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Setup
I am trying to achieve the following setup but I am not sure wether or not it is possible: Create an iSCSI target to connect my ReadyNAS Ultra 4 to a server, but I want to use the ReadyNAS to copy from certain shares on to the the iSCSI volume whereas I can use backup exec on the server reading directly from the ReadyNAS via iSCSI. I am welcome to any simpler ideas as I imagine there are many out there.
RN3220 / RN4200 Crippling iSCSI Write Performance
I've got a mixed OEM ecosystem with several Tier 2 RN3220's and RN4200's along with Tier 1 EqualLogic storage appliances. All ReadyNAS appliances have 12 drive compliments Seagate Enterprise 4TB drives in them. I wanted to be able to use the ReadyNAS' as iSCSI options, particuarly for maintainance cycles on the storage network, so I re-purposed them from NFS use. Factory reset them onto 6.6 firmware and they have subsequently been upgraded to 6.7.1 with no change in symptoms. The drives have no errors It's a new install, so there are no fragmentation issues etc. The NAS's use X-RAID I've set them up with 2 NIC 1GbE MPIO from the Hyper-V side (I've also tried it on 10GbE and on 1 NIC 1GbE with no impact). 9k jumbo frames are on There are no teams on the RN's Checksum is off Quota is off iSCSI Target LUN's are all thick Write caching is on (UPS's are in place) Sync writes are disabled As many services as I can find are off, there are no SMB shares No NetGear apps or cloud services No snapshots The short summary of the problem is that if I migrate a VM VHDX storage from the EqualLogic on to any of the ReadyNAS appliances, accross the same storage network and running from the same hypervisor, the data migration takes an eternity and once the move completes the write performance is uterrly, utterly crippled. Here are the ATTO stats: Same VM, on the same 1GbE network. In the case of the above over 1x 1GbE, single path, all running on the same switches. Moving the VM back to the EqualLogic storage takes a fraction of the time to move and the performance of the VM is instantly restored. According to the ATTO data above the ReadyNAS should be offering better performance than the substantially more expensive EqualLogic, however in this condition these units are next to useless. If I create an SMB share and perform a file copy of the storage network, I can get 113MB/s off of a file copy on a 1x1GbE NIC, with no problems. So it does not look like a network issue. Does anyone have any ideas? I have one of the 3220's in a state that I can do anything to. The only thing that I haven't done is try Flex-RAID instead of X-RAID, but these numbers do not look like a RAID parity calculation issue. Many thanks,
Deleting and adding iSCSI LUNs
I have the following: ReadyNAS Pro 6 RAIDiator 4.2.27 X-RAID2 with 6 disks Server 2008R2 with native iSCSI initiator 4 iSCSI drives; E:, F:, G:, H: PROBLEM: I no longer use or need E, F & G drives and went to delete these 3 targets on the ReadyNAS. It looks like I can't just delete one drive target because all 4 belong to the same LUN0 and it looks like it is really deleting LUN0, not the individual target drive. Here is the message I get... "Deletion of the iSCSI LUN 0 device will wipe out all the data residing on it and will remove the iSCSI target device. If you are sure you want to do this, please type DELETE ALL LUNS and click Apply.Enter "DELETE ALL LUNS" if you want to delete all LUNs in this target." Does anyone know how to delete the 3 targets and leave the 4th target and LUN0? I don't know but I am guessing the second target should have been created on LUN1, third on LUN2 and so one but I did not see a way to select LUN number on a target during a test. Thanks Jan
iSCSI Authorization failure
We purchased a Readynas 3100 of 8TB (5.5 TB usable storage) to use in an ESX environment of 4 ESXi servers and 25 VMs. (mainly linux, but a couple of windows servers as well.) -I created 1 iSCSI target and 3 LUNs. (Since ESX cannot VMFS format disks larger than 2TB) -I Enabled the "Access Control" (to support multiple hosts simultaneously) -I did not configured CHAP authentication Before installing the storage server in the data center I wanted to test the iSCSI connection from my windows 7 workstation. After entering the IP address I discover the Target. But when I want to connect I get "Authorization failure" :( How can that be since I haven't configured CHAP? All information is welcome. ------------------------- An extra question on the side. I configured 1 target and 3 LUNs. is this the bast way to go? Or is it better to create 3 targets with each 1 LUN? :? Now I can easily change this, once live in production I can't anymore.
RN2120/Win2008R2 - iSCSI errors (disk event 51)
Hi, I am experiencing a massive outage with RN2120. It has 3 iscsi LUNs dedicated to 3 W2008R2 servers - one physical and 2 virtuals, running in Hyper-V environment. Everything worked like a charm for ~6 months, but now there is a weird problem - time to time all 3 windows systems get LOTS of warnings DISK event 51 - page exchange error - and sometimes shares get disconnected. After I reboot everything, things get back - but after randomly short period of time I get the same warning - and disconnection of LUNs. The problem is one of the LUNs is exchange server database - and such a behavior is extremely bad for exchange. Servers and NAS are connected to the same 1Gb AlliedTelesis switch (which is basically in factory settings - no vlans/routing etc). NAS shows up as "healthy". ANy ideas would be much appreciated.
