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Scons

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   Regarding the Scon  (ssh,8443)

  1. Unplug a single SC Controller's Management (eth0) port
  2. Plug that cable into the laptops ethernet port
  3. Configure the laptop to have the same IP address as the controller we took the cable from, including subnet mask, gateway, and DNS server 

 

 tested with my Laptop it is working (ssh and web) and also  access internet .

 

But still cannot  from our compellent .

 

From My Laptop tracert 76.164.8.174

 

15   267 ms   267 ms   268 ms 

 16   267 ms   256 ms   258 ms  209.63.66.4

17     *        *        *     Request timed out.

18   256 ms   256 ms   256 ms  76.164.8.174

 

Trace complete.

Thanks


Advice on Disk Configuration for SCV2020

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Hi there,

I had a couple queries I was hoping to get some help with.  We're implementing a new SAN and Server setup and as part of this are procuring an SCV2020 with 24 x 1.2TB 15K drives.

I've been reading through the various articles to plan our implementation but I can't really find anything with regards to the best practice around provisioning this storage pool.  We will be adding a 3 node failover cluster with Windows to access this SAN, there isn't any need to give machines a higher priority than others so I'm just wondering if I should create one Cluster Shared Volume across the entire storage array.   Would you recommend this or do you think I should go down the route of having numerous CSVs, indeed, is there even any benefit to this?

Finally; in reading through the Storage Management user manual I saw something saying 2000 series cannot access more than 20 disks at a time (and anything over that would be spare).  As we've been spec'd with 24 disks am I to assume 4 would be hot spares (overkill) or does the 2020 allow me to access more of them (ideally I just want 1 hot spare).

Any advice would be greatly appreciated.

Change default server for new volumes in Storage Manger 2016 R3

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We have a SC4020 running SCOS 7.x and when we first got it, it picked up the first server cluster as the default selection when creating volumes to make things easy. We have since retired that cluster and deleted it from Storage Manager and now we have to select the new cluster every time when we create a new volume and it's super annoying adding several unnecessary clicks. I've hunted through all the preferences and options I could find and couldn't turn up anything. Does anyone know if this is possible, even through some kind of registry or config file hack?  Here's the screen i'm talking about for reference

Newly-bought SC4020 cannot create Disk Folder

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 Hi,guys,I have bought a new SC4020(600G 15K SAS 2.5*6) with a extension chassis-SC280(4T 7.2K NLSAS*84) and I have finished all the works with the console cable,two controllers restarted successfully.Then I logined the GUI,change the default password,but I was jammed in the"create disk folder".I could see every disks in the unassigned folder,but if I clicked "continue",nothing happened.And I found the classification of each disk was "unknown",is that the reason of not creating disk folder by the sort of disks?How can I resolve the problem,Thanks.

Compellent default RAID Options | Disk quantity sizing

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Hi,

I have a question regarding the compellent default RAID levels (RAID 5-5, 5-9,6-6, 6-10), for example if I design SC4020 with 24 disks:

Q#1 If I configure dual redundancy with RAID level RAID 6-10, does it mean that there will be two sets of RAID 6 on each 10 disks? if yes then what happens to the remaining 4 disks?

Q#2 If I configure dual redundancy with RAID level RAID 6-6, does it mean that there will be 4 sets of RAID 6 on each 6 disks? if yes then total parity disks will be 2+2+2+2=8?

"...Server not visible on any path..." & "Local ISCSI Port xxxxxxx is down" thrown into my email box

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Hi,

I have the following error messages thrown into my email box, all within 10 minutes.

