# 8-bay hard drive chassis disconnects during copy

**URL:** https://resource.dopus.com/t/8-bay-hard-drive-chassis-disconnects-during-copy/16014
**Category:** Help & Support
**Created:** [July 19, 2013, 3:36am UTC](https://resource.dopus.com/t/8-bay-hard-drive-chassis-disconnects-during-copy/16014 "2013-07-19T03:36:43Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![Leo](https://resource.dopus.com/user_avatar/resource.dopus.com/leo/32/69732_2.png) [@Leo](https://resource.dopus.com/u/Leo)
#### Post date: [July 19, 2013, 11:31pm UTC](https://resource.dopus.com/t/8-bay-hard-drive-chassis-disconnects-during-copy/16014/4 "2013-07-19T23:31:28Z")

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Is the enclosure's firmware up to date?

And your USB3.0 / SATA drivers (as applicable)?

The Mediasonic area for the drive has links to various drivers as well as discussion about problems/solutions with a few different firmware versions: [forum.mediasonic.ca/viewforum.php?f=27](http://forum.mediasonic.ca/viewforum.php?f=27)

The USB / SATA drivers are what I would try first.

Since the process is actually crashing, from the screenshot in your last reply, it's worth checking to see if a [crash dump](https://resource.dopus.com/t/crash-dumps-for-bug-reports/8861/1) has been created matching the date and time of the crash. If there is one with the right date & time, please zip it up and send it to us and we'll see if it reveals anything. (It may not, if something low-level like a driver or antivirus is crashing, but it's worth a look.)

If you haven't already, please try changing the Preferences / Miscellaneous / Advanced: copy\_buffer\_size setting to e.g. 1024 KB and the copy\_nonbufferio\_threshold to 0 (i.e. zero) to see if it helps avoid the problem. (If it doesn't, please reset them both back to their original values. There's a Reset button at the button of the Preferences page which resets the currently selected item.)

Another thing to try, since it's a crash and not just the drive disconnecting itself, is copying exactly the same files on to a local drive, in case it is something to do with the files and not the drives. (That could be cause by antivirus, for example.)

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_[View the full topic](https://resource.dopus.com/t/8-bay-hard-drive-chassis-disconnects-during-copy/16014)._