SStatus 0 SControl 300)
[    1.994670] ata6: SATA link down (SStatus 0 SControl 300)
[    1.994822] ata5: SATA link down (SStatus 0 SControl 300)
[    2.012237] ata7: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    2.012424] ata8: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    2.013157] ata12: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    2.013322] ata10: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    2.014174] ata9: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    2.014334] ata11: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    2.358960] aic94xx: Adaptec aic94xx SAS/SATA driver version 1.0.3 loaded
[    2.369232] LSI 3ware SAS/SATA-RAID Controller device driver for Linux v3.26.02.000.

IMG-5631.jpg

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Cannot speak to Proxmox, but if I inspect my DSM 6.2.3 running on ESXi, I get no SATA connection speed status on virtual disks, but valid 6.0 Gbps for physical.

 

Virtual disk is being presented as a SATA device for compatibility purposes, yet the device in question operates at full speed (>1GBps in the case of this NVMe backed store).  Why don't you test your virtual disk and see if you get >150MBps and if you do, clearly are not limited by whatever you find in dmesg.

 

root@nas:~# smartctl -d sat -i /dev/sda
smartctl 6.5 (build date Mar 12 2020) [x86_64-linux-3.10.105] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     VMware Virtual SATA Hard Drive
Serial Number:    10000000000000000001
LU WWN Device Id: 5 000c29 bafa731d8
Firmware Version: 00000001
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ATA/ATAPI-6 T13/1410D revision 0
Local Time is:    Mon Feb 14 12:28:40 2022 PST
SMART support is: Unavailable - device lacks SMART capability.

root@nas:~# smartctl -d sat -i /dev/sdh
smartctl 6.5 (build date Mar 12 2020) [x86_64-linux-3.10.105] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Samsung based SSDs
Device Model:     SAMSUNG MZ7LM3T8HCJM-00003
Serial Number:    [redacted]
LU WWN Device Id: 5 002538 c0009dd5d
Firmware Version: GXT3003Q
User Capacity:    3,840,755,982,336 bytes [3.84 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 4c
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon Feb 14 12:30:43 2022 PST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

root@nas:~#

 

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thanks for your reply.

 

I tested before, it started with 700MB/s, but quickly dropped and stay at 200MB/s, I thought it should be around 500MB/s because it should 6bps speed. Am I correct? or I expected too much? 

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Someone with Proxmox experience needs to answer that.  But if it is actually being bottlenecked by SATA 1.5 you should see a max of about 120MBps.

 

Again this is all virtualized right?  So the SATA specs may not mean anything as it is emulated in the first place.  What's the actual performance of your underlying storage?

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