The cluster group SRVSQLCL1 already exists. To contine, specify a new sql server failover cluster group name

At the time of Cluster installation the given resource already used by Cluster. you will get below error

To resolve the issue.
1. Remove the given SQL Cluster name from Cluster Resource

Open the Failover Cluster Manager

Goto Roles or Services and Applications 

Right Click on the Resource Name and select Remove 

And then you can proceed with remaining Steps.

If you remove the cluster resource the associated cluster storage disk also goes offline as shown in below images.

Right click on cluster resource name and select remove option

it will remove the cluster resource and associated  disk from cluster and disks goes to offline also

then you need to add cluster disk by clicking Add Disk in right side pane

in add disk to cluster window select only cluster disk and click ok

this will add disk to cluster storage disks

Server Configuration options - SQL Server

SQL Server configuration option displayed and changed using SP_Configure system stored procedure. Using this system stored procedure you can view server setting or you can make configuration changes quickly using SSMS. Even you change the couple of configuration changes using GUI but not all.

Using below command you can see the basic configuration settings information 

sp_configure 

Some configuration options are designated as advanced options. By default, these options are not available for viewing and changing. To make them available, set the "ShowAdvancedOptions" configuration option to 1.

sp_configure 'advanced options', 1 

To see the advance option use below statements 

reconfigure 

exec sp_configure 

 
 


RECONFIGURE

After changing SQL Configuration value using system stored procedure sp_configure RECONFIGURE used to update the currently configured value for a changed configured value

Below are the list of configuration options 

name	minimum	maximum
access check cache bucket count	0	65536
access check cache quota	0	2147483647
Ad Hoc Distributed Queries	0	1
affinity I/O mask	-2147483648	2147483647
affinity mask	-2147483648	2147483647
affinity64 I/O mask	-2147483648	2147483647
affinity64 mask	-2147483648	2147483647
Agent XPs	0	1
allow updates	0	1
backup compression default	0	1
blocked process threshold (s)	0	86400
c2 audit mode	0	1
clr enabled	0	1
common criteria compliance enabled	0	1
contained database authentication	0	1
cost threshold for parallelism	0	32767
cross db ownership chaining	0	1
cursor threshold	-1	2147483647
Database Mail XPs	0	1
default full-text language	0	2147483647
default language	0	9999
default trace enabled	0	1
disallow results from triggers	0	1
EKM provider enabled	0	1
filestream access level	0	2
fill factor (%)	0	100
ft crawl bandwidth (max)	0	32767
ft crawl bandwidth (min)	0	32767
ft notify bandwidth (max)	0	32767
ft notify bandwidth (min)	0	32767
index create memory (KB)	704	2147483647
in-doubt xact resolution	0	2
lightweight pooling	0	1
locks	5000	2147483647
max degree of parallelism	0	32767
max full-text crawl range	0	256
max server memory (MB)	128	2147483647
max text repl size (B)	-1	2147483647
max worker threads	128	65535
media retention	0	365
min memory per query (KB)	512	2147483647
min server memory (MB)	0	2147483647
nested triggers	0	1
network packet size (B)	512	32767
Ole Automation Procedures	0	1
open objects	0	2147483647
optimize for ad hoc workloads	0	1
PH timeout (s)	1	3600
precompute rank	0	1
priority boost	0	1
query governor cost limit	0	2147483647
query wait (s)	-1	2147483647
recovery interval (min)	0	32767
remote access	0	1
remote admin connections	0	1
remote login timeout (s)	0	2147483647
remote proc trans	0	1
remote query timeout (s)	0	2147483647
Replication XPs	0	1
scan for startup procs	0	1
server trigger recursion	0	1
set working set size	0	1
show advanced options	0	1
SMO and DMO XPs	0	1
transform noise words	0	1
two digit year cutoff	1753	9999
user connections	0	32767
user options	0	32767
xp_cmdshell	0	1

Note : Be careful.. Changing settings affects your instance, the results could affect your instance, performance, availability, initially change the configuration settings development environment, after testing implement in production.