Cannot Connect to Storage Using iSCSI on RHEL/Rocky/AlmaLinux

KB0023062

Pure Product

FlashArray

Environment

iSCSI on RHEL/Rocky/AlmaLinux

Symptoms

No devices appear after connection attempt
iscsiadm -m session shows no connections
Multipath shows no devices

Cause

Network misconfiguration
Firewall blocking
FlashArray not configured

Resolution

Diagnostics Steps:

# Check network connectivity
ping <storage_portal_ip>

# Check if storage port is reachable
nc -zv <storage_portal_ip> 3260  # iSCSI

# Check if iSCSI target is discovered
iscsiadm -m discovery -t sendtargets -p <storage_portal_ip>

Network misconfiguration:
- Verify IP addresses and subnet masks
- Check VLAN tagging
- Verify switch port configuration (speed, duplex)
Firewall blocking:
- Allow required ports: iSCSI (3260)
- Check both host and storage array firewalls
- Recommended: For dedicated storage networks, use trusted zone to disable filtering on storage interfaces
FlashArray not configured correctly:
- Verify target portal is configured
- Check that host IQN is registered
- Ensure volume is mapped to host