I have two SSD (nvme, pcie 4.0) and one SATA disk. One of the SSD seems to be very slow in reading operations - one is getting 2 GB/s and the other one 200 MB/s.
I'm not sure what can be the cause or how can I get more info. Any ideas?
Benchmark:
root:/# hdparm -Tt /dev/nvme0n1; echo 'second'; hdparm -Tt /dev/nvme1n1
/dev/nvme0n1:
Timing cached reads: 29588 MB in 2.00 seconds = 14813.35 MB/sec
HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device
Timing buffered disk reads: 596 MB in 3.01 seconds = 198.00 MB/sec
second
/dev/nvme1n1:
Timing cached reads: 29354 MB in 2.00 seconds = 14697.06 MB/sec
HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device
Timing buffered disk reads: 6376 MB in 3.00 seconds = 2124.77 MB/sec
I havent found any issue running smartctl -a /dev/nvme0 or nvme error-log /dev/nvme0
System details:
root:/# uname -a
Linux ryzen-desktop 5.11.0-25-generic #27~20.04.1-Ubuntu SMP Tue Jul 13 17:41:23 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
root:/# cat /etc/issue
Ubuntu 20.04.3 LTS \n \l
Slow SSD is 74% full:
Filesystem Size Used Avail Use% Mounted on
/dev/nvme0n1p1 916G 638G 232G 74% /other
HW specification:
Motherboard: X570 AORUS MASTER (https://www.gigabyte.com/Motherboard/X570-AORUS-MASTER-rev-10/sp#sp, manual (pdf) - https://download.gigabyte.com/FileList/Manual/mb_manual_x570-aorus-master_1002_e.pdf?v=30c7ecc8f9bc0e464b65a4062dd58841)
First SSD (fast): Force Series Gen.4 PCIe MP600 1TB NVMe M.2 SSD (https://www.corsair.com/us/en/Categories/Products/Storage/M-2-SSDs/Force-Series%E2%84%A2-Gen-4-PCIe-NVMe-M-2-SSD/p/CSSD-F1000GBMP600)
Second SSD (slow): WD BLACK SN850 NVMe SSD (https://www.westerndigital.com/products/internal-drives/wd-black-sn850-nvme-ssd#WDS100T1X0E)
I have also old SATA HDD connected.
Corsair (the fast one) is connected to M2C and WD (slow one) to M2A slots (see the motherboard's manual). The SATA disk is connected to SATA port 1.
