Issue description:

Disk drives disappear i think its connected to issue #986

What happens

I dont know if its a crash or server restart but after one of those the disks are gone from the disk drive.
this is the second time it happend , I was thinking that first time was a random bug, but after second time in 2 weeks, its a problem.
edit :
after more checking its not only the disk drives that disapear but also the crafting patterns, speed upgrades. network cards...

What you expected to happen:

disks don't disappear

Steps to reproduce:

i cant tell how to reproduce since i don't know the precise time , i can only guess that it had something to do with a server restart or a crash.

...

Version (Make sure you are on the latest version before reporting):

• Minecraft: 1.11.2
• Forge: 1.11.2-13.20.0.2265-universal
• Refined Storage: refinedstorage-1.4.2

Does this issue occur on a server? [yes/no]
yes

If a (crash)log is relevant for this issue, link it here:

i dont know if it can help but this is the last crash log before the disks went missing
i can provide the server log if it can help.

crash-2017-04-30_15.28.23-server.txt

Also the server log when the bug happened:

log.zip

Duplicate of #986
Please check previous issues and contribute there before making new ones