Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Enabling CRC Checksum on Synology for ESXi

Posted on 2014-03-06
3
1,621 Views
Last Modified: 2014-03-11
Hi
What do you think about enabling CRC Checksum on Synology NAS that works as iSCSI Target for VMware ESXi host?

I have two options
[_] Header digest
[_] Data Digest

I can't find on google if it is recommended to have it ON, or have it enabled could lead to some issues?
0
Comment
Question by:Martin Tarlink
  • 2
3 Comments
 
LVL 13

Expert Comment

by:Abhilash
ID: 39911805
May i ask what is the reason to enable the CRC Checksum?
0
 
LVL 5

Author Comment

by:Martin Tarlink
ID: 39915942
I do not have a reason that why I ask  here if anyone use if and for what purpose.

I test it already and the moment I enabled it ESXi lost connection with iSCSI Target.
0
 
LVL 13

Accepted Solution

by:
Abhilash earned 300 total points
ID: 39916032
Its basically for high resiliency. This will enable iSCSI Initiator and Target to conduct CRC bit checking.
It is for those environments that cannot tolerate errors.
It should not cause any issues if you enable it but one of very old VMware KB Articles suggests that if data digest id enabled on iSCSI the Windows machines may not work well.
Refer the below KB. Not sure if it has changed
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003043

Also this will cause a high usage of CPU on NAS. If you don't have a reason i would suggest you not to enable it. Or may be you could try. But since you said its causing issues you better not mess around with it.
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
VM edit 2 37
VMware Workstation: VM doesn’t start 6 90
VM delta disk 2 18
Horizon View Access Points (Unified Access Gateway) Certificate issue 1 16
When rebooting a vCenters 6.0 and try to connect using vSphere Client we get this issue "Invalid URL: The hostname could not parsed." When we get this error we need to do some changes in the vCenter advanced settings to fix the issue.
Many businesses neglect disaster recovery and treat it as an after-thought. I can tell you first hand that data will be lost, hard drives die, servers will be hacked, and careless (or malicious) employees can ruin your data.
This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …
This tutorial will walk an individual through the steps necessary to enable the VMware\Hyper-V licensed feature of Backup Exec 2012. In addition, how to add a VMware server and configure a backup job. The first step is to acquire the necessary licen…

808 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question