MobyMemory Connectivity - Transfer Test Results

webmaster — Mon, 28 Jun 2004 01:12:01 GMT

The Official MobyMemory MMC - Connection Test Results:

1. Via USB2 Card Reader: (Fastest Transfer Mechanism available)

	Performance Tests: MobyMemory MMC Card (using USB2 7-in-1 MobyMemory Card Reader, Dell 400SC / Win2003 Server)
	Test File Size (Bytes)	WRITE Speed		READ Speed
	Test File Size (Bytes)	Duration (Secs.)	Bytes Transferred (per second)	Duration (Secs.)	Bytes Transferred (per second)
1Gb MMC	1,026,980,369	501	2,049,861	464	2,213,320
512mb MMC	511,199,012	250	2,044,796	236	2,166,098
256mb MMC	255,675,273	128	1,997,463	119	2,148,532
128mb MMC	128,159,862	65	1,971,690	60	2,135,998

Note:

These tests were conducted at the command-line using the copy command to transfer a single test file (.zip) to and from one connected drive (C: drive) to another ([Removable Drive]).

Read/write results will vary according to differing environmental test conditions; including USB port implementations on the PC (and USB port number used), other running operations on the PC(incl services etc), the card reader used, the USB cable, and the PC itself . For best results, the [Card Reader]-[Cable]-[PC USB port] connection should be USB2 (or USB Hi-Speed) end-to-end.

Also, the number of files transferred can have a significant impact on peformance (Many smaller files, of the same total size, will be slower to transfer than 1 large file).

2. Via PCMCIA Card Reader:

	Performance Tests: MobyMemory MMC Card (using PCMCIA 5-in-1 MobyMemory Card Reader, Samsung Q20, WinXP)
	Test File Size (Bytes)	WRITE Speed		READ Speed
	Test File Size (Bytes)	Duration (Secs.)	Bytes Transferred (per second)	Duration (Secs.)	Bytes Transferred (per second)
1Gb MMC	-*	-	-	-	-
512mb MMC	511,199,012	331	1,544,408	-	-
256mb MMC	255,675,273	167	1,530,990	-	-
128mb MMC	128,159,862	84	1,525,713	-	-

*5-in-1 PCMCIA Reader does not handle 1Gb MMC reliably.

Typically found to be 3/4^th to 2/3^rd speed of a USB2 connection.

3. Via USB Mobile Cable:

Speed varies for each mobile. Invariably slower than the first 2 connection options.

4. Via Bluetooth / 5. Infra-red (IrDA):

Again, speeds varies for each mobile and each bluetooth dongle. Invariably slower than the first 2 connection options.

IrDA is usually quicker than bluetooth implementations, but less flexible (needs clear line-of-sight, and to be within few feet of connecting device for good connection).

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MobyMemory Connectivity - Transfer Test Results