SD and SSD - Is there really a huge technological difference?
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@Bill-Kindle said:
So I'm having an interesting conversation with someone, being told I'm wrong and such, that SSD offers superior write speeds over SD, even the HC 10 type.
I guess I'm a little ignorant then, because I thought flash memory was the same technologically, but had different use cases. If anyone has some info that they would like to point me to I'm going to do some reading and research on the topic, and possibly write something up.
here's an article that sort of sparked it:
http://kb.sandisk.com/app/answers/detail/a_id/3053/~/the-differences-between-an-ssd-and-a-memory-cardI guess a major difference would be the controller, that SSDs have chipsets on them and use SATA as opposed to SDHC/SDXC cards that use readers, internal or external. To me, being dependent on a reader, as SD cards are, is the bottleneck. SSDs use SATA connections, and mostly SATA III. That's one major difference I can think of.
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Internal technology is different an SSD is basically a raid 0 of SD/Flash Chips. Much faster write speeds. SD cards have relatively slow write speeds on their own, even with another interface on the chips.
Panasonic P2 Cards were some of the first high performance SSDs (for video production). I think I paid $3,000 or more for a 32GB (R Series) one. Crazy. That was in 2003 I think.
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@ajstringham said:
@Bill-Kindle said:
So I'm having an interesting conversation with someone, being told I'm wrong and such, that SSD offers superior write speeds over SD, even the HC 10 type.
I guess I'm a little ignorant then, because I thought flash memory was the same technologically, but had different use cases. If anyone has some info that they would like to point me to I'm going to do some reading and research on the topic, and possibly write something up.
here's an article that sort of sparked it:
http://kb.sandisk.com/app/answers/detail/a_id/3053/~/the-differences-between-an-ssd-and-a-memory-cardI guess a major difference would be the controller, that SSDs have chipsets on them and use SATA as opposed to SDHC/SDXC cards that use readers, internal or external. To me, being dependent on a reader, as SD cards are, is the bottleneck. SSDs use SATA connections, and mostly SATA III. That's one major difference I can think of.
Lets take this out a little further. You have an IP camera that has a built in SD card interface. Is it faster to write to a quality SD card locally on the IP camera or is it faster to send it over the network to a NVR that has an SSD? I would think local storage would win out. Am I thinking of this incorrectly?
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@Bill-Kindle said:
@ajstringham said:
@Bill-Kindle said:
So I'm having an interesting conversation with someone, being told I'm wrong and such, that SSD offers superior write speeds over SD, even the HC 10 type.
I guess I'm a little ignorant then, because I thought flash memory was the same technologically, but had different use cases. If anyone has some info that they would like to point me to I'm going to do some reading and research on the topic, and possibly write something up.
here's an article that sort of sparked it:
http://kb.sandisk.com/app/answers/detail/a_id/3053/~/the-differences-between-an-ssd-and-a-memory-cardI guess a major difference would be the controller, that SSDs have chipsets on them and use SATA as opposed to SDHC/SDXC cards that use readers, internal or external. To me, being dependent on a reader, as SD cards are, is the bottleneck. SSDs use SATA connections, and mostly SATA III. That's one major difference I can think of.
Lets take this out a little further. You have an IP camera that has a built in SD card interface. Is it faster to write to a quality SD card locally on the IP camera or is it faster to send it over the network to a NVR that has an SSD? I would think local storage would win out. Am I thinking of this incorrectly?
The bottleneck would become your network connection. Every hop it goes through, every foot of cable it runs over, etc. Every bit of that is room for slowdowns. It would depend.
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@Bill-Kindle said:
@ajstringham said:
@Bill-Kindle said:
So I'm having an interesting conversation with someone, being told I'm wrong and such, that SSD offers superior write speeds over SD, even the HC 10 type.
I guess I'm a little ignorant then, because I thought flash memory was the same technologically, but had different use cases. If anyone has some info that they would like to point me to I'm going to do some reading and research on the topic, and possibly write something up.
here's an article that sort of sparked it:
http://kb.sandisk.com/app/answers/detail/a_id/3053/~/the-differences-between-an-ssd-and-a-memory-cardI guess a major difference would be the controller, that SSDs have chipsets on them and use SATA as opposed to SDHC/SDXC cards that use readers, internal or external. To me, being dependent on a reader, as SD cards are, is the bottleneck. SSDs use SATA connections, and mostly SATA III. That's one major difference I can think of.
Lets take this out a little further. You have an IP camera that has a built in SD card interface. Is it faster to write to a quality SD card locally on the IP camera or is it faster to send it over the network to a NVR that has an SSD? I would think local storage would win out. Am I thinking of this incorrectly?
Seems like that is a comparison of network versus local not SD versus SSD.
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As far as I know, SD and SSD are the same technology but implemented differently. Basically the same though. SD uses the USB bus. SSD uses SATA, SAS or direct over PCIe.
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@Reid-Cooper said:
As far as I know, SD and SSD are the same technology but implemented differently. Basically the same though. SD uses the USB bus. SSD uses SATA, SAS or direct over PCIe.
That's just it. I wasn't denying that SD is slower than SSD, just saying that they use the same technology (flash memory) and that made the persons head explode. Name calling ensued, I was called an entitled to an education (whatever that means) and a troll. I simply asked what the differece was between a smart phone using an HC10 SD card recording video at 1080p and 25MB/s was any different than a IP camera writing to a local SD card and how SSD was any better. last I checked, you couldn't slide a SSD into a IP camera.
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@Bill-Kindle where did said conversation take place?
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@scottalanmiller said:
@Bill-Kindle where did said conversation take place?
On another forum. I'm dropping it for now but wanted to maybe write something up explaining why SD cards are just as capable in IP camera's as an SSD would be in an NVR.
I've done security camera work in a couple of past job roles. I'm familiar with IP cameras and their built in web servers that some have.
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SD and SSD really are the same thing. Just different cases, sizes or what have you. SD are perfectly reliable and usable for all kinds of general storage needs. There is a reason why so many systems today, from Raspberry Pi to Chomebooks use nothing except SD for their storage needs.
