6.4TB INTEL P4608 SSD DC $250

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D

Damo

Active Member
Sep 7, 2022
131
37
28
Feels said:
Could some one please post output of "sudo lspci | grep -i nvme" I just want to compare mine. I got some problem with Intel P4608 disks, connected three in raid0 but having slow speeds.
Mine showing x4 speed for three disks
  • /dev/nvme1n1: 60:00.0, LnkSta: Speed 8GT/s, Width x4
  • /dev/nvme2n1: 61:00.0, LnkSta: Speed 8GT/s, Width x4
  • /dev/nvme3n1: 88:00.0, LnkSta: Speed 8GT/s, Width x4
  • /dev/nvme4n1: 89:00.0, LnkSta: Speed 8GT/s, Width x4
  • /dev/nvme5n1: da:00.0, LnkSta: Speed 8GT/s, Width x4
  • /dev/nvme6n1: db:00.0, LnkSta: Speed 8GT/s, Width x4
Click to expand...
Code: 
sudo lspci | grep -i nvme
43:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller]
44:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller]
 
D

Damo

Active Member
Sep 7, 2022
131
37
28
Feels said:
@Damo
Sorry, i meant
sudo lspci -vv | grep -E 'NVMe|LnkSta'
Click to expand...
From one machine
Code: 
c3:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] (prog-if 02 [NVM Express])
        Subsystem: Oracle/SUN NVMe PCIe 3.0 SSD 6.4TB AIC (P4608)
                LnkSta: Speed 8GT/s, Width x4
                LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
c4:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] (prog-if 02 [NVM Express])
        Subsystem: Oracle/SUN NVMe PCIe 3.0 SSD 6.4TB AIC (P4608)
                LnkSta: Speed 8GT/s, Width x4
                LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
                LnkSta: Speed 5GT/s, Width x1 (downgraded)
                LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete- EqualizationPhase1-
                LnkSta: Speed 5GT/s, Width x1 (downgraded)
                LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- EqualizationPhase1-
                LnkSta: Speed 2.5GT/s (downgraded), Width x1
                LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete- EqualizationPhase1-
                LnkSta: Speed 16GT/s, Width x16
                LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+ EqualizationPhase1+
                LnkSta: Speed 16GT/s, Width x16
                LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete- EqualizationPhase1-
                LnkSta: Speed 16GT/s, Width x16
                LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+ EqualizationPhase1+
                LnkSta: Speed 16GT/s, Width x16
                LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete- EqualizationPhase1-

root@XXXXXXXXXXXX:~# sudo lspci | grep -i nvme
81:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
82:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
c3:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller]
c4:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller
 
F

Feels

New Member
Aug 14, 2024
22
3
3
@Damo, thanks! Well, seems your disk also using x4 lanes, i set x16 for pci slots, however disks controllers requesting x4. It might be a problem with my raid0 setup then.

Code: 
8:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] (prog-if 02 [NVM Express])
    Subsystem: Oracle/SUN NVMe PCIe 3.0 SSD 6.4TB AIC (P4608)
        LnkSta:    Speed 8GT/s, Width x4
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
89:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] (prog-if 02 [NVM Express])
    Subsystem: Oracle/SUN NVMe PCIe 3.0 SSD 6.4TB AIC (P4608)
        LnkSta:    Speed 8GT/s, Width x4
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
        LnkSta:    Speed 8GT/s, Width x8
        LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+ EqualizationPhase1+
        LnkSta:    Speed 8GT/s, Width x8
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
        LnkSta:    Speed 8GT/s, Width x4
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
        LnkSta:    Speed 8GT/s, Width x4
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
b1:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] (prog-if 02 [NVM Express])
    Subsystem: Oracle/SUN NVMe PCIe 3.0 SSD 6.4TB AIC (P4608)
        LnkSta:    Speed 8GT/s, Width x4
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
b2:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] (prog-if 02 [NVM Express])
    Subsystem: Oracle/SUN NVMe PCIe 3.0 SSD 6.4TB AIC (P4608)
        LnkSta:    Speed 8GT/s, Width x4
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
        LnkSta:    Speed 8GT/s, Width x8
        LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+ EqualizationPhase1+
        LnkSta:    Speed 8GT/s, Width x8
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
        LnkSta:    Speed 8GT/s, Width x4
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
        LnkSta:    Speed 8GT/s, Width x4
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
da:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] (prog-if 02 [NVM Express])
    Subsystem: Oracle/SUN NVMe PCIe 3.0 SSD 6.4TB AIC (P4608)
        LnkSta:    Speed 8GT/s, Width x4
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
db:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] (prog-if 02 [NVM Express])
    Subsystem: Oracle/SUN NVMe PCIe 3.0 SSD 6.4TB AIC (P4608)
        LnkSta:    Speed 8GT/s, Width x4
        LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
 
P

Puppetfreek

New Member
Nov 17, 2014
24
10
3
Doesn't each card have 2 controllers? i.e. each getting x4 link is what I would assume being the case.
 
F

Feels

New Member
Aug 14, 2024
22
3
3
@Puppetfreek, yeap you right, there are 2 controllers on each disk. That's why no difference between mine and Damo's figures. I'll try to tweak chunk sizes and recreate raid0 as disk based, not a partition based as they currently made.
 
F

Feels

New Member
Aug 14, 2024
22
3
3
@Damo, could you please test the write speed of your disk with "
sudo dd if=/dev/zero of=/YOUR/MOUNTPOINT/testfile bs=1M count=10240 conv=fdatasync

"
Mine 3 disks in raid0 producing 1.2 Gb/s and if i test 1 disk in raid0 it showing 920 mb/s.

Code: 
$ sudo dd if=/dev/zero of=/mnt/INTEL/testfile bs=1M count=10240 conv=fdatasync
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 9.32628 s, 1.2 GB/s
 
Last edited:
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