Hot answers tagged

5 votes
Accepted

vSphere Datastore for specific datatypes: NFS or iSCSI

First and foremost, before to mangle with storage, you should be 100% sure that your bottleneck is really related to disk/IO configuration. It this is the case, an iSCSI share can be faster than a ...
5 votes
Accepted

Max SAS throughput of a disk stack?

Theoretically max throughput of NetApp stack will be 9600 MB/sec. NetApp supports 240 HDDs per stack or 96 SSDs per stack. But it's not a system limit. You can have several stacks in one system. It ...
  • 78
4 votes

Does a NetApp NAS provide features with VMware compared to a ZFS based NAS?

Yes. vStorage APIs for Array Integration http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1021976 Check the HCL for Storage. OmniOS isn't a ...
  • 35.8k
4 votes
Accepted

Does a NetApp NAS provide features with VMware compared to a ZFS based NAS?

The VMware compatibility guide includes a comprehensive storage section that lists the supported storage solutions and provides details on what features are available for each listing. You can also ...
  • 748
4 votes

vSphere Datastore for specific datatypes: NFS or iSCSI

First things first: If you want to improve the performance of a VM you have to know where the bottleneck is. Improving storage performance doesn't help you if your environment lacks e.g. CPU ...
  • 1,612
4 votes

vSphere Datastore for specific datatypes: NFS or iSCSI

I've not heard that iSCSI is better than NFS for SQL VMs, however if you do elect to create them, I would create the datastore on the ESX level, not install an iSCSI initiator on the VM. One thing ...
  • 8,831
4 votes

Verify that a NetApp is no longer in use

To check iSCSI, use iscsi initiator show and iscsi session show. If you see anything, figure out what it belongs to and remove its access. To check CIFS, rather than timestamps, you'd want to use the ...
  • 8,831
4 votes
Accepted

Verify that a NetApp is no longer in use

What does 'sysstat -x' say, if that's essentially zero across the board (I'd try it a few times over a few minutes) then it's clear.
  • 101k
4 votes

7-Mode snapmirror status post link change

You can do it a few ways- first, check a snapmirror status -l command will tell you the completion time for the last snapmirror as well as the current progress in KB and current lag (which you can use ...
  • 8,831
4 votes
Accepted

NetApp - Snapshot Full

You should use snapshot autodelete. Without it, snapshots that exceed the reserve don't get deleted by default. Snapshot autodelete can be configured to behave several ways. The one I use is to set ...
  • 8,831
4 votes
Accepted

NetApp Backup Strategy - Snapshots to SnapMirrors to Tape?

I would advise seeing whether your backup software can initiate and manage SMTape backups from your secondary site. Even if it can't, you can use it through the Netapp CLI to back up the entire volume....
  • 8,831
4 votes
Accepted

Disable all NFS Client cache on CentOS

I think that your problem is that the cacheing that's going on is not specifically NFS-related. Here's what I see on the network when I do an md5sum of a small NFS-mounted file for the second time in ...
  • 78.9k
4 votes

iscsi multipath on CentOS 7, is it possible with existing partition

Configuring and adding multipath to existing iSCSI disk should not somehow affect data on it. You need to disconnect iSCSI target -> configure multipath on CenOS site -> and then reconnect iSCSI disk ...
  • 5,216
3 votes
Accepted

Get NetApp disk shelf serial number using 7-mode CLI

Whoop, that was fast. I did find an answer: Within the environment status command output, you can find something like this (listed after fans, batteries, etc): Environment for channel 0a Number of ...
  • 1,112
3 votes
Accepted

NetApp cluster fail to start

You've got an internal FC bus error - very likely to be a hardware issue. You'd going to have to get NetApp to fix the broken bit sorry. If you have no support contract can you let me know where you ...
  • 101k
3 votes

Can a NetApp disk array be used as a JBOD?

My solution was a bit more complicated. I was able establish a JBOD on my NetApp DS14MK4 (14 x 450GB) using an HP Qlogic QLE2462 HBA on an Ubuntu 16.10 box using the following commands (some settings ...
3 votes

NetApp filer - resetting NTFS permissions with fsecurity?

if you take here 2 and not 0 as in the example cb56f6f4 1,0,"/vol/vol_name/qtree_name/subdirectory",2,... then you can replace all permissions by only the new one. !Be carefully with it you will ...
  • 31
3 votes
Accepted

Do I need btrfs scrub if a lower layer also scrubs?

There's no value in using your own scrubbing- in fact, it could cause a lower cache hit ratio and reduce performance on production IO. Everything that you would protect against is already better ...
  • 8,831
3 votes
Accepted

Which SAS JBOD module for NetApp DS4243?

It's an IOM3 X5712A-R6 I believe
  • 101k
3 votes

Disable all NFS Client cache on CentOS

Assuming you're testing fpolicy and are simply looking for a way to reliably generate some traffic, I would skip the OS NFS stack completely and just use a python script using libnfs or something. ...
  • 8,831
3 votes
Accepted

VMware with 1gbs network interface with NFS in Netapp with 10gpbs and Control Flow

Flow control needs to be active on all host and switch ports to work. The best solution would be to upgrade the host ports. With flow control active, you may experience head-of-line blocking when ...
  • 9,152
2 votes
Accepted

Premature SMB/CIFS Session Close (System error 1312) with Password on SMBv2

Unfortunately there was no real solution to this problem, as NetApp does have a case open with Microsoft for Windows Server 2008 using SMBv2 or SMBv3. The only workaround for this particular bug was ...
  • 160
2 votes
Accepted

NetApp filer - lots of 'low water mark' CPs triggering on idle filer

Open a ticket- this is an indication that there's a lack of system memory, and if there's little work being done and you still had boxes go unresponsive, there's something screwy happening. I've ...
  • 8,831
2 votes
Accepted

How do I configure a CIFS only NetApp filer for ssh public-private key access?

The thing that you're missing is that the filer is being very literal in terms of finding an authorized_keys file. Specifically it looks in: /etc/sshd/username/.ssh/authorized_keys The problem here ...
  • 3,707
2 votes

Max SAS throughput of a disk stack?

SAS 6 implies not 600mb. SAS uses 4 channel per cable and a disc can be connected to 2 cables at the same time. That gives you 4.8 gigabyte/second out of a disc.
  • 51k
2 votes

Migration to Cisco Nexus 3064-T

Sadly I don't know. If you are planning to put any iSCSI traffic on the N3064 update your question or add a comment because I know a lot about that. Intel X540 based NICs definitely work with the ...
  • 2,831
2 votes
Accepted

When it makes sense not to setup quota on NetApp volumes?

With no quota defined you can fill up all your storage in a few minutes. The consequence of this would be that you will have to quickly make some clean or buy another storage extention cabinet to ...
  • 13k
2 votes

NetApp API to fetch 'df' output

Having been chipping away at this problem, and with thanks to the excellent "toasters" mailing list (Archive) - my eventual solution was to make use of the system-cli API call. #!/usr/bin/env perl ...
  • 3,707
2 votes

How to delete files on NetApp ONTAP 7 by using CLI

Deleting files inside the server that uses the LUN will not necessarily free up space. VMWare leaves data from its deleted files all over the disk, dereferencing deleted files without actually ...
  • 8,831
2 votes
Accepted

How to delete files on NetApp ONTAP 7 by using CLI

Although I didn't find a solution for deleting files directly by using the CLI, I discovered some old snapshots. I was able to delete those old snapshots by using the CLI and that gave me some free ...
  • 1,091

Only top scored, non community-wiki answers of a minimum length are eligible