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Removing disks/tiers

November 30, 2016, 11:40 pm
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Hi, please excuse my extremely limited knowledge of Compellents!

We've a number of 2 tier systems, 15K and 7.2K disks in each tier. We've abandonded our support contract with Dell as we're moving to cloud and SANs will be decomissioned. In the meantime we've recently suffered a high number of 15K disk failures, and rather than source replacements I'm looking to remove working disks from some under-used SANs.

As it happens we have a couple of mirror SANs where we could potentially remove all 15K disks and still have plenty of capacity with the 7K disks (it's not clear to me why they have a fast tier at all, given that their bottleneck is a WAN).


The problem is that I have no idea how to remove an entire tier without potentially damaging the data that needs to remain on the SAN. Google-fu is failing me. Is this even possible? As mentioned above, my knowledge of these systems is extremely limited =:-(

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What is a CA?

December 2, 2016, 11:41 am
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Hey guys. had an issue with our Compellant last week. Dell tech support pointed to stuck CAs causing excessive I/Os. What is a CA? What causes a CA?

Thanks,

vMojorod

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Compellenet SC4020 and SC2020 Drives

December 6, 2016, 6:50 am
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Good afternoon,

We have had an issue recently when using 3 known working drives from a Compellent SC2020 in a Compellent SC4020. The drive Part numbers are RWV5D which is a Dell Enterprise Plus 1.2TB SAS 12Gbps 10K drive. The fault we are presented with is below. Please can anyone advise what might be causing this issue? Thank you!

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CITV problems configuring VASA provider

December 6, 2016, 12:49 pm
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I'm trying to set up the VASA provider on the CITV appliance (i've tried 3.0 and 3.1), and after setting the VASA provider password it immediately reports back "Could not obtain server certificate". I don't know where to go from here because that error provides nothing to go on. Is it my vSphere certificate? The Dell Storage Manager certificate? Something else entirely?

The documentation is frustratingly vague, where it says I need the IP of the Entrprise Manager Data Collector but the user/pass for Enteprise Manager and specifies that I need to enter a VASA provider user but not where that user is supposed to be (vCenter? Enterprise Manager? The *** CITV appliance?) or if it is supposed to create it on its own, which maybe? Why else would I need to verify my password there but not in the beginning when I enter my vSphere credentials?

To be on the safe side, i've created users in both the Enterprise Manager, the Enterprise Manager Data Collector, and vSphere but that doesn't seem to help. No firewalls are on either and the appliance is on the same network as the rest of the system. I also have no problems setting up the RMSV and that prompts me to accept certificates and works fine.

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DSM data collector VM

December 7, 2016, 10:49 am
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I have successfully deployed the DSM virtual machine data collector in vcenter.  How are you able to get to a root prompt.  All I get is a menu of four choices.

Thank you.

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Dell Storage Manager Data Collector - Registered Certificate

December 7, 2016, 10:56 am
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I have successfully deployed Dell Storage Manager Data Collector.  I am attempting to register our SSL certificate.  I have created the public key and pkcs#12 with an alias.  I keep getting the error certificate exception.  I would like clarity on what exactly the requirements are for the pub key and pkcs#12 files.  I use openssl to create the files.

Thank you.

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Clearing Virtual Disk Bad Block has any impact on my existing data ?

December 27, 2016, 10:13 am
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Hi,

We have a Server running with 4 HDD configured with RAID 5 with no Hot Spare. 2 HDD and Virtual Disk were showing error (not failed), So we replaced with new HDD then HDD error were removed and running well. But The Virtual Disk showing the error still.

How can we remove this error ? Here has a option to 'Clear Virtual Disk Bad Block', If we run this option, will it has any data loss issue, the server running with several VM with critical and important data.

Suggestion needs from you experience guys. Appreciate your help.

Thank you.

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Powershell Enterprise Manager-Connect Could not create SSL/TLS secure channel

August 30, 2016, 2:45 am
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Hi all,

I'm writing a Powershell-Script to manage a Compellent environment.

I have an error, which is new for me: I can't connect to EM because SSL/TLS-connection is not possible.

I did some "Google"-search and found, that Microsoft is changing some things in SSL/TLS.
The related MS-Patch is installed and the related Registry-Keys are set.

I have a Windows 2012 Server (without R2) running Enterprise Manager and I'm working with the
newest Compellent Command-Set DellStoragePowerShellSDK_v2_2_1_362A.

Does anybody know, how to deal with that?

