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iSCSI as storage for ESXi

iSCSI over TCP/IP.
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drnicolas
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iSCSI as storage for ESXi

#1

Post by drnicolas » 05 Feb 2016 21:00

I have my NAS4Free-machine and also an ESXi 6.0-machine running.

At the moment I am running out of disk space and therefore thinkig of using some of my NAS-space for the VMs.
One of the easiest ways is using a NFS share - this works for backups already.

Is iSCSI a better way ?
Do I need a second NIC on the NAS and also on the ESXi. I think of directly coupling NAS4free and ESXi with separate NICs.

Is there something to consider when configuring the iSCSI-system for ESXi ?
HP Proliant N54L - Bios Mod -16GB non-ECC-RAM - ZFS RAIDZ1 (3x3TB) - 1VM running XigmaNAS 11.2.0.4.6026

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STAMSTER
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Re: iSCSI as storage for ESXi

#2

Post by STAMSTER » 11 Apr 2016 04:00

Hypervisor typically does only sync writes, which will cause heavy performance issues if you don't have L2ARC / ZIL devices for cache.
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drnicolas
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Re: iSCSI as storage for ESXi

#3

Post by drnicolas » 12 Jun 2016 20:42

It has been a while since I worked on the problem.

1. My research gave the result that possibly ESXi has trouble with old partition data on the iSCISI-device.

Therefore I would like to know what I can do to wipe the ZFS partition which is prospectively used for the iSCSI connection.


2. What should I do to install such a L2ARC device ? How do I activate Sync writes ?
HP Proliant N54L - Bios Mod -16GB non-ECC-RAM - ZFS RAIDZ1 (3x3TB) - 1VM running XigmaNAS 11.2.0.4.6026

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STAMSTER
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Re: iSCSI as storage for ESXi

#4

Post by STAMSTER » 08 Jan 2018 16:41

Have you made some improvement on this topic? I haven't been active here for almost two years....
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drnicolas
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Re: iSCSI as storage for ESXi

#5

Post by drnicolas » 22 Jan 2018 19:59

Sorry for the late answer.

Yes, I succeeded and have a storage runnning via iSCSI.

On very important thing was a problem, that my NIC always failed due to a wrong setting for MTU!

Now, a re-boot is no more a problem!

But I cannot giv you a good how-to. OPtions for iSCSI are not straight forward in ESX.

I recommend first setting up iSCSI on your NAS-box. The configure it with WIndows Server or Windows 10
If this works, then move on to ESXi
HP Proliant N54L - Bios Mod -16GB non-ECC-RAM - ZFS RAIDZ1 (3x3TB) - 1VM running XigmaNAS 11.2.0.4.6026

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