1

I've recently moved my VMWare virtual machine (disk image) to an external USB SSD drive (Samsung T3). The guest operating system has became very slow to load and very unresponsive especially when launching applications.

So I've compared read speed of my external SSD to the internal SSD (where it was before and where works fine):

Internal SSD: 464 MB/s External SSD: 357 MB/s

The internal SSD is about 25% faster than the external one, but when I run the external VM, loading times are much longer (even up to 3 times).

Is there anything I can do to make the external VM more responsive? Thanks!

EDIT:

Also, the T3 comes preformatted as exFAT and it is mounted through the gnome daemon. Could it be worth trying to reformat it as ext4 and mounting directly by command line?

Improve this question
2
  • Have you verified I/O latencies, too ? I would assume the USB driver could make them quite bigger. Commented Jun 1, 2016 at 12:35
  • I've just reformatted the t3 to ext4 and now the VM run just as smooth as from internal SSD. The read speed is now 366 MB/s, which is not too different from exfat, but the write speed jumped from 130MB/s to 325MB/s... I think this makes the difference. @mveroone: How do I verify the I/O latencies? Commented Jun 1, 2016 at 12:53

1 Answer 1

Reset to default
0

I've just reformatted the t3 to ext4 and now the VM run just as smooth as from internal SSD. The read speed is now 366 MB/s, which is not too different from exfat, but the write speed jumped from 130MB/s to 325MB/s... I think this makes the difference.

Improve this answer

You must log in to answer this question.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.