Wednesday, June 29, 2011

Interesting post, mainly people raving about equallogic

I have 4x PS5000's (older model with 6x 1Gb Ethernet)
There fantastic, very easy to manage and perform well. Provisioning, growing and migrating LUNs to other nodes can all be done on the fly, makes life easy.
we got an Equallogic 5000X love it. nearly purchased new 10GbE one but need to wait a little longer to some $$$
highly recommneded. Feature packed and fully intergatable with other Equallogic models.

Tuesday, June 28, 2011

Equallogic chosen by First DataBank in the UK

“EqualLogic systems are simple to deploy, manage, and grow,” explained Ian Jones

LeftHand and storage manager, how to get it to work together

Hi There, We recently purchased Storage Manger specifically to monitor our HP 4000 LeftHand devices, but have since found out that the devices do not populate the required tables to storage manager for us to view the storage overview within the main console on storage manager.

Friday, June 17, 2011

A case for VSA, lefthand or maybe someone elses?

Of course, using vMotion requires shared storage, and there we hit a snag. My first choice, EqualLogic arrays, are just too expensive for this environment. Even a low-end disk array like an HP MSA or Dell MD3200 would cost more than $10,000 with six 300-GByte SAS drives, and that’s for a single controller model. Going to a dual controller system, which of course the enterprise storage guy inside me says is required, would add another $3,500 or so.
But if I installed a VSA with synchronous mirroring, like HP’s P4000 (Lefthand), StoreMagic, Falconstor NSS or Starwind HA, in each server, I could leverage the built-in RAID controllers, eliminate the storage controller as a single point of failure and theoretically improve reliability by storing two copies of all the data.
On the down side, I’ll give up some performance and host resources to the replication, but Dr. George’s I/O requirements are pretty light, and we have CPU to burn in the new config. Now I just have to choose a solution.

Thursday, June 16, 2011

EqualLogic simplicity

Today is an excellent example of the Equallogic platform handling an event failure, dispatching notifications and self-healing.

Wednesday, June 15, 2011

LeftHand, how to write to a snapshot

I'm a relative newbie to working with the P4000s so I am cutting my teeth with the VSA appliance.

I am testing how snaphots work, and I have successfully taken and connected to the snapshot by adding in the new ISCSI name of the snapshotted volume in the windows iscsi initiator. I have assigned the server read/write access as well, and the disk is available in computer management etc. All good, however when i try to write a file to the snapshotted disk, I get an access denied error. I've done a google, and some folk say snapshots are read only, but I am confused by the fact that I can assign a server read/write to access to the snapshot, this implies that I should be able to write to it!

Have I done something wrong or is this the way it works. And if so, is there a sneaky way I can get write access to the snapshot?

LH a question on how to setup

So my question is ... how can I make my P4000 available on the normal network for monitoring and management purposes while storage traffic remains on the separate storage network ?

I've tried using the built-in 1GBit NIC's in the Storage nodes, connecting them to the normal network, but then I start loosing connectivity to the storage cluster as it doesn't seem to like working on two different sub-nets.

Has anyone got experience with this kind of scenario ?

Any help is really appreciated.

Friday, June 3, 2011

An White paper commisioned by HP for the P4000 (left hand) SAN

Value of Adding Nodes Online via Storage Clustering
Eighty percent of the users interviewed were actively using this ability with extremely good—and impressive—results that garnered much positive commentary:
 “Prior to the P4000, this took 3-4 days of effort, now it’s just 2 minutes (this happens 4-5 times per year).”
 “We had 2 FTEs before—so this alone saves us one of those and contributes probably $100,000 in cost savings in terms of the uptime; not to mention the 60 or so hours of administration time saved. Our prior approach took at least a month to upgrade, plus overtime, plus downtime … and we were managing a far smaller capacity than now.”
 A slightly more conservative user employs the feature, but “only after-hours, to be ultra safe;” it used to take 4 hours before the P4000 and now takes “minutes.”
 Although only done twice in four years, the approach without the P4000 capability took three weekends of 1 FTE to migrate 5 TB (11 volumes) “and of course, that was just moving the data; the device would be down.” Now it “can be migrated in minutes with a simple point and click—it’s never offline and there’s no overtime.”
White Paper: Business and Operational Benefits Achieved with HP P4000 SANs 9
© 2010, Enterprise Strategy Group, Inc. All Rights Reserved.
 “Before it took at least a day and now it’s minutes.”
 One user spoke of the social convenience (staff “not having to pull all-nighters”) and “extreme confidence” with the online upgrades; saving the overtime was nice, but the improved reliability for customers was excellent. The user also pointed out that the online upgrade saved not just the time of the upgrade itself, but also the three or four days of planning it used to need beforehand.

Value of Thin Provisioning
The use of thin provisioning fell into two distinct camps:
1) Those few users that either barely or did not use thin provisioning at all.
a. One user said it was “not comfortable” and “feels that it’s even less management effort to not try to use it.”
2) The majority, however, do use thin provisioning extensively; on average for around 80% of their volumes. Some examples of individual experiences are:
a. Saving 25% capacity (lower than might be expected because they used to manually over-provision in any case).
b. Saves or reclaims about 40% of capacity; while readers will need to figure their own dollar value, for this user it equated to $50-60,000 per annum.
c. Two users estimated saving a week’s worth of FTE time per year.
d. Saving 50% capacity through reclamation and deferring purchases, said one user, while another estimated 30-40% savings.
e. “Really easy and really quick” was the succinct summary from one customer.

Thursday, June 2, 2011

An interesting possible development for LH vars

Scale Computing is questioning HP’s commitment to smaller VARs, since it believes the new changes could cause unnecessary problems or hurdles.