Can someone advice, please:

1-

Alert created on controller '229076' for object 'HOSTPRODVMS' [Connectivity]: Server 'HOSTPRODVMS' not visible on any path

2-

Alert created on controller '229077' for object '5000D310037ED410' [OperStatus]: Local ISCSI Port 5000D310037ED410 is Down

Alert created on controller '229077' for object '5000D310037ED411' [OperStatus]: Local ISCSI Port 5000D310037ED411 is Down

3-

Alert created on controller '229076' for object '5000D310037ED406' [OperStatus]: Local ISCSI Port 5000D310037ED406 is Down


Regards,

Connectivity alert "Server not visible on any path" thrown into my email box

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Hi,

Please advice on the alert below thrown into my email from my DELL Compellant SC2020 10GBE-2 Dual controlers:

Alert created on controller '229076' for object 'PRODASVR' [Connectivity]: Server 'PRODASVR' not visible on any path

Thanks!

"No new unmanaged disks were found." adding new disk

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Model: Compellent Enclosure EN-SC4020

I just popped this disk in the enclosure, to add disk space to a volume:

Fired up the Storage center, and under Enclosure1\Disks, it has a status of 'Up'

No othervalues are populated.

I then right clicked on 'Disks' and choose 'Manage Unassigned Disks', but received the message you see in the thread title: "No new unmanaged disks were found."

Tried a re-scan for disks, but no help.

Ideas?

I was really hoping for a nice easy plug & play to add storage...

oh, and the light on the HDD went green..

Thanks,

rich


Changing datapage size from 2MB to 512k

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Hi. I am considering, but not even leaning to yet, changing my datapage size from 2MB to 512k. The reason being is with my Unmap issues I am having, it is possible that the Unmap on VMFS6 will not work unless your array is at a 512k datapage size. That has not been confirmed yet. So please do not take this as truth yet. But I am going on the assumption that may be in issue, so I am starting to think what it will take, and the ramifications of using 512k.

So from the documentation:

By default, data is migrated between tiers and RAID levels in 2 MB blocks. Data can be moved in smaller or larger blocks to meet specific application requirements. These blocks are referred to as datapages.
• 2 MB: Default datapage size, this selection is appropriate for most applications.
• 512 KB: Appropriate for applications with high performance needs, or in environments in which Replays are taken frequently under heavy IO. Selecting this size increases overhead and reduces the maximum available space in the Storage Type.
NOTE: By default, the datapage size is 512 KB when SSDs are present. You can change the page size to 2 MB when you create a disk folder.
• 4 MB: Appropriate for systems that use a large amount of disk space with infrequent Replays.

We have several compellents, each of course with an SSD tier. A couple with optimized flash tier.

So what is strange is that the documentation says "By default, the datapage size is 512 KB when SSDs are present. You can change the page size to 2 MB when you create a disk folder" However our installers always set 2Mb storage type. Even with SSD.

We also take 15min replay, which expire every hour. So that seems to say a smaller block size would help.

Anyway I am trying to decide what are the pros/cons of changing this. And I realize it is probably a ton of work in terms of unassiging disks and creating new disk folder. etc..

So if any comments on this page size change please chime in. Thank you.

How to backup replicated snapshots at DR site using Netbackup?

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Hi Expert,

I have question pertaining backup replicated snapshots from Compellent SC8000. The case is where we have created replay to perform snapshot every hour. These replays replicated to Compellent SC8000 at DR site. Herewith, we would like to tape-out using Netbackup backup software. Kindly advice on how to achieve this? And, what is the restoration processes?

Thanks

Regards

YC

 

Drives not happy with SVc2020 unit

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I have received 4 disks for my SCv2020 unit an they dont seem to want to work i have all the screenshots that are telling me this following fault 

"System is unable to accept disk ** in enclosure position **** with serial number S4216Y3Z and dell part number CN033KFP7262263Q00Z0A01 becuase disk drive line unknown is not compatible with system"

FS8600 Mixed mode filesystem 'Permission Denied' on cp or mv from files outside the NFS mount

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Our system is FS8600, the export is a mixed mode filesystem, clients we're having issues from are linux, various flavors. I'm fairly new to the FS8600 line, but not Compellent itself.

We've tested this with various distributions, RHEL/CentOS6, Ubuntu16.04, etc all with the same result.  The shares are mounted NFSv3 currently.

