Forum Discussion

Aspirant

Oct 06, 2015

ReadyNAS 4220 Locking up RAID 10 and ISCSI

Hi We got a 4220 as a big storage box with decent perf to go with an HP 3par in our 3 node Windows server cluster. It is running over ISCSI. We bought a Netgear M7100-24X 10GB switch to go with it....

Business Discussions

iSCSI

Using with a Virtual Hypervisor

Toyonut

Aspirant

Oct 06, 2015

Sorry, forgot to mention we are using thick LUN's.

Following a comment here:

https://community.netgear.com/t5/ReadyNAS-in-Business/readynas-516-idoes-not-work-well-with-vsphere-5-5-WHY/td-p/936304

I am going to try it with checksum disabled too.

Toyonut

Aspirant

Oct 06, 2015

We are running 6.2.4, I see here: http://kb.netgear.com/app/answers/detail/a_id/29938 that 6.4.0 is released, is that a final release now? Should I try that to address any BTRFS and ISCSI issues that are fixed according to the changelog?

StephenB
Guru - Experienced User
Oct 07, 2015
6.4 is now released.
- Toyonut
  Aspirant
  Oct 07, 2015
  Cool, thanks. I have installed it this morning and provisioned a new 8TB iscsi lun on my freshly build RAID 10 volume. It has got a few VM's on it. Now we wait...
  - kohdee
    NETGEAR Expert
    Oct 08, 2015
    If you're running VMs, set sync writes to disabled, make sure it is a thick LUN, no snapshots, no bit rot protection, and be on 6.4.0. This should increase the performance of your VM as well as keep the file system less-able to become fragmented. Being fragmented is a huge cause for lock-ups on copy-on-write file systems.
    
    Also set up a defrag and balance schedule to keep your volume clear from fragmentation. Have it run defrag then balance in that order during a time of least use.
    
    Hope this helps.