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81835
what is the speed rate of Dell SSD ?
Hi Team,
I got a chart of Dell for SSD speed rate as below:
from here you can see the rate is calculated by K, so how can i convert it to Mb/s ?
Thanks
This post is more than 5 years old
13 Posts
0
81835
Hi Team,
I got a chart of Dell for SSD speed rate as below:
from here you can see the rate is calculated by K, so how can i convert it to Mb/s ?
Thanks
Top
speedstep
9 Legend
9 Legend
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47K Posts
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March 26th, 2018 09:00
Class 10 vs 20 vs 30 vs 40 vs 50 2100K = 2.1 Meg
Posting Pictures Doesnt work All we see is a Triangle
The answer is not a one size fits all nor is it a sound byte.
Class
Sequential RW
Random RW
Interface
10 Value
520K/320K
30K/10K
Sata
20 Mainstream
500K/300K
80K/60K
Sata
30 Performance
550K/350K
90K/75K
Sata
40 Performance
1500K/350K
200K/80K
PCI-E NVME
50 Performance
2100K/1200K
300K/100K
PCI-E CARD X4
Sequential = Boot, hibernate, daily power up and down
Random = tasks such as file search:KIOPS
Typical SATA 2 speed is 250K
Typical SATA 3 speed is 500K
The faster speeds are usually 2 NVME drives in parallel RAID 0
X16 PCI-E cards can Get 8000K sequential speed.
https://www.seagate.com/files/www-content/datasheets/pdfs/nytro-5910-nvme-ssdDS1953-3-1801US-en_US.pdf
Sequential Read (MB/s) Sustained, 128KB 8,150,000
Sequential Write (MB/s) Sustained, 128KB 4,800,000
Random Read (IOPS) Sustained, 4KB QD64 975,000
Random Write (IOPS) Sustained, 4KB QD64 132,000
Random 70/30 R/W (IOPS) Sustained, 4KB QD64 369,000
Tesla1856
8 Wizard
8 Wizard
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17K Posts
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March 26th, 2018 12:00
Can't see your pic, but typically you divide by 8 (8 bits in a byte).
LinhDell
13 Posts
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March 26th, 2018 18:00
So it means for example:
20 Mainstream
500K/300K
-> The sequential rate is ~ 0.5Mb/s / 0.3 Mbps ?
Thanks
speedstep
9 Legend
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47K Posts
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March 30th, 2018 08:00
Yes thats the typical SATA 3 speed for onboard controller. Faster requires Raid where more than one drive at a time is running and typically X2 X4 X8 X16 PCI-E.
Apricorn Velocity Solo X1 card is 500K max for example.
The Serial ATA (SATA) interface was designed primarily for interfacing with hard disk drives (HDDs), doubling its native speed with each major revision: maximum SATA transfer speeds went from 1.5 Gbit/s in SATA 1.0 (standardized in 2003), through 3 Gbit/s in SATA 2.0 (standardized in 2004), to 6 Gbit/s as provided by SATA 3.0 (standardized in 2009)
https://www.bhphotovideo.com/c/product/887344-REG/Apricorn_vel_solo_x1_Velocity_Solo_x1_SSD.html
PCIe 2.0 x1 slot with two SATA III (6 Gbps)
(backwards compatible with PCIe 1.0 x1 slot and SATA II & I)
DaveyBR
2 Posts
1
June 1st, 2020 06:00
If anyone is interested I benchmarked my Dell Class 35 (mainstream) 128GB NVMe drive in a 3070 micro and got the following:-
It's definitely faster than a SATA SSD but also noticeably slower (higher latency and lower throughput) than top end NVMe drives I've used.
Full model number = KBG40ZNS128G NVMe KIOXIA 128GB and it uses Toshiba NAND chips.
ScottyHTS
3 Posts
0
March 28th, 2021 09:00
Class-35 appears to be DRAM-less SSDs, likely using QLC chips. Tehy are PCIe, gen 3, and likely top our around the ~2200MB/s in the 512GB/1TB versions.