TL;DR when we copy or move files from outside of the NFS share onto the share, we get 'permission denied' but an empty file gets created:

joellis@host:/www/test$ ls -al

d---rwxrwx 1 joellis 201 344 Jul 27 16:36 .

joellis@host:/www/test$ mv /tmp/testfile1.txt .

mv: cannot create regular file './testfile1.txt': Permission denied

joellis@host:/www/test$ ls -al

d---rwxrwx 1 joellis 201 344 Jul 27 16:36 .

----rwxrwx 1 joellis 201   0 Jul 27 16:36 testfile1.txt

 

Similar issue when we try to simply edit a file on the share.  'vi some_file' results in a 0 byte file but you can't save anything to it. 

 

Now, if you touch the file before trying to cp it, things work fine. mv still fails as does vim.

One thing that jumps out to me is the permissions on the directories.  You cant chmod and give u+rwx on anything, which suggests to me we might have some ACL or configuration on the NAS set wrong:

All file perms look like this

----rwxrwx

Directory perms look like this

 d---rwxrwx

 Can't change them:

$ chmod o-rw .
chmod: changing permissions of '.': Permission denied

$ chmod g-rw .
chmod: changing permissions of '.': Permission denied

Is there some inheritance setting on the Filer that prevents changing permissions on files down path?

Thanks in advance!

 

MPIO Failover Query with Server 2016 and Dell SCV2020

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I recently installed a Dell SCV2020 SAN using iSCSI at my workplace and as part of the troubleshooting tested the failover as per the installation guidelines.

I basically disabled a NIC whilst doing a transfer and the guide said the transfer shouldn't be interrupted however it did pause for a good minute or so.  I can't recall whether I gave up and reenabled the NIC and found it continued or if it eventually continued itself in hindsight but I'll be doing some more testing myself tomorrow.

In any case I was hoping to get some advice on MPIO and what exactly I should be expecting of it.  To give you an idea of the setup; I have 2 Dell N2024 Switches each representing their own Fault Domain and each Fault Domain has a connection to each of the controllers on the SCV2020 (it has a second controller for redundancy). And each server has 2 connections (one to each switch).

Each HBA shows as having effectively 4 connections (2 from each Switch) and MPIO is enabled in the OS (Windows Server 2016) and listed as Round Robin.  I've confirmed the fail of a controller continues uninterrupted and expected the same to happen when disconnecting the paths.  Just incase disabling the Nic Port in the OS caused a problem I did it via the switch too (I couldn't be there to physically unplug it as I was working remotely) and encountered the same behaviour.

In my investigations I've discovered a couple timers around keepalive and iSCSI command but, from what I can see, the Dell guidance is to keep these unchanged.

So I guess ultimately my question is, is this the expected behaviour or should it not pause the transfer of the file at all?

Any advice would be greatly appreciated.

Dell Storage PowerShell SDK Script to restart Secure Console on Dell|Compellent SAN

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Dell Storage PowerShell SDK was released with the new Dell Storage Manager, and has added multiple new commands. You can reference this post covering this software:

To restart Secure Console in Dell Storage PowerShell SDK:

Import-Module (Location of PowerShell SDK)"C:\API\DellStoragePowerShellSDK_v3_4_1_23\DellStorage.ApiCommandSet.psd1"
$user = <Enterprise Manager Admin User>
$em = <IP of DSM>
$pass = ConvertTo-SecureString <password for user> -AsPlainText -Force
$conn = Connect-DellApiConnection -HostName $em -User $user -password $pass

Restart-DellScSshSettings -Connection $conn -Instance <System number> -Confirm:$false

Compellent SC shutdown / startup

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Hi

I've a SC4020 storage with a SC220 expansion enclosure and I would like to confirm the correct shutdown and startup process.

