ESX 4 and iSCSI problem

[miguel]

Same problem here.. DS1010+

[matarvai]

Same problem here.. DS1010+

Everything has worked with me after I started taking backups to different NAS. If I took backups to same Synology diskstation where I had some iscsi disks the iscsi failed. After I disabled this diskstation from backup destination everything works fine. Bad thing is you need to buy another diskstation for backups and another one for Iscsi targets.

[kacole2]

I have the same exact issues. DS411+ and ESXi 4.1 with the latest update and DSM3.0. If i start putting a load on iSCSI, then the conenction drops. I can still access NFS datastores, but I have to reboot my DS411+. If I try to restart the iSCSI service within the GUI, it times out. I try to reboot and it hangs so i have to hold down the power button to restore the NAS. this is less than optimal.

[kacole2]

With the help of Synology support I was able to get this problem resolved.

Fixing Synology DS411+ iSCSI Connection Drops for VMware ESX

[jgallagher]

I had a somewhat similar issue with a Synology RS810 rack mount NAS in which when the NAS was rebooted I lost my NFS mount (grey in VC) and I would have to jump through hoops to get it back.


That brings me to the question :Why are you guys choosing ISCSI over NFS for VMware ? At least my device is on the VMware ESX HCL for NFS. It doesn't seem any Synologys are ISCI certified

[NapO]

hey guys,...same problem over here.

ds1511+ dsm 3.0 and a ds1511+ with dsm 3.1 same setup, same problem.

2 vmware servers, and one ds1511+ (2 times)
1 iscsi LUN with 2 targets (both vmware servers)
enabled the multiple iscsi connections

when one esx 4.1 boots, no iscsi partitions avail. have to do a rescan on storage adapters.
then add storage (on storage tab), select the synology LUN, keep existing sig. and then it s back.

on second server, bigger problem, same as above only with the ADD storage (on storage tab) you see the iscsi LUN, when you add it wants to format??!!!

come on synology please make a stable iscsi VMWARE shared storage, because this takes a lot of frustration and time to reboot, try, reboot, try, disable, enable...and so until it works again...

[jgallagher]

Napo why are you choosing iscsi over nfs? for your vms?

[NapO]

after some googling i found this article:
http://www.kendrickcoleman.com/index.ph ... e-esx.html

i m going to test the downgrade of de LIO? through a patch from synology.
let you know what happens...

[NapO]

Napo why are you choosing iscsi over nfs? for your vms?

uh..nfs was for the early days, it makes no diff in my humble opinion.

(for throughput i dont have any problems, (got 168mbyte troughput performance with link agg enable. no jumbo frames)
but if you partitions are nt available, you dont have anything on a high throughput...

[NapO]

after some googling i found this article:
http://www.kendrickcoleman.com/index.ph ... e-esx.html

i m going to test the downgrade of de LIO? through a patch from synology.
let you know what happens...

i tried the .pat file from the link and looks good, the iscsi partition were recognized after reboot.
if it is coinsendence i m not sure, the other set i ll wait to upgrade. (cause of maintenance schedule)

[jgallagher]

Its really not a NFS old VMFS new. Its two dif file systems vmware supports. VMFS has more features for certain things. Off the top of my head thin provisioning. I was curious of what people were specifically using to make them go away from Vmware HCL certified device (a synology NFS) to a non HCL certified device (synonolgy ISCSI/VMFS)

This downgrade .pat that you did was it on 3.1 software which has been released lately? Curious if the 3.1 fixes the issue without the downgrade

[NapO]

What i did is installed the DSM 3.1, and still got the problem that i lose my iscsi partitions after reboot.
Then applied the hotfix .pat file (as in the link) and it looks that this will do the trick, after reboot i didnt lose my iscsi partitions after a vmware reboot.

[NapO]

i did nt lose the partitions anymore after reboot, but it is still not 100% reliable.
My Vcenter vmx and so on is running on the iscsi partition, and after heavy load i ll completly lose control over the iscsi connection. it stays there but the vm's running on the iscsi vmfs are non responsive and i need to reboot the synology to disconnect all sessions and after reboot it looks normal again.

This really sucks because it s not reliable!!!! enterprise disks, biggest synology,...and what you get is not working 100%. come on guys,...fix it,...let me know what to do!

[NapO]

ok guys, little update on this topic.

IT STILL SUCKS!!!...

so...says enough huh?
needed to reboot due maintenance (the esx host) and after reboot the iscsi partition is gone again...when is synology going to address this f*cking problem, i m really pissed...

what do we need to do the let them look at this, and not a new firmware for ie9 support,...come on!
i saw today that there is a new firmware, i red the release notes and nothing about iscsi. still i m going to update it in the hope that it will give a better iscsi life.

FIX IT synology,....

[Seaman]

Same Problem here.

Connecting 2 ESX4i Servers each through iSCSI MPIO (Round Robin) And no stable iSCSI connection.
All of a sudden the connection is gone

Environment

2xESX4i
Synology 1511+ (LAN 2 in different Vlan for iSCSI traffic)
HP procurve 1810G switch

Waiting for Solution