Determine USB-ATA bridge chip typeįrom version 2.40, Hard Disk Sentinel displays vendor and product code (VID and PID) of the USB-ATA bridge chip on the 'Information' page when the external hard disk is selected. Of course when a manufacturer can provide information, details and/or an engineering sample unit, we can examine and add full support with high priority. For unknown/new USB-ATA bridge chips we try to get information from manufacturers with more or less success. We always look for other USB-ATA bridge chips and their features. These chips are listed as 'Not possible' to support in the table below - because of the required function is missing from the chips. If the USB-ATA bridge chip physically has no support for it, Hard Disk Sentinel will not be able to detect any information about hard disks with such USB-ATA bridge chip. Using hard disks with these USB-ATA bridge chips are not too safe because it is not possible to access any S.M.A.R.T. In contrast, many USB-ATA bridge chips do not support such features. These USB-ATA bridge chips also allow to use special commands for example to set acoustic level and to test the hard disk using hardware self tests and control the hard disk just like if it were an internal disk.

They have different features: some of them can allow software like Hard Disk Sentinel to detect hard disk temperature, health and full S.M.A.R.T. Many companies make such USB-ATA bridge chips. 1 square centimeter) chip inside the external enclosure, next to the hard disk connector.

This device is called 'USB-ATA bridge chip' - the bridge between the host (computer) and the hard disk. The hard disk can execute such commands (for example, reading, writing and so) and then sends data and results back to the host, through this device again. To communicate between the hard disk and the host (the computer) a special device is required to 'translate' USB commands to standard ATA commands. There is an IDE or S-ATA hard disk inside the external USB enclosures. It is hard to decide which is better and which is best to avoid. Many different USB (or firewire) external hard disks are available. Compatible USB hard disks, USB hard disk enclosures

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