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180 Fabric OS Encryption Administrator’s Guide (DPM)
53-1002720-02
SRDF LUNs
3
1. Log in to the switch that hosts the LUN as Admin or FabricAdmin.
2. Enter the cryptocfg
--enable -LUN command followed by the CryptoTarget container name,
the LUN Number, and the initiator PWWN.
FabricAdmin:switch> cryptocfg --enable -LUN my_disk_tgt 0x0 \
10:00:00:00:c9:2b:c9:3a
Operation Succeeded
SRDF LUNs
The Symmetrix Remote Data Facility (SRDF) transmits data that is being written to a local
Symmetrix array to a remote symmetrix array. The replicated data facilitates a fast switch-over to
the remote site for data recovery.
SRDF supports the following methods of data replication:
• Synchronous Replication provides real-time mirroring of data between the source Symmetrix
and the target Symmetrix systems. Data is written simultaneously to the cache of both systems
in real time before the application I/O is completed, thus ensuring the highest possible data
availability.
• Semi-Synchronous Replication writes data to the source system, completes the I/O, and then
synchronizes the data with the target system. Since the I/O is completed prior to synchronizing
data with the target system, this method provides an added performance advantage. A second
write will not be accepted on a Symmetrix source device until its target device has been
synchronized.
• Adaptive Copy Replication transfers data from the source devices to the remote devices
without waiting for an acknowledgment. This is especially useful when transferring large
amounts of data during data center migrations, consolidations, and in data mobility
environments.
• Asynchronous Replication places host writes into chunks and then transfers an entire chunk to
the target system. When a complete chunk is received on the target system, the copy cycle is
committed. If the SRDF links are lost during data transfer, any partial chunk is discarded,
preserving consistency on the target system. This method provides a consistent point-in-time
remote image that is not far behind the source system and results in minimal data loss if there
is a disaster at the source site.
SRDF pairs
Remote replication is implemented by establishing a synchronized pair of SRDF devices connected
by FC or IP links. A local source device is paired with a remote target device while data replication is
occurring. While the SRDF devices are paired, the remote target device is not locally accessible for
read or write operations. When the data replication operation is completed, the pair may be split to
enable normal read/write access to both devices. The pair may be restored to restore the data on
the local source device.
Figure 92 shows the placement of Brocade Encryption Switches in an SRDF configuration. When
encryption is enabled for the R1 LUN, encrypted data written by the local application server to the
R1 LUN is replicated on the R2 LUN. The data is encrypted using a DEK that was generated on the
local encryption switch and stored on the local key vault. When each site has an independent key
- Fabric OS Encryption 1
- Document History 2
- Contents 3
- 53-1002720-02 10
- About This Document 13
- What’s new in this document 14
- Document conventions 14
- Command syntax conventions 15
- Notes, cautions, and warnings 15
- Additional information 16
- Getting technical help 17
- Document feedback 18
- Encryption Overview 19
- Terminology 20
- The Brocade Encryption Switch 22
- The FS8-18 blade 23
- FIPS mode 23
- Performance licensing 23
- Usage limitations 24
- FIGURE 2 Encryption overview 25
- FIGURE 3 Frame redirection 26
- IO Sync LAN 27
- FIGURE 5 DEK life cycle 28
- Master key management 29
- Support for virtual fabrics 29
- Encryption Center features 32
- Encryption user privileges 33
- Smart card usage 34
- Using system cards 39
- Deregistering system cards 41
- Using smart cards 41
- Tracking smart cards 42
- Editing smart cards 44
- Network connections 45
- Blade processor links 45
- (KAC) certificate 46
- Encryption preparation 53
- Creating an encryption group 53
- Creating HA clusters 70
- Failback option 72
- Invoking failback 72
- Adding an encryption target 73
- FIGURE 46 Next Steps screen 81
- Configuring storage arrays 89
- Remote replication LUNs 89
- SRDF pairs 90
- Moving targets 94
- Tape LUN statistics 97
- Encryption engine rebalancing 102
- Master keys 103
- Active master key 104
- Alternate master key 104
- Master key actions 104
- ATTENTION 106
- Creating a master key 111
- Security Settings 112
- Setting zeroization 113
- Redirection zones 115
- Disk device decommissioning 115
- Decommissioning disk LUNs 116
- Displaying Universal IDs 118
- Setting disk LUN Re-key All 119
- Thin provisioned LUNs 123
- Thin Provisioning support 124
- Time left for auto rekey 125
- General tab 131
- Members tab 133
- Members tab Remove button 134
- Security tab 135
- HA Clusters tab 137
- Tape Pools tab 139
- Adding tape pools 140
- Engine Operations tab 141
- TABLE 3 Encryption acronyms 142
- In this chapter 143
- Overview 144
- Command validation checks 144
- (Continued) 146
- Cryptocfg Help command output 148
- Management LAN configuration 148
- Configuring cluster links 149
- Node is a group leader node 150
- Node is a member node 150
- • FIPS crypto officer 151
- • FIPS user 151
- • Node CP certificate 151
- Submitting the CSR to a CA 154
- • cryptocfg --initEE 161
- • cryptocfg --regEE 161
- • cryptocfg --enableEE 161
- High availability clusters 166
- Creating an HA cluster 167
- Policy Configuration Examples 170
- Re-exporting a master key 171
- Viewing the master key IDs 172
- Zoning considerations 175
- Frame redirection zoning 176
- Gathering information 180
- Crypto LUN configuration 184
- Discovering a LUN 185
- Configuring a Crypto LUN 186
- Configuring a tape LUN 189
- Decommissioning LUNs 193
- SRDF LUNs 198
- --set -replication enable 199
- Adding replication LUNs 200
- Reading metadata after sync 200
- -newLUN option 201
- TF snapshot rekeying details 207
- -not_ready option of TF 208
- <initiator PWWN> 208
- ID> <initiator PWWN> 210
- Tape pool configuration 212
- CommVault Galaxy labeling 213
- NetBackup labeling 213
- Creating a tape pool 214
- Deleting a tape pool 215
- Modifying a tape pool 215
- First-time encryption 220
- Space reclamation 222
- Data rekeying 223
- Deployment Scenarios 227
- --rdcreate [host wwn] 236
- FIGURE 103 FCIP deployment 238
- Data mirroring deployment 239
- VMware ESX server deployments 241
- General guidelines 244
- HP-UX considerations 248
- Enabling a disabled LUN 249
- AIX Considerations 249
- Disk metadata 250
- Tape metadata 250
- Tape data compression 251
- Tape pools 251
- Tape block zero handling 252
- Tape key expiry 252
- Avoid double encryption 254
- PID failover 254
- Manual rekey 255
- Latency in rekey operations 255
- Key Vault Best Practices 259
- Tape Device LUN Mapping 259
- Deleting an encryption group 265
- Removing an HA cluster member 265
- Deleting an HA cluster member 269
- Failover/failback example 270
- Recovery 271
- -hbmisses and -hbtimeout 276
- Key vault diagnostics 282
- Command Activity 285
- Problem Resolution 285
- General errors and conditions 286
- LUN policy troubleshooting 293
- MPIO and internal LUN states 295
- Multi-node EG replacement 296
- Single-node EG replacement 298
- Multi-node EG Case 299
- Single-node EG Replacement 302
- Deregistering a DPM key vault 305
- TABLE 15 Compatibility Matrix 308
- State and Status Information 311
- Security processor KEK status 312
- Encrypted LUN states 312
- TABLE 22 Tape LUN states 315
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