Menu

dell

flower

Create new LUN on Unity

, , , , , 0

Create new LUN on Unity by Dell-EMC

 

Login to GUI

 

Go to navigation menu on left Storage > Block

 

 

Click the “+” sign to create

-name it with hostname, date and purpose for easy identification

-provide description to identify

-put tiering policy: “Start High Then Auto-Tier” default is recommended

-uncheck the thin provisioning option

-size as requested

-thin option (checked means increase in disk usage as data is written, uncheck means immediate increase) 

-no limit on I/O

 

Provide access to hosts 

-set up the hosts connection by clicking “+” sign

 

Setup snapshot schedule as needed

 

Setup replication as needed

 

data

Tips & Tricks for Data Domain

, , , , , , , 0

Tips & Tricks for Data Domain by Dell-EMC

 

You can utilize by GUI on web, or ssh into the data domain

 

Here’s example of data domain commands

To shows current alerts

alerts show current

 

To unfail the new replaced disk after replacing faulty disk (does not come back online automatically)

disk unfail disk_position (ex: 1.1)

 

Show the state for disks

disk show state

 

Shows the properties of disk hardware

disk show hardware

 

Clean up filesystem

filesys clean start

 

Check filesystem status

filesys status

 

tricks

Tips & Tricks on VNX

, , , , 0

Tips & Tricks on VNX storage by Dell-EMC

 

default ID and PW

ID: nasadmin

PW: nasadmin

 

ID: root

PW: nasadmin

 

To check domain list

/nas/sbin/navicli -h spa domain -list

 

To check failover/failback status

/nasmcd/sbin/getreason

 

To utilize navisseccli

/nas/sbin/naviseccli -h SPA -user sysadmin -password <password> -scope 0 domain -messner -add -system <CS_IP>

 

To generate CA certificate for GUI

/nas/sbin/nas_ca_certificate -generate

 

To extend NFS on VNX

Storage > Storage > Storage Configuration > File Systems

click on appropriate file system

click “Extend” and provide the extend size

click “OK” or “Apply”

control

Cleaning the Control Station on VNX

, , , , , 0

Cleaning the Control Station on VNX

 

ssh into control station (IP noted on storage manual)

 

Check to see if there’s any stale tasks

cd /nas/tasks (only primary control station has this filesystem)

ls | wc -l

 

*should be normal to see single to double digits… 

 

Remove any stale tasks

rm -rf *_status

rm -rf *_pipe

 

check back the stale task status by another command of

ls | wc -l

 

to see the failover/failback status

/nasmcd/sbin/getreason

10 – slot_0 primary control station (slot_0 should be always primary, if else, login to slot_1 primary and reboot)

 0 – slot_1 reset

 5 – slot_2 contacted

 5 – slot_3 contacted

 

bring back to the primary node (as recommended)

login to slot_1 primary by command

su – nasadmin

reboot

 

Do not reboot from both primary and secondary control station at once! it will cause serious damage!

 

*wait for full boot up on each side and check status by getreason commands

 

datacenter

Write cache on Unity Storage

, , , , , , 0

How to disable or enable write cache on Unity

 

SSH into Primary SP

-use OS account “service” with password the same as admin account

-use commands like below to enable or disable

 

*you only need to run it once and it’ll be applied to both nodes!

 

svc_cache –get

shows status

3 means enabled

7 means transitioning

8 means disabled

 

svc_cache –force-enableCacheOperations

force enable cache

 

Here’s the procedure for maintenance

1) disable write cache option (only need to do once on SP A or B)

2) put Unity SP A or B on service mode

3) on-site engineer will replace parts

4) put Unity SP A or B out of service mode

5) enable write cache option

 

report

Get status report on PowerEdge via omreport

, , , , , , , , , 0

Here’s nifty tools you can use on PowerEdge server machines

 

Behold the Dell OpenManage Server Administrator

 

omreport command allows you to see detailed information about your system components. You can retrieve summaries for many system components at one time, or you can get details about a specific component. This chapter shows you how to get reports with the level of detail that you want…!

 

you can use below command to see the lsit of valid sub-commands 

omreport -?

 

you can then use below command again to see the possible menu on sub-commands

omreport system -?

omreport storage -?

 

Here’s how you get report on physical disk status on storage of PowerEdge

omreport storage pdisk

 

To check if the new disk building on RAID is completed

omreport storage pdisk controller=0
OR
/opt/MegaRAID/perccli/perccli64 /c0 show
 
 
 

here’s the breakdown of commands, thanks to University of Waterloo

 

 

*you may need to install on OS for commands to be available