MSCS SAP Directories

As my understanding from installation guide , I am planning for ECC EHP4 ABAP PRD environment.
I have to decide disk directories for local and shared disks , Windows 2008 + oracle + failover HA MSCS.
Please advice if i am wrong here as i will start working accordingly with mentioned disk space.
LOCAL DISKS:
\oracle\SAPSID\102 ( oracle server software)   Disk Size 10 GB
\oracle\OFS ( Failover Software)   20 GB
SHARED DISK:
RAID5 :
SAP DATA FILES \oracle\SAPSID\DATA    900 GB
RAID1:
SAP GLOBAL DIR \usr\sap...                    75 GB
Online Redo Log files, set A                    50 GB
Online Redo Log files Set B                     50 GB
Mirrored online redo Log files Set A        50 GB
Mirrored online redo Log files Set B         50 GB
Backup of online redo logfile                   50 GB
Please advice as i have give documentation tomorrow to the client.
Regards

Hi,
Your sizing looks okay except for Redo logs. You dont need 50GB for redo logs. You can allocate 2 GB for each set of logs.
Regards,
SBK

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