Updating Storage Mount Points from Cholla to Horizon in Rocky Linux 8

This guide covers updating your /etc/fstab file to point to the new Horizon storage infrastructure instead of the legacy Cholla system.

Prerequisites

Root or sudo access
Existing Cholla mounts in /etc/fstab
Access to the new Horizon storage system

Steps

1. Unmount Existing Cholla Mounts

Unmount all active Cholla storage mounts:

sudo umount /mnt/YOURSHARE

2. Edit fstab

Open the fstab file with your preferred editor:

sudo vi /etc/fstab
```

### 3. Update Mount Entries
Replace old Cholla references with new Horizon endpoints:

**Before:**
```
cholla.rc.asu.edu:/export/path  /mount/point  nfs  defaults  0 0
```
or
```
10.107.27.x:/export/path  /mount/point  nfs  defaults  0 0
```

**After:**
```
horizon.rc.asu.edu:/export/path  /mount/point  nfs  defaults  0 0

4. Mount New Storage

Mount the updated filesystems:

sudo mount -a

5. Verify Mounts

Confirm your mounts are active:

df -h | grep horizon
mount | grep horizon

Example

Complete example of updating an entry:

# Old entry
cholla.rc.asu.edu:/data/YOURSHARE  /mnt/YOURSHARE  nfs  defaults  0 0

# New entry
horizon.rc.asu.edu:/data/YOURSHARE  /mnt/YOURSHARE   nfs  defaults 0 0

Troubleshooting

DNS Resolution Issues

If horizon.rc.asu.edu cannot be resolved, update your DNS servers to ASU's DNS:

# Check current DNS
cat /etc/resolv.conf

# Update DNS via NetworkManager
sudo nmcli connection modify "connection-name" ipv4.dns "129.219.17.5 129.219.17.200"
sudo nmcli connection down "connection-name" && sudo nmcli connection up "connection-name"

# Verify DNS works
ping -c 3 horizon.rc.asu.edu

Other Issues

Verify NFS client: sudo systemctl status nfs-client.target
Check logs: sudo journalctl -xe | grep mount
Contact ASU Research Computing support for assistance

Notes

ASU's DNS servers (129.219.17.5 and 129.219.17.200) are required to resolve RC infrastructure hostnames

Migrate to Horzion from Cholla or Oasis