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Monday, January 28, 2013

Hyper Terminal Parameter settings while configuring a SAN switch initially


Open the terminal emulator application and configure as follows:
For almost all MS Windows  95, 98, 2000, or NT environment systems:
Bits per second: 9600
Data bits: 8
Parity: None
Stop bits: 1
Flow control: None

Wednesday, January 23, 2013

Netapp Deduplication

The best way to understand Netapp Deduplication through the below picture 



Ping Throttling threshold value in Netapp Storage systems


If your storage system supports a very large number of CIFS clients that use
ICMP pings to determine CIFS shares accessibility, you might need to increase
the ping throttling threshold value in the ip.ping_throttle.drop_level option

FAS01> options ip.ping_throttle.drop_level number of packets per
Second

Default value is 150

Sunday, January 20, 2013

What is the maximum size of the aggregate?


  • 2040/3040/3070 - 50TB
  • 2240 - 60TB
  • 3210/3140 - 75TB
  • 6030/6040/3270/3170 - 105TB
  • 6070/6080/6210/6240/6280 - 162TB

Thursday, January 17, 2013

One Particular user was not able to access the Netapp CIFS shares from any machine


My filer FAS2040 on my Domain has got CIFS shares set up as well as other network drives. I'm having problems with a single user not being able to access the Filer on multiple machines.

I have started troubleshooting this from the permission level but everything was fine from the permission perspective and was scratching my head what happened as other users were able to access the same CIFS shares and network drives of the same filer except one user.

Then I realized he went on leave for PONGAL HOLIDAYS (Joking !!)  this is the only difference between that user and the rest of users this is where the CLOCK GOT MORE THAN 5 Mins during he was on holiday and other users were not affected because they already logged during that time as they already authenticated and were working off of cached credentials.


I have just used the below command to reset the NTP server now the user is able to access the shares with full access JFAS01>options timed.servers  timeserver1

How to set Netapp filer to Sync with NTP server


In the first example below it was set to use RTC ( Real time Clock )
FAS01> options time
timed.enable                 on         (same value in local+partner recommended)
timed.log                    on         (same value in local+partner recommended)
timed.max_skew               5m         (same value in local+partner recommended)
timed.min_skew               0          (same value in local+partner recommended)
timed.proto                  rtc        (same value in local+partner recommended)
timed.sched                  1h         (same value in local+partner recommended)
timed.servers                192.168.0.9 (same value in local+partner recommended)
timed.window                 0s         (same value in local+partner recommended)

To change this to use the NTP server  

FAS01> options.timed.proto ntp

filer0*> options time
timed.enable                 on         (same value in local+partner recommended)
timed.log                    on         (same value in local+partner recommended)
timed.max_skew               5m         (same value in local+partner recommended)
timed.min_skew               0          (same value in local+partner recommended)
timed.proto                  ntp        (same value in local+partner recommended)
timed.sched                  1h         (same value in local+partner recommended)
timed.servers                192.168.0.9 (same value in local+partner recommended)
timed.window                 0s         (same value in local+partner recommended)


Thursday, January 10, 2013

Script for monitoring Disks usage In Netapp

#!/bin/bash
FS=dumps
USAGE=`df | grep $FS | awk '{ print $4 }' | sed "s/%//"`
PERCENT=90

if [ $USAGE -gt $PERCENT ]
then
echo $FS Filesystem on NetApp has reached "$PERCENT"% capacity 
fi

Tuesday, January 8, 2013

In Netapp to change FC initiator port to target port

In the Filer by default all ports will act as Initiators in order convert the required ports use the below command

FBTFAS01> fcadmin config -d 0d

FBTFAS01> fcadmin -t target 0d

These changes will be effective only after rebooting the filer 

Thursday, January 3, 2013

Netbackup Error 99 NDMP Backup Failure


We have a Netapp box which is serving CIFS shares to our clients.

We have faced a  NDMP backup job failure with error code 99.
When opened the failed job detailed status i found it as below.
12/30/2012 10:16:03 PM – Error ndmpagent(pid=7869) ndmp_authenticate_connection: ndmp_connect_client_auth failed 12/30/2012 10:16:03 PM – Error ndmpagent(pid=7869) failed to connect to NDMP server FAS2040 , connect error = -1009 (NDMP server login failed – verify attributes with tpautoconf -verify)

This happened due to i have changed the Netapp ROOT password ( Forget to update the same in Netbackup ) through which Netbackup agent authentication happens to backup CIFS, 
Here is the place we need to change this settings in Netbackup Console.



What Happens when we Enable REMOTE MIRRORING in IBM DS4800

As soon as we set Remote Mirroring to active it will have the following impact.

Hosts using host port 0 will be logged out as the host port is reserved for mirror data transmissions. Host communication through this port will be rejected as long as Remote mirror is active.