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Forum Discussion
ReadyNAS Netgear 2120 Stops responding to all traffic (iSCSI / Web interface) #25509387
I have a RN2120 running 6.2.4 with 4 2TB disks. (one of 5 that we have running in our estate, none of the others I'm experiencing this on) This unit is 2 years old.
I started to see this behavi...
this is a business level device with a business level OS not a PC. None of the equipment used in this configuration is 'personal' in any way.
All I want to do is use the max available space on it as an iscsi target. I don't mean to come across rude here, but I'm now in a situation where through no fault of our own we're being told that the 7 readynas devices (we also have devices from lenovoemc/qnap which do not have this problem) we have can't be used in the same way that we have always previously used them, e.g. just to use all the available space as an iscsi target.
Worse still, is that this device completely locks up/freezes when a configurable option is set from within the GUI, which makes me feel that this is not a business level product. It is unacceptable and unfair to pay for installation services because a bug exists in the software and is undocumented.
Even worse; I'm being told to pay for a support contract to be told the same. I'm losing 1.5TB of space on this device because the OS is restricting the use of 300GB and then being told that I can't use 20% of it. Undocumented in the product technical details for this device.
I have no use for metadata. I do not need snapshots. Essentially I want to use this device as a storage header for our backup solution, veeam backup and replication. Everyone keeps jumping on the "80%" usage bandwagon to me, but this device has worked fine in this configuration for 18 months before the freezing issue occured.
So, on my entire readynas fleet, am I now going to have to go back retrospectively and change everything?
Have been running into similar problems across a mix of 2100, 2120, and 3220 units since November 2014. Units will hard freeze under heavy I/O (also from Veeam backup) and need to be power cycled to recover.
We have mostly stabilized the units by making sure that none have any kind of teaming configuration and all have jumbo frames disabled (which is a noticable performance hit, especially with Veeam!). One 2100 never stabilized and was replaced with a Dell R530 stuffed with SATA disk.
With the exception of the 3220, all devices had 1 or more years of stable usage with no lockups (in one case it was over 4 years).
The oldest device (and the one eventually replaced with other hardware) was swapped out by support around November of 2014 due to a perception the NIC may have gone bad based on symptoms. The swap didn't help which is when we figured out that disabling any teaming and jumbo frames seemed to help with stability. This network was already properly configured for jumbo frames and was running an Equallogic SAN without issues, so we knew that the network itself wasn't a problem.
I don't have an answer for you and share your frustration. My best guess is that a bug was introduced in the software released around November 2014 and under heavy networking loads the units are crashing the network stack. I think it's persisted as long as it has because the units do poor fault reporting and the overwhelming customer base probably doesn't load them very hard.
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