Shutdown:

1st: Shutdown both SC4020 controllers from webinterface

2nd: Wait SC4020 shutdown

3rd: Shutdown SC220 using power switch on each PSU

Startup:

1st: Start SC220 using power switch on each PSU

2nd: Wait SC220 startup

3rd Start SC4020 using power switch on each PSU

Is it the correct process?


SCv2020 Performance Problem

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Hi All
I buy a Dell SCv2020 with 14x600GB,15K SAS Harddisk.
This is connected to two Dell PowerEdge R630 with VMware.

At the beginning i was very confused about the tier level function because i dont have any experience in such storage management.

All disk are in the same Disk Group (15K), RAID Controller has Read and Write Chance on.
Only Tier 1 can i active in SCv2020 and in Tier 1 i make a RAID 10.
I install one Windows Server 2016 and make a test with CristalDiskMark

Seq Q32 Read = 414MB/s with a 32GB File
Seq Q32 Write = 1145MB/s with a 32GB File

Are the performance normal and why so slow for Read Operation?
Theoretically i must have 14x Read and 7x Write Speed or?

Thank you for the help

Best regards

Neastea12345

Unassigned Disk - Unassigned Reason - Managed by another system?

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Hi,

We had a drive fail on our SCv2020, and a replacement was sent out to us.

We had out data centre staff swap the disks and I then went on to the Dell Storage Manager Client.

The replaced disk is showing in the Storage Tab as an Unassigned disk.

The Unassigned Reason is listed as Managed by another system.

If I right click the disk I get:

Show > Show In Storage Tab

Show > Show in Hardware Tab

Indicator On

Request Swap Clear

No option to manage or use the disk.

Any ideas?

SC 5020 SSD cache

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Hello team,

If you have 6 SSD RI drives in Tier 1, and you turn off Cache on controllers, can we say system has SSD cache in this operating mode?

Are there any manuals on this type of setup?

Compellent SC40 iscsi connectivity issue

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Hi,

Hope someone can provide a little help, we have a Compellent SC40 which is out of warranty actually, below is the issue:

We have server on it that are currently connected and volumes are mounted via iscsi. From the host end, all iscsi controller IP are pingable, able to telnet the port 3260. One server suddenly got disconnected and when I tried to do some iscsiadm command so it can connect to the compellent iscsi ip, its disconnected at compellent, though to note, it can still telnet the iscsi ip on port 3260. Tried checking the logs and there are no errors showing related to controllers. If i tried viewing the server at compellent web ui, it says, server port status is up but connectivity is disconnected.

Any similar issue here that may be able to provide some clue what is the problem?

SC4020 Initial Config

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I have a SC4020 that is in the process of being re-licensed, and am working to get everything in line for deployment. I got my hands on a deployment guide and have connected it to a machine using an onboard serial port, but I haven't been able to get anything out of the console port. Settings are 115200, 8,N,1. I'm having a coworker check the cable as I'm not onsite to do it myself, and should have an idea if the cable is bad on Monday.

I ended up gaining access to it via the MegaRAC, and got to an initial screen that says:

login: SCOS (R06.05.20.018) FAILED - Pre - Join information not complete; see "platform prejoin show".

This is expected as when it was removed from service, it was reset to defaults, so it needs to be completely re-initialized. The problem is I can't log into it - the deployment guide doesn't list any default passwords other than the one for the Web GUI, which I've tried with no success.

I did note that it seems you are supposed to put the controller into 'safe mode' by removing and reseating the battery, after which you can run the 'platform prejoin show' command. The problem is, as mentioned, for whatever reason, I'm getting zero output from the console port. I've tried two different machines and three different ports, all with the same result. If the cable tests bad, will a cable like this one or this one work, or is there something specific to the Compellent one? I tried getting a Dell P/N to order one, but was told it couldn't be found.

I did determine that both controllers were assigned 192.168.1.1, isolated controller 1 and set controller 2 BMC to be 192.168.1.2 so I can access both, so will this work the same as if I was using a serial port to set the config?

If the BMS console will not work and the cable tests out good, any ideas why I'm not getting any data out of the serial port?

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