Hp LeftHand P4000 SAN Solutions User Manual Page 25
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Table 8 Data availability and safety in RAID configurations (continued)
Data availability if an entire individual
storage system fails or if network
connection to a storage system is lost
Data safety and availability during
disk failure
Configuration
YesYes. 2 disks per RAID set can fail
without copying from another storage
system in the cluster.
Volumes configured with Network
RAID-10 or greater on clustered
storage systems , RAID 6
YesDepends on the underlying RAID
configuration of the storage system on
Volumes configured with Network
RAID-10 or greater on clustered VSAs
with Stripe which the StoreVirtual VSA is installed.
HP recommends configuring RAID 5
or RAID 6.
Mixing RAID configurations
You may mix storage systems with different configurations of RAID within a cluster. This allows you
to add new storage systems with different RAID levels. However, be certain to calculate the capacity
of additional storage systems configured with the desired RAID level, because the cluster operates
at the smallest usable per-storage system capacity.
For instance, your SAN uses four 12 TB HP P4500 G2s configured with RAID 1+0. You purchase
two additional 12 TB HP P4500 G2s which you want to configure with RAID 5.
In the existing cluster, a single 12 TB HP P4500 G2 configured with RAID 1+0 provides 6 TB of
usable storage. A single 12 TB HP P4500 G2 configured with RAID 5 provides 9 TB of usable
storage. However, due to the restrictions of how the cluster uses capacity, the 12 TB HP P4500
G2 configured with RAID 5 will be limited to 6 TB per storage system.
In general, the best practice is to avoid mixing configurations of various numbers or capacities of
drives, so that the SAN fully utilizes the available capacity of each cluster.
Setting RAID rebuild rate
Choose the rate at which the RAID configuration rebuilds if a disk is replaced.
NOTE: The RAID rebuild rate cannot be set on a StoreVirtual VSA, since there is no physical
hardware to rebuild.
General guidelines for setting the RAID rebuild rate
Use the following guidelines when deciding where to set the RAID rebuild rate:
• Setting the rate higher is preferred for rebuilding RAID quickly and protecting data. However,
it slows down user access to data.
• Setting the rate lower allows users quicker access to data during the rebuild, but slows the
rebuild rate.
To set the RAID rebuild rate:
1. In the navigation window, log in to a storage system and select the Storage category.
2. On the RAID Setup tab, click RAID Setup Tasks and select the RAID Rebuild Rate Priority choice.
3. Change the rebuild setting as desired on the RAID Rebuild Rate Priority window.
4. Click OK.
The setting is then ready when a RAID rebuild takes place.
Setting RAID rebuild rate 25
- Abstract 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- 1 Getting started 7
- Configuring storage systems 8
- Volumes wizard 8
- 1. Management group 9
- 2. Cluster 9
- 3. Volume 9
- Using the Map View 10
- Setting preferences 11
- Troubleshooting 12
- Storage system tasks 15
- Rebooting the storage system 17
- Checking boot device status 19
- Getting there 21
- Configuring and managing RAID 21
- RAID devices by RAID type 22
- Data protection 23
- Setting RAID rebuild rate 25
- Reconfiguring RAID 26
- Monitoring RAID status 27
- Managing disks 28
- SSD drives and wear life 30
- Verifying disk status 31
- Managing disks 33 33
- Managing disks 35 35
- Managing disks 37 37
- Managing disks 39 39
- Adding disks to RAID 40
- Replacing a disk 41
- Replace the disk 44
- RAID rebuilding 44
- 4 Managing the network 46
- Requirements 47
- TCP status tab 47
- Best practice 48
- Changing NIC frame size 49
- Changing NIC flow control 50
- The TCP/IP tab 51
- Using DHCP 52
- Best practices 53
- Supported bonds with 10 GbE 54
- IP address for NIC bonds 55
- Interface 57
- 1. Servers 61
- 3. Storage cluster 61
- Creating a NIC bond 63
- Creating the bond 64
- 1. Preferred interface 66
- 66 Managing the network 66
- Disabling a network interface 68
- Using a DNS server 69
- Setting up routing 70
- Deleting routing information 71
- Fibre Channel 73
- 5 Setting the date and time 74
- Editing NTP servers 75
- Deleting an NTP server 75
- Editing the date and time 76
- Editing the time zone only 76
- 6 Managing authentication 77
- Default administrative groups 78
- Editing administrative groups 79
- 82 Managing authentication 82
- 7 Monitoring the SAN 83
- 84 Monitoring the SAN 84
- Alarms and events overview 85
- 3. Filter panel 86
- 86 Monitoring the SAN 86
