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who created SD cards?
- Thread starter Joe
- Start date
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SD is gaining steam and will probably be the defacto standard.
It helps that their competition are fucked up.
CF is way to big for consumer stuff (pro excluded
MMC is too big/old tech
XD is just stupid
Memory stick is too Sony
I guess SD do some good licensing deals too, which would help adoption rates.
It helps that their competition are fucked up.
CF is way to big for consumer stuff (pro excluded
MMC is too big/old tech
XD is just stupid
Memory stick is too Sony
I guess SD do some good licensing deals too, which would help adoption rates.
Shogmaster
Member
mrklaw said:
MMC is just SD without the "secure" part, and looks exactly the same. Maybe you meant Smart Media?
Crazymoogle
Member
Phoenix said:Until I can get a 4GB Microdrive in SD form, I'm all over CF
ATP just announced a 4GB SD card for the end of the year. Can't imagine it will be very cheap, but there you go...
Phoenix
Member
XMonkey said:
Nah, not even close. I've got a Microdrive sitting in a Canon Powershot S1 IS and it is the best thing I've ever used. SD cards aren't anywhere near the performance of a Microdrive for sustained capture/streaming of content.
I've encoded literally hours of content and dumped a microdrive on a single battery charge in that camera.
Phoenix said:
Aren't there new Ultra SD cards that has faster performance compared to the older cards?
I checked and the speed was read/write speed of 9-12MB/sec which is pretty comparable to Microdrive's performance AFAIK. Also, since the microdrive uses a disk based system, you aren't going to get consistent performance when reading/writing from the inside of the disk toward outside.
The obvious disadvantages of using a microdrive are seektime and how long it will last. Since it uses moveable parts, it's likely to get damaged easiler and wear out. The best thing that microdrive has going for it is price per megabyte.
Phoenix
Member
tenchir said:
Microdrives do 10-33MB/sec. You'd need an Extreme SD card (20MB/sec) just to get close.
The reason they are used is speed as well as price. You'd have to throw one AT the ground to actually damage it. It they were that easy to damage or wear out, they wouldn't be used in portable electronics such as iPods
Phoenix said:
You sure it's not 10-33 Mbit/sec? which is 1.2-4.2 MB/sec. The fastest one I can find so far for Microdrive is 4.9-9.4 MB/sec. The 9-12MB/sec that I quoted above are the 66x-80x SD cards. The extreme SD card are 133x which is 20-23MB/sec for sustained transfer rate.
The reason they are used is speed as well as price. You'd have to throw one AT the ground to actually damage it. It they were that easy to damage or wear out, they wouldn't be used in portable electronics such as iPods
They will still eventually wear out. It has moving parts and uses magnetic platter. It should have a lifespan similar to HDD. Most flash media have lifetime warranty on them.
edit:
I checked and found this for a microdrive.
http://www.memorysuppliers.com/hi4gbmi4cofl.html
Media transfer rate 57.1 - 97.9 Mbit/sec (max)
Interface transfer rate 33 MB/sec (max)
Sustained data rate 4.3 - 7.2 MB/sec
Big difference between interface transfer rate and Sustained data rate huh?
edit 2: Fastest microdrive I found so far:
http://www.photoalley.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10201&catalogId=10001&langId=-1&productId=13254256
Media transfer rate (Mbits/sec) 67 125
Interface transfer rate (MB/sec, max) 33 Ultra DMA mode-2 (True-IDE mode)
Sustained data rate (MB/sec) 4.9 - 9.4
I think you got interface speed with sustained speed mixed up.
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