Thanks for any help

Regards

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When does Pressure down actually move

December 29, 2016, 7:41 am
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When I see downward pressure on my pressure report in Storage Manager, when will that data actually move?  At the next snapshot? When the next snapshot expires? or 12 days from when the down pressure is reported?

Thanks for any insight,

Bill

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Anyone tried vSphere 6.5 VMFS6 auto unmap?

January 6, 2017, 5:58 am
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The VMware HCL says the new auto unmap requires SCOS 7.1 (which is key customer still).  I have tried it on a SCOS 6.7.11 and the auto unmap doesnt appear to be reclaiming. Its strange why SCOS 7.1 would be required, maybe the VAAI primitive has changed a bit?

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how to change local port operational mode from virtual port mode to legacy mode or legacy mode to virtual port

January 10, 2017, 1:50 am
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Can you please provide me the procedure how to change local port operational mode from virtual port mode to legacy mode or legacy mode to virtual port mode in Dell compellent SC-4020 ?

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Is it possible to change storage FC port (Compellent SC4020) Virtual mood to legacy mood ??

January 11, 2017, 2:46 am
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Hi,

The Storage (SC4020) has been configured already. Now is it possible to change the configured Virtual mood ports to Legacy mood ports ? Is there any way or will we need to reset the  the storage ?

Appreciate your support.

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FYI, SCOS 7.x VMware PSP changes

January 13, 2017, 9:32 am
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It appears reading through the VMware HCL, that SCOS 7.1x wants MRU instead of round robin (RR) path selection. 

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Dell SCV2020 disk only one path to device

January 15, 2017, 11:08 pm
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Hello,


On a recently installed Dell SCV2020 with SAS direct attached on 3 R630 servers, I have all disks with a warning message (View Image)


I don't understand this error and how to resolve this issue.


Please help !

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SCV2020 Round Robin

January 15, 2017, 11:13 pm
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Hello,


On a recently installed Dell SCV2020 (last firmware) with 3 nodes in SAS direct attached mode, each LUN in VMWARE ESXi 6.0U2 with Round Robin path selection, I have ACTIVE/STAND BY paths....


In each R630 Servers I have 1 HBA 2ports DELL 12GB SAS


Does SCV2020 support ACTIVE/ACTIVE in this configuration ?


Thanks for your help

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Compellent Series 040 controller EOL

January 17, 2017, 12:29 pm
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Hello,

I just had a question on when the end of life (EOL) is on the Compellent series 40 controller?  Trying to plan for future initiatives.

Thank you!

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SC4020 Getting "Prefetch Page Failure, Failing all outstanding requests"

January 23, 2017, 10:42 am
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I'm receiving the error "Prefetch Page Failure, Failing all outstanding requests" about 30 times times a second for 3 seconds at an interval of about 10-20 minutes, it occurs on both controllers but at different times. Both controllers are running version 6.7.22

Does anyone know what could cause this and how to stop it from happening?

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Configure-EM-SMIS.ps1 script not found

January 24, 2017, 4:35 am
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Hi,

I'm trying to set up a SMI-S user for a new Compellent Storage system for monitoring purposes. I followed the instructions in the Admin Guide, but the Configure-EM-SMIS.ps1 script is not present. Where can I download this script?

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port counters

January 24, 2017, 6:22 am
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Hi ,
Please advise on below  counters , the port is connected to iscsi 

FCS Errors: ................................... 2
Single Collision Frames: ...................... 0
Late Collisions: .............................. 0
Excessive Collisions: ......................... 0
Multiple Collisions: .......................... 0
Oversize Packets: ............................. 1
Internal MAC Rx Errors: ....................... 2
Received Pause Frames: ........................ 0
Transmitted Pause Frames: ..................... 95

Thanks

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My 1st Storage Device, SCv2020.

January 24, 2017, 8:58 am
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I've been given the go ahead to replace two aging HP servers with 2x Dell SCv2020's and 2x R630's.  The HP's currently host HyperV VM's stored on local storage, my plan is to use the SCv2020's to store the VM's and make them available to the R630's so I can live migrate between hosts.

Having not used this type of device before I was thinking that I would use a group of SSD's for HyperV and then the slower 10K HDD's for general file sharing.  Which it still looks like I can do, but I'm not sure this would make best use of it.

Having setup one of the SCv's for testing the default setup has grouped all the storage in to one large junk (7xSSD, 7x10K's) where I was expecting to have to specify what I wanted.  So my question is could I create a 1.5TB volume for HyperV and another 5TB volume for general file storage and leave the SCv to decide which disks are better suited to which task based on access?  Or something along these lines.

Thanks in advance.

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