- Working with alarms 87
- Configuring events 88
- Working with events 89
- Viewing event details 90
- Configuring the email server 91
- Configuring SNMP 92
- Enabling SNMP agents 93
- Adding SNMP traps 94
- Editing trap recipients 95
- Removing trap recipients 95
- Sending a test trap 95
- Disabling SNMP traps 95
- Using the SNMP MIBs 96
- Running diagnostic reports 97
- Using log files 100
- Saving log files locally 101
- Editing remote log targets 101
- Exporting the System Summary 102
- Planning management groups 104
- Creating a management group 105
- Set DNS server 106
- Set up email for notification 106
- Set management group time 106
- Management group map view tab 107
- Configuration warnings 108
- Configuration errors 108
- Configuration guidance 109
- Disk level data protection 110
- Cluster-level data protection 110
- Starting additional managers 112
- Editing a management group 113
- Prerequisites 114
- Deleting a management group 116
- Managers overview 118
- Managers and quorum 119
- Failover Managers 120
- Virtual Managers 120
- Using the Failover Manager 121
- Using a virtual manager 126
- Adding a virtual manager 128
- 1. Virtual manager added 129
- Using a virtual manager 129 129
- Stopping a virtual manager 130
- Using a virtual manager 131 131
- 10 Working with clusters 132
- Creating a cluster 133
- Monitoring cluster usage 134
- Editing a cluster 134
- 136 Working with clusters 136
- Troubleshooting a cluster 137
- Repairing a storage system 138
- Deleting a cluster 140
- 11 Provisioning storage 141
- Thin provisioning 142
- Planning data protection 142
- 144 Provisioning storage 144
- Provisioning volumes 145 145
- 146 Provisioning storage 146
- Provisioning snapshots 147
- Ongoing capacity management 148
- Cluster use summary 149
- Volume use summary 150
- System Use summary 151
- 154 Provisioning storage 154
- 12 Using volumes 155
- Creating a volume 156
- Viewing the volume map 158
- Editing a volume 158
- Changing the volume size 159
- Migrating or moving a volume 160
- Deleting a volume 161
- 13 Using snapshots 162
- Planning snapshots 163
- Creating snapshots 164
- Editing a snapshot 165
- Scheduling snapshots 166
- Editing scheduled snapshots 168
- Scheduling snapshots 169 169
- Mounting a snapshot 170
- Mounting a snapshot 171 171
- 172 Using snapshots 172
- Delete the temporary space 173
- 174 Using snapshots 174
- Cancel the rollback operation 176
- Deleting a snapshot 177
- Troubleshooting snapshots 178
- 14 SmartClone volumes 180
- Planning SmartClone volumes 182
- Server access 183
- Naming SmartClone volumes 184
- 1. Source volume 186
- 2. Clone point 186
- 3. SmartClone volumes (5) 186
- 186 SmartClone volumes 186
- Clone point 187
- Shared snapshot 189
- Creating SmartClone volumes 190
- To create a SmartClone volume 190
- Viewing SmartClone volumes 192
- Using views 193
- 194 SmartClone volumes 194
- Editing SmartClone volumes 195
- Deleting SmartClone volumes 196
- 15 Working with scripting 198
- Required for VSS: 200
- Disk management 203
- Clustering server connections 205
- Creating a server cluster 206
- Editing a server cluster 207
- Deleting a server cluster 207
- Allows ThisType of Access 209
- 17 Monitoring performance 212
- Monitoring the SAN 213
- Monitoring volumes 214
- 216 Monitoring performance 216
- 2. Graph1. Toolbar 218
- 218 Monitoring performance 218
- Workloads 223
- Access type 223
- Access size 223
- Access pattern 223
- Queue depth 223
- Adding statistics 226
- Viewing statistic details 227
- Removing a statistic 227
- Changing the graph 228
- Exporting data 229
- 230 Monitoring performance 230
- Identifying licensing status 233
- Using license keys 234
- Entering license keys 237
- Purchasing an upgrade license 238
- Number of iSCSI sessions 241
- Authentication (CHAP) 242
- Example iSCSI configurations 243
- Using MPIO with Fibre Channel 246
- Troubleshooting Fibre Channel 246
- Deleting a NIC bond 249
- 21 Replacing hardware 251
- Repair the storage system 252
- Rebuilding data 253
- Reconfigure RAID 254
- Restarting a manager 254
- Rebuilding volume data 255
- Replacing the RAID controller 256
- Verifying component failure 257
- Removing the RAID controller 258
- 260 Replacing hardware 260
- Verifying proper operation 262
- 23 Third-party licenses 265
- Contacting HP 266
- Related information 266
- HP websites 267
- 25 Documentation feedback 268
- Glossary 269
- 270 Glossary 270
- 272 Glossary 272
- 274 Glossary 274
- 276 Index 276
- 278 Index 278
- 280 Index 280
- 282 Index 282
- 284 Index 284
- 286 Index 286
- 288 Index 288
- 290 Index 290
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