rst-2cv's questions

I've got two RHEL 6 servers, one is an NFS server (we'll call it nfs-server, say its IP is 10.1.1.1), and the other is a generic client for all intents and purposes (we'll call it nfs-client, say its IP is 10.0.0.1).

Both nfs-server and nfs-client are connected to the same centralised authentication system, so UIDs/GIDs are the same for a given user.

nfs-client is mounting an NFSv3 share from nfs-server:/shared_folder/cache to /shared_folder/cache.

The /shared_folder directory on nfs-server is in mode 755, owned by root:root, and the /shared_folder/cache directory is in mode 2775, owned by cache:cache (UID=20014, GID=20004).

I have a set of users who are all members of the cache group in LDAP, but they cannot create or delete anything in the /shared_folder/cache directory itself on nfs-client. However:

• If a file already exists in /shared_folder/cache that has the correct permissions (writable by group cache), the users can modify the file, but not delete it (e.g. if /shared_folder/cache/testfile exists, and is writable by the cache group, the users can modify the contents of the file, but they cannot delete it)
• If a subdirectory already exists in /shared_folder/cache that has the correct permissions (mode 2775, owned by cache:cache), the users can modify the directory as normal (e.g. if /shared_folder/cache/testdir/ exists in mode 2775 and owned by the cache group, the users can add/modify/delete files and directories in testdir, but cannot delete testdir itself)
• If I log in as one of the users on nfs-server, all of a sudden I am able to create/modify/delete files and directories as normal within /shared_folder/cache

How can I fix this NFS mount? Diagnostic info is below the horizontal rule.

The output of id user1 on both nfs-server and nfs-client shows:

uid=8173(<username>) gid=8173(<username>) groups=20004(cache)

nfs-server has the following export configured in /etc/exports:

"/shared_folder/cache"        <nfs-client-IP>(rw)

The output of exportfs -v on nfs-server shows:

/shared_folder/cache
                   <nfs-client-IP>(rw,wdelay,root_squash,no_subtree_check,sec=sys,rw,root_squash,no_all_squash)

I have a DL380 G9 with 12x8TB 3.5" disks:

| 1 | 4 | 7 | 10 |
| 2 | 5 | 8 | 11 |
| 3 | 6 | 9 | 12 |

In the Smart Array Controller GUI, if I select all 12 disks and assign them to a RAID 50 array, how will the controller divide the disks for the RAID 5 arrays?

Will drives 1-6 and 7-12 inclusive be in two separate RAID 5 arrays, striped for RAID 0? Or will drives 1-3, 4-6, 7-9, and 10-12 be in four separate RAID 5 arrays striped for RAID 0?

If it's the former by default, is it possible to manually configure the array to the latter?

I have a CentOS 8 virtual machine (192.168.10.203) running nfs-server, and I'm trying to mount the share on my Windows 10 Pro x86_64 machine (192.168.10.10) I have installed the "Services for NFS" Windows feature), but when I run mount \\<nfs_server_IP>\data N:, I keep getting this error:

Network Error - 53

Type 'NET HELPMSG 53' for more information.

The message for Network Error 53 is "The network path was not found" but I'm not sure what that means.

This is what my /etc/exports looks like on the CentOS machine:

/data 192.168.10.0/24(rw,sync,root_squash,insecure,anonuid=0,anongid=0)

I've also tried with the bare-minimum options:

/data 192.168.10.0/24(rw,sync)

Both the CentOS and Windows 10 machines can ping each other.

I can connect to the NFS server on port 2049

Output of rpcinfo -p localhost run on the NFS machine:

$ rpcinfo -p localhost
       program vers proto   port  service
        100000    4   tcp    111  portmapper
        100000    3   tcp    111  portmapper
        100000    2   tcp    111  portmapper
        100000    4   udp    111  portmapper
        100000    3   udp    111  portmapper
        100000    2   udp    111  portmapper
        100024    1   udp  39181  status
        100024    1   tcp  38357  status
        100005    1   udp  20048  mountd
        100005    1   tcp  20048  mountd  
        100005    2   udp  20048  mountd
        100005    2   tcp  20048  mountd
        100005    3   udp  20048  mountd
        100005    3   tcp  20048  mountd
        100003    3   tcp   2049  nfs
        100003    4   tcp   2049  nfs
        100227    3   tcp   2049  nfs_acl
        100021    1   udp  53482  nlockmgr
        100021    3   udp  53482  nlockmgr
        100021    4   udp  53482  nlockmgr
        100021    1   tcp  39197  nlockmgr
        100021    3   tcp  39197  nlockmgr
        100021    4   tcp  39197  nlockmgr

I have the insecure option in my /etc/exports per "Network Error - 53" while trying to mount NFS share in Windows Server 2008 client. Didn't work.

I've tried disabling the firewalls on both hosts with no results (systemctl disable firewalld && iptables --flush on the CentOS machine, and disabling both Windows Defender Firewalls (public and private network firewalls).

Any ideas?