San: Left Hand from HP


1) The consultant just installed the "Left Hand" for our Storage SAN
2) The consultant need to download the iscsi initiatior (from google)
3) My question:
What is the function of this "iscsi initiator"? Is it a Management console or what? Please explain a little bit of this "iscsi initiator"? (Why do we should download it in the first place?)
4) Thank you

Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

iSCSI Initiator is the software that enables connection of hosts (initiators) to an external iSCSI storage array (target) using Ethernet NICs.

Here is a link for further informations, although it is Microsoft oriented and regards Microsoft's iSCI Software initiator:
The software iSCSI initiator would be installed on any of your hosts (servers) that need to mount a SAN volume from your LeftHand SAN.  This allows you to use a standard Gigabit Ethernet port to communicate with the SAN vs buying a dedicated (and more expensive) "hardware" initiator.

If you use VMware, you would likely use the built-in software initiator to mount VMFS volumes presented from the SAN.

If your LeftHand has the newest (SAN/iQ 8.5) software, the application integrated snapshots can "talk" to your Windows operating system (through the software initiator), so that when you want to snapshot your data (any VSS data like SQL database or Exchange Information Store) the SAN will politely ask the OS to quiesce the application to a consistent recovery state.

To see an example of how you use the iSCSI initiator to connect to a LeftHand volume check out these 2 videos at this website:
Managing Server Assignment on HP Lefthand Central Management Console (CMC)
and Binding Windows Volumes to iSCSI on HP Lefthand with MS iSCSI Initiator

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
tjieAuthor Commented:

" that when you want to snapshot your data (any VSS data like SQL database or Exchange Information Store) the SAN will politely ask the OS to quiesce the application to a consistent recovery state."

1) Would you elaborate the explanation more detail?
2) What is "VSS"?
3) What is the meaning of " quiesce the application to a consistent recovery state"
4) Your explanation is greatly appreciated
5) Thank you

SolarWinds® Network Configuration Manager (NCM)

SolarWinds® Network Configuration Manager brings structure and peace of mind to configuration management. Bulk config deployment, automatic backups, change detection, vulnerability assessments, and config change templates reduce the time needed for repetitive tasks.

Sure - VSS is a microsoft method of storing data in its filesystem.  It stands for volume shadow (copy) service:

Quiesce is like temporarily (invisible to applications and users) hitting the "pause" button, but doing it gracefully within the application, so you aren't in the middle of a "half done" operation.

Particularly for database applications like SQL or Exchange, if your SAN just blindly takes a snapshot at the "raw data level" without interacting with the OS, your snapshot could be missing a transaction that was in the process of being written to the database when the snapshot occurs.  This could potentially be a problem if you later mount that snapshot, and find that the database is captured in an inconsistent state.

In the past the SAN/iQ had to be run via a VSS command line request FROM inside the OS (like with a scheduled script.  Now with 8.5 you can manage the snapshots FROM the SAN management console, and it will interact with the OS to use the VSS service to "cleanly" snapshot your data.  this makes it much less complicated to setup automated snapshots, yet still gain the benefit of a more consistent snapshot.

Although it is still helpful VSS is less critical for file-level shares (like file/print share volumes).  There is significantly less danger of having corrupted snapshot data.  The biggest issue is typically databases files that are transactional in functionality like SQL/Exchange.

Good choice with your LeftHand SAN.  I'm sure you will find it to be an excellent storage solution!
tjieAuthor Commented:
teledata.con .....

1) Maybe, i will be posting other questions (related to this Left hands) in this Posting link; and will need your comments (if you don't mind)
2) Thank you very much

tjieAuthor Commented:

1) I need your help if you may .......
2) I open the "HP LeftHand Networks Centralized Management Console"
3) I created the test volume called "Volume 2"
4) The properties of this "Volume 2" as follows:
At the Basic Tab:
  * Volume name: Volume 2
  * Size: 10 GB
  * Server: Assign and Unassign servers .......
At the Advanced tab:
  * Cluster: BobaCluster_1
  * Data Protection Level: "Network RAID-10 (2-way mirror)"
  * Type: Primary
  * Provisioning: Thin
5) My question:
-I went to "Disk Management", but i can not see this "Volume 2" at all
-Any help? (I can see "other volumes" at the disk management)
6) Thank you

It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.