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Recovery of ASMedia ASM1051

An ASMedia ASM1051 chip on a small circuit board, attached to a SATA hard drive.

Quite some time ago, I bought a super-cheap 2.5” USB 3.0 enclosure on eBay. It was no more than a few pounds, so when it suddenly stopped working one day, I didn’t cry about it. But it was a tad annoying, because I’d keep reaching for it in the drawer, knowing it had a sizeable drive in there.

One day I picked it up and, imagining its time in the drawer might have healed it, plugged it into a laptop. Magically, it worked! But when it came to transferring the files to another machine – dead again. It sat there with its light on, drive spinning, but never appearing as a USB device.

Then I twigged. The laptop had USB 3.0. My desktop machine did not. How bizarre! I tested my theory between a few more machines until the proof was in; connecting the drive to any USB 2.0 machine would not work, while USB 3.0 was just dandy.

It went back in the drawer.

The Fix

Today I reached for it again and this time decided to see if a repair was possible. Firmware would seem to be the culprit, but nobody is sensible enough to produce a firmware flash utility for such things, surely?

Taking a closer look shows an ASMedia ASM1051 bridge chip. Luckily, the nice folks at Plugable based their USB3-SATA-U3 around the same chip and they do indeed provide an ASM1051 firmware update utility known as MP Tool! Sensible people! The best news is that it targets the chip and doesn’t do any weird manufacturer-specific fiddling to prevent you from running it on other devices. I had very little to lose, so I simply followed their instructions; plug in, run software, press ‘Start’.

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