Direct Download Of Software For version 1.4 of H2testw – Gold Standard In Detecting USB Counterfeit Drives
Archive for the ‘USB’ Category
Replace ‘#’ with the disk number of your USB flash drive as appeared in “list disk” below
select disk #
create partition primary
select partition 1
format quick fs=fat32
Note: “format fs=fat32” (if you choose to use ntfs, you’ll later have to run the “Bootsect.exe /nt60 K:” command to put boot manager compatible files onto your USB flash drive to make it a bootable device).
Please find the link to download the HP USB Key Creator Utility Version 220.127.116.11
If you have a USB device connected to a computer running Windows Vista, Windows Server 2008, Windows 7, or Windows Server 2008 R2, and you then Disable the device in Device Manager, or Safely Remove the device using the system tray icon, you may observe one of the following symptoms:
•The USB device shows continued indications of activity (such as an LED that remains illuminated).
•The USB device continues to receive USB packets and continues to consume power corresponding to an active device state.
•Physically disconnecting the Disabled or Safely Removed USB device may, in some cases, cause an error in an active transfer to a different USB device.
These symptoms are not observed on a computer running Windows XP or Windows Server 2003 under similar conditions.
Consider the following scenario:
a. You have a computer that is running Windows 7 or Windows Server 2008 R2.
b. The computer has an NVIDIA USB Enhanced Host Controller Interface (EHCI) chipset.
c. The computer has at least 4GB of RAM.
d. You try to copy data from the computer to an external USB storage device.
In this scenario, either of the following issues occurs:
1. The computer stops responding.
2. The copy operation stops.
There are different speed grades available, measured the same as CD-ROMs, in multiples of 150 kB/s (1x = 150 kB/s). Basic cards transfer data up to six times (6x) the data rate of the standard CD-ROM speed (900 kB/s vs. 150 kB/s). High-speed cards are made with higher data transfer rates like 66x (10 MB/s), and high-end cards have speeds of 200x or higher.
SanDisk classifies their cards as:
* Ultra II—minimum read speed of 15 MB/s (100x)
* Extreme III—maximum speed of 30 MB/s (200x)
* Extreme IV—up to 45 MB/s (300x)
Note that maximum read speed and maximum write speed may be different. Maximum write speed typically is lower than maximum read speed. Some digital cameras require high-speed cards (write speed) to record video smoothly or capture multiple still photographs in rapid succession. This requires a certain sustained speed, or the video stops recording. For recording, a high maximum speed with a low sustained speed is no better than a low speed card. The 2.0 specification defines speeds up to 200x.
Capacity Standard SD: 1 MB to 2 GB
SDXC (2009) – 64GB to 2TB
SDHC (2006) – 4GB -32 GB
SD (1999) – up to 2GB
SDXC cards are formatted in the exFAT file system, which allows for files of virtually unlimited size. (SDHC, which uses FAT32, can only record files up to 4 GB.)
|Rating||Speed (MB/s)||SD Class|
Corsair Flash Voyager GT 34Mbs
Memina Rocket 30Mbs
Lexar JumpDrive Lightning 30Mbs
OCZ Rally 2 28Mbs
Kingston Data Traveler Secure 24Mbs
SanDisk Cruzer Titanium 15Mbs
You may use this tool (USB Flash Drive Tester) to test the speed
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