Re: Read/write slow on nvme drive - Supermicro X10DRL-CT

[mlelstv%serpens.de@localhost (Michael van Elst)]

derrick.lobo%givex.com@localhost (Derrick Lobo) writes:

>ppb2: link is x4 @ 8.0GT/s 
>pci3 at ppb2 bus 4
>pci3: i/o space, memory space enabled, rd/line, wr/inv ok
>nvme0 at pci3 dev 0 function 0: vendor 8086 product 0953 (rev. 0x01)
>nvme0: NVMe 1.0
>nvme0: for admin queue interrupting at msix2 vec 0
>nvme0: INTEL SSDPEDMX020T4, firmware 8DV10135, serial CVPD5141008N2P0SGN
>nvme0: for io queue 1 interrupting at msix2 vec 1
>ld0 at nvme0 nsid 1
>ld0: 1863 GB, 243201 cyl, 255 head, 63 sec, 512 bytes/sect x 3907029168
>sectors
>ld0: GPT GUID: 63709747-6ba1-4c78-93ff-74a1437f5c67
>dk0 at ld0: "5d0d649e-9280-4a8c-9fe5-e28de7f0783b", 3907029101 blocks at
>34, type: ffs

Nominally about 2700MB/s reading and 1800MB/s writing. It's a bit
older, maybe it only reaches that speed using multiple I/O queues
but our driver only uses a single I/O queue.


>atabus4 at ahcisata0 channel 4
>wd1 at atabus4 drive 0
>wd1: <Samsung SSD 850 EVO 2TB> 
>wd1: drive supports 1-sector PIO transfers, LBA48 addressing
>wd1: 1863 GB, 3876021 cyl, 16 head, 63 sec, 512 bytes/sect x 3907029168
>sectors
>wd1: GPT GUID: 6a0b69cd-d01a-418e-8425-79570c1b52e6
>dk1 at wd1: "66562866-5ffa-43b0-88a1-d8a7c16e95ce", 3907029101 blocks at
>34, type: ffs
>wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
>wd1(ahcisata0:4:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6
>(Ultra/133) (using DMA) 

That drive should sustain 500MB/s reading and 450MB/s writing.
It's a bit confusing that it is exactly the same capacity as the NVME card.


>dk0 at ld0 (5d0d649e-9280-4a8c-9fe5-e28de7f0783b) deleted
>ld0: GPT GUID: 39b3bde1-cbef-4410-bbb8-37f0ffdda723
>ld0: GPT GUID: 39b3bde1-cbef-4410-bbb8-37f0ffdda723
>dk0 at ld0: "2636dcf1-da9e-41b5-9803-78114f38b223", 3907029101 blocks at
>34, type: ffs 

Probably just a rewrite of the GPT label.



-- 
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                                Michael van Elst
Internet: mlelstv%serpens.de@localhost
                                "A potential Snark may lurk in every tree."