About aborzenkov

aborzenkov · ‎2012-04-22

After OS is booted failover is implemented using multipathing support on OS level. You have to configure OS to use redundant pseudo-device and not physical paths. If your question is about ESX, VMs usually are not even aware of multiple paths. They just see VMDK presented as connected to single controller. Here failover is completely handled by hypervisor. Could you provide link to Emulex Multi-Port Failover Boot description?

aborzenkov · ‎2012-04-21

Right. If you have multiple stack, interconnect (daisy chain) all stacks and connect two remaining ports on the first and last shelves.

aborzenkov · ‎2012-04-21

Actually, the guide is quite clear. Controller-to-stack connections: Each storage system controller is connected to each stack of disk shelves through a dedicated Ethernet port: - Controller 1/A always connects to the top shelf IOM A square port in a stack. - Controller 2/B always connects to the bottom shelf IOM B circle port in a stack. In essence, you daisy all IOMs of all shelves and then connect two remaining ports to both controllers. If you have single controller, you connect just one port. How exactly you daisy chain does not really matter, but keeping suggested order makes it easier to support.

aborzenkov · ‎2012-04-21

According to bug compare tool, there are 6 fixed bugs between 8.1RC3 and 8.1.

aborzenkov · ‎2012-04-20

xdrcalls are calls that could not even be decoded by RPC layer. badcalls are calls that have been decoded but rejected.

aborzenkov · ‎2012-04-20

Most TRs are available on http://www.netapp.com/library; no account is needed to access them. Some are restricted access and can be downloaded from fieldportal only; you need to be partner to have access to fieldportal.

aborzenkov · ‎2012-04-20

I would do it exactly the same way. Are ports on Brocade already configured?

aborzenkov · ‎2012-04-20

Personally I would rather wait for 8.1.1 or even 8.1.2 before upgrading, unless some features are desperately needed.

aborzenkov · ‎2012-04-20

When disk failed, aggregate should have been rebuilt on spare. Now new disk will become spare. If auto assignment did not happen (e.g. because stack is shared by two controllers), you need to assign disk to controller explicitly using “disk assign” command.

aborzenkov · ‎2012-04-19

Is 3270 complete with new disk shelves or you are doing just head swap?

aborzenkov · ‎2012-04-19

8.0P3 is really old now; do you have any reasons to not upgrade to the latest stable 8.0.2P6? But we have these problem also in pure Windows environment, without any NetApp involved, so I suspect this is Microsoft issue.

aborzenkov · ‎2012-04-19

Do you have LUN with the same name on destination volume?

aborzenkov · ‎2012-04-19

Documentation lists commands used by ASUP. You can use this list for a start.

aborzenkov · ‎2012-04-19

Do you run OCSM 2.0.1? There was at least one problem related to saved credentials that was fixed in this version.

aborzenkov · ‎2012-04-18

https://kb.netapp.com/support/index?page=content&id=1010317

aborzenkov · ‎2012-04-18

Just curious - which default? In CLI you have to list initiators explicitly. FileView last time I tried it presented only initiators connected to local filer. May be OCSM behavior has changed, but I do not dare to use it for configuration

aborzenkov · ‎2012-04-18

You have to add to igroup on filer-1 initiators connected to both controllers (filer-1 and filer-2)

aborzenkov · ‎2012-04-18

It is not in any way Cisco specific. Emulex HBA could use it since the very first day I met them (I think at least Linux dropped support for IP now). Brocade switches always supported in-band management as well (and of course could forward IPoFC from HBA). Actually, even NetApp used it for SnapMirror over FC

aborzenkov · ‎2012-04-18

Is this limit enforce by OCSM, or is it just arbitrary number because there has to be some limit? ☺

aborzenkov · ‎2012-04-17

Yes, it is possible. You may have issues with home directories though; see if these articles help: https://kb.netapp.com/support/index?page=content&id=1011050 https://kb.netapp.com/support/index?page=content&actp=LIST&id=2012332

aborzenkov · ‎2012-04-17

It is not possible to give blanket answer. Less snapshots will likely take up less space, and the longer snapshot is kept the more difference is accumulated (i.e. snapshot “grows”). But again - it is possible that there is large amount of transient data generated at specific (time of) day which is captured by frequent snapshots, but weekly snapshot capture mostly the same static information and so does not take any space at all. YMMV … you have to experiment what is better suited for your specific conditions.

aborzenkov · ‎2012-04-17

I noticed that for SAS shelves load balancing is done per-shelf, as opposed to per-disk for DS14 (i.e. all disks in one shelf are shown as having the same primary port). Just wanted to confirm - is it by design? This is with 8.0.2P6 7-Mode.

aborzenkov · ‎2012-04-17

Well … I am not sure I understand the question. Could you explain what is unclear to you?

aborzenkov · ‎2012-04-16

Do you have aggregate snapshots?

aborzenkov · ‎2012-04-16

Well, you have one (or combination) of - disk writeback is too slow - your filer receives more data than it can physically write to disks So the first step is to analyze disk write performance. In the former case it may be possible to increase it without adding more hardware (e.g. fragmentation may impact disk performance by inducing more disk IO than is necessary). In the latter I am afraid throwing in more hardware and redistributing data between old and new is the only option.

Re: emulex boot from san- failover

Re: ACP cabling with a FAS2040

Re: ACP cabling with a FAS2040

Re: 8.1GA release

Re: Nfsstat -s many TCP badcalls, no UDP or IPV4 or IPV6 badcalls

Re: Secure configuration of NetApp product in DoD environment

Re: adding shelves to existing MetroCluster with Brocade 200's

Re: FAS2240, aggregation group and HA pair

Re: Add disk to aggregate

Re: Migration from old to new Filer

Re: NetApp 8.0P3 - random CIFS locked files

Re: failing to move LUN between volumes with NDMPCOPY

Re: NetApp Systems Health Check

Re: Support for IE9 and FF11 in OnCommand System Manager 2.0.1 ?

Re: How to resize a snapmirror volume?

Re: [FAS3140]How to share a single LUN across two filers

Re: [FAS3140]How to share a single LUN across two filers

Re: FC in NAS

Re: Maximum Number of Controllers which can be managed by OnCommand System Manager?

Re: FTP ON NETAPP FILER (( AUTH )

Re: Snap shot policy Diffrence ?

Load balancing for SAS shelves?

Re: Snap shot policy Diffrence ?

Re: Deleted FlexVol, aggregate won't release the space

Re: LogFull CP - what exactly happens?