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Anyone try a Class 10 Micro SD for OGM1 navi?

wottenad

By wottenad
in Audio, Electronics & Software

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wottenad Enthusiast

wottenad

Posted
Posted

Wondering if anyone has tried to copy their map info from the Class 4 Micro SD card that comes stock with the OGM1 to a Class 10 card to see if it has any effect on the iGo Primo map bootup time?

 

As you know, there is a short process that the iGo Primo system goes through to unzip necessary files. What I don't know is whether this process is affected by the speed that data can be read from the card, or if it's limited by the speed of the processor.

 

If possible, do a comparison test measuring the time difference (if any) from pushing the navi button to landing on the map screen on the navi using both cards. Brand/model and speed info would be helpful.

 

Ideally, if we can get multiple volunteers to try different cards and narrow down the best performers (if there's any difference, that is), that would be great data to have.

 

My guess is that a Class 10 card may speed up this process, but to what extent? If so, it may be the best speed mod you can do on this deck for under $20...

 

Anybody own a Class 10 card or two to try this experiment?

holty Enthusiast

holty

Posted
Posted

I'm absolutely willing to give it a try. I dont own a class 10 card, but i'm willing to pick one up. Can you recommend one?

kibosh Enthusiast

kibosh

Posted
Posted

This was the first thing I did when I got my OGM1 from you. However I never did a comparison . . . it only stands to reason that it is faster.

 

I will try and do a comparison and post my results.

kibosh Enthusiast

kibosh

Posted
Posted

OK, I ran several (non-scientific) tests with the Toshiba Class 4 4GB card that came with the unit and the Transcend Class 10 8GB card that I purchased (cost me $8) and surprisingly found the following:

 

Class 4

29.2 secs

27.4

26.9

25.8

25.7

 

Class 10

30.6

27.7

27.2

27.2

27.2

 

It would appear that the read speed of the card reader in the unit is maxed out by a class 4 card and in fact the class 4 could be slightly faster. This may be due to the higher capacity of the 8GB card.

 

Interesting and a little disappointing.

wottenad Enthusiast

wottenad

Posted
  • Author
Posted

OK, I ran several (non-scientific) tests with the Toshiba Class 4 4GB card that came with the unit and the Transcend Class 10 8GB card that I purchased (cost me $8) and surprisingly found the following:

 

Class 4

29.2 secs

27.4

26.9

25.8

25.7

 

Class 10

30.6

27.7

27.2

27.2

27.2

 

It would appear that the read speed of the card reader in the unit is maxed out by a class 4 card and in fact the class 4 could be slightly faster. This may be due to the higher capacity of the 8GB card.

 

Interesting and a little disappointing.

 

 

This sure makes it look like the speed is limited by the processor, doesn't it?

 

However, after reading up on a few Class 10 cards, it looks like some are definitely more adept at large file access (large video files, photos, etc.) at the expense of fast access with multiple small files (which this qualifies due to the data.zip and branding.zip being 31MB and 494K respectively). I'm no expert at which cards function better in which scenario, just that some are better than others for each task.

 

Don't know your Transcend card stacks up in this regard...

aesalazar Enthusiast

aesalazar

Posted
Posted

Does iGo extract the zip to the card? I thought it is directly to memory to avoid taking up too much storage space but I could be wrong on that.

 

Zip compression is extremely processor intensive so unfortunately we probably would not benefit from a faster sd card :( but would love to be proven wrong.

 

Ernie

Rosedog Enthusiast

Rosedog

Posted
Posted

I've tried PNY and Kingston before using "SD Tools" (play.google.com) and they never managed to live up to their class rating. I've stuck with San Disk, they always meet or exceed their ratings. You can get a San Disk Micro SDHC Class 10 64gb for $40. Its what I use in my Galaxy Note.

kibosh Enthusiast

kibosh

Posted
Posted

Both cards I tested exceed their class rating (which is easy to do given the Class 10 minimum speed is 10MB/s). Writing is the slow process for the class 4 card vs the class 10 card I tested.

 

Unfortunately many readers max out at around 20MB/s for reading which is what I suspect is happening here since both cards can achieve that speed when tested on my PC.

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