Not able to increase the volume -- fs_size_fixed

When extending or increase the volume size we get some times java error showing fs_size_fixed
This option is set sometimes if the volumes are set up in snapmirror state , to avoid accidental increase of volume size.

Netapp-box> vol options vol_name
nosnap=off, nosnapdir=off, minra=off, no_atime_update=off, nvfail=off,ignore_inconsistent=off, snapmirrored=off, create_ucode=on,convert_ucode=on, maxdirsize=31457, schedsnapname=ordinal,fs_size_fixed=on, guarantee=volume, svo_enable=off, svo_checksum=off,svo_allow_rman=off, svo_reject_errors=off, no_i2p=off,fractional_reserve=100, extent=off, try_first=volume_grow

Any difference between RLM and System Console??

RLM and Console are the two types of Remote access to Netapp. There is no difference if we access the console directly by Console connection or through RLM

To access the Console through RLM Port .We have to use the command "system console" from RLM prompt.

RLM features which are not possible in Console

o SNMP traps
o Autosupport
o RLM's System Event Log.
o SSH protocol access

For more information :http://now.netapp.com/NOW/knowledge/docs/ontap/rel7311_vs/html/ontap/sysadmin/accessing/task/t_oc_accs_access-console-rlm-bmc.html

Tape Drive Configuration with Netapp

Have done Upgrade of Netapp from 7.2.2 to 7.2.6.1p8 . It was a nice experience . Last week was very hectic with many major Global activities. Upgradation of netapp , DC shutdown and solving the by products of these activities a major task.

Configuration of tape drives to netapp was also a good experience.
Configuring Tape Drives to Netapp :
Migration of Netbackup to Networker - so there was a requirement for the reconfiguration of Tape drives.
Advanatage of Netapp is it automatically detects the tape drives.

There are two ways of configuring the tape drives .
1. we can directly attach the tape drives
2. Introducing a fabric in between the Netapp and Tape.
We need to find out how many ports are available on the netapp box . First and then ask the site services guys(Hands & Eyes ) team to connect the tape drives to the free ports .

The free ports on the netapp can be found by using the Command "SYSCONFIG"
Normally we have FC adapters.
When directly attaching the Tape drives to the Netapp - we can attach only one drive for a single adapter. When use the fabric in between we can zone the adapter to the two switch ports for which the tape drives are connected to the two ports. I took two tape drives as example.

To find out the tape drives connected to the netapp we can use "storage show tape"
...

Please post your comments and i have intentionally skipped many points here. So that i can find out how the ideas are flowing and what are the doubts that normally float in mind.
Thanks,
Maddy

SnapShot

A faster and more popular approach to snapshots is COW, also called "pointer snapshots." A pointer snapshot does not copy data. Instead, it simply records an index of data locations on the volume being protected. This requires far less storage space then a full copy. In most cases, the storage space allocated for a snapshot volume is only about 30% of the data volume being protected. "There's nothing in it [the snapshot volume] other than some system-oriented metadata that the system needs to manage this whole environment," says Arun Taneja, consulting analyst and founder of the Taneja Group. For example, it would take up to about 30 GB to protect 100 GB of primary storage, bringing the total storage needs to 130 GB. Low storage demands also mean that pointer snapshots are quite fast, so the production network is not interrupted for more than just a few seconds. This combination of low storage requirements and fast performance make pointer snapshots ideally suited for frequent use, allowing for low RPO.