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Author Topic: NEW Raspberry Pi 3 Model A+ announced  (Read 1501 times)
N3TJO
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« on: November 15, 2018, 04:37:29 AM »

1.4GHz 64-bit quad-core processor, dual-band wireless LAN, Bluetooth 4.2/BLE in the same mechanical format as the Raspberry Pi 1 Model A+

https://www.raspberrypi.org/products/raspberry-pi-3-model-a-plus/
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KX4OM
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Posts: 343




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« Reply #1 on: November 20, 2018, 02:20:38 PM »

At $25, that is only $5 less than the price of my 3 B+ that I got at Microcenter. I know that they are focused on providing low cost features, but I really, really would like to see SATA or USB 3.1 for external hard drives. Yes, other SOC boards do that but they do not have the benefit of a large community for support.

Ted, KX4OM
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N6MST
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« Reply #2 on: November 21, 2018, 02:28:18 PM »

USB 3.1 for external hard drives.

I don't have experience with this but the internet says USB 3 is more than ten times faster than USB 2. Is the speed difference similar to SSD vs HDD, like you will TOTALLY notice in most operations or is it just something that is really good for certain tasks?
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N3TJO
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« Reply #3 on: November 27, 2018, 06:08:58 AM »

Have you looked at the Geekworm Raspberry Pi  SATA HDD/SSD Storage Expansion Board?

At $25, that is only $5 less than the price of my 3 B+ that I got at Microcenter. I know that they are focused on providing low cost features, but I really, really would like to see SATA or USB 3.1 for external hard drives. Yes, other SOC boards do that but they do not have the benefit of a large community for support.

Ted, KX4OM
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KX4OM
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« Reply #4 on: November 27, 2018, 08:29:12 AM »

The Geekworm specs are confusing. They say the board allows use of SATA hard drives, 2.5" only. I have used 2.5" with a USB to SATA adapter, and 3.5" with a powered USB to SATA adapter, and I currently have an IDE/PATA 3.5" hard drive connected with a powered USB to IDE connector. Each of these drives are limited by USB 2.0 transfer speeds, as that is what all of the Raspberry Pi models use. I have a Model B+, a Model 3 B+, and a Pi Zero Version 3.1.

In the specifications for the Geekworm product, there is only a mention of Apple Mac OSX and PC s with USB 3 data transfer to SATA 2.5" drives at USB 3 speeds. From the limited information, I can't see anything about the Pi's interface that allows the add-on board to run at USB 3 speeds. USB 2.0 max speed is 60 MBs, and USB 3.0 is 625 MBs.

I use a Themaltake Black hard drive dock to do OS imaging with Marcum Reflect on my Windows PCs. The model I have has USB 2.0 and eSATA capability for the computers that have eSATA externa interfaces; 3 of the PCs have them. USB 3.0 and eSATA transfer speeds are roughly the same. I don't have any USB 3.0 or 3.1 PCs. One of my USB to SATA adapters is USB 3.0, but it runs only 2.0 speed with the USB 2.0 interface computers I have, including the Pi units.

PCs that have only USB 2.0 provided on the motherboard can use add-on use USB 3.0 PCI cards to get 3.0 capability, but the Pi does not have expansion capability like that, unless I am totally misunderstanding something. Maybe they use the Ethernet capability, which is high speed on the Pi 3 B+.

Ted, KX4OM
« Last Edit: November 27, 2018, 08:39:30 AM by KX4OM » Logged
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