LSI Megaraid add a disk in RAID 0 besides a configured RAID 10 array

We have an active RAID 10 with four disks. Now we want to add one disk in RAID 0 to the adapter.

This is the current configuration:

# megacli -LDInfo -Lall -Aall


Adapter 0 -- Virtual Drive Information:
Virtual Drive: 0 (Target Id: 0)
Name                :
RAID Level          : Primary-1, Secondary-0, RAID Level Qualifier-0
Size                : 5.457 TB
Sector Size         : 512
Mirror Data         : 5.457 TB
State               : Optimal
Strip Size          : 64 KB
Number Of Drives per span:2
Span Depth          : 2
Default Cache Policy: WriteBack, ReadAhead, Direct, Write Cache OK if Bad BBU
Current Cache Policy: WriteBack, ReadAhead, Direct, Write Cache OK if Bad BBU
Default Access Policy: Read/Write
Current Access Policy: Read/Write
Disk Cache Policy   : Disk's Default
Encryption Type     : None
Default Power Savings Policy: Controller Defined
Current Power Savings Policy: None
Can spin up in 1 minute: Yes
LD has drives that support T10 power conditions: No
LD's IO profile supports MAX power savings with cached writes: No
Bad Blocks Exist: No
Is VD Cached: Yes
Cache Cade Type : Read Only



Exit Code: 0x00

Now we added another drive which we want to configure as RAID 0. (Enlarge RAID 10 was not possible, so we decided to add just another disk, where we can save backups and stuff).

The new disk is in slot 4:

Enclosure Device ID: 32
Slot Number: 4
Media Error Count: 0
Other Error Count: 0
Firmware state: Unconfigured(good), Spun Up
Inquiry Data:            24M9K179FTOSHIBA MG03ACA300                          FL1D

Is it save for the other RAID 10 array to create a new RAID 0 array with the following command (Enclosure 32, Slot 4):

megacli -CfgLdAdd -r0 [32:4] WB RA Direct CachedBadBBU -a0

We definitely do not want to hurt the existing RAID 10 array and do not want to loose any data in this.

Thank you very much!