APC RAID Subsystem SCSI-SATA II Instrukcja Użytkownika Strona 17
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SAS / SATA II NAS System
User’s Manual
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Definition of RAID Levels
RAID 0 is typically defined as a group of striped disk drives without parity or data
redundancy. RAID 0 arrays can be configured with large stripes for multi-user
environments or small stripes for single-user systems that access long sequential records.
RAID 0 arrays deliver the best data storage efficiency and performance of any array type.
The disadvantage is that if one drive in a RAID 0 array fails, the entire array fails.
RAID 1, also known as disk mirroring, is simply a pair of disk drives that store duplicate
data but appear to the computer as a single drive. Although striping is not used within a
single mirrored drive pair, multiple RAID 1 arrays can be striped together to create a
single large array consisting of pairs of mirrored drives. All writes must go to both drives
of a mirrored pair so that the information on the drives is kept identical. However, each
individual drive can perform simultaneous, independent read operations. Mirroring thus
doubles the read performance of a single non-mirrored drive and while the write
performance is unchanged. RAID 1 delivers the best performance of any redundant array
type. In addition, there is less performance degradation during drive failure than in RAID
5 arrays.
- SAS/SATA II NAS System 1
- Table of Contents 2
- Preface 7
- FCC Compliance Statement 8
- Before You Begin 9
- SAS / SATA II NAS System 10
- User’s Manual 10
- Chapter 1 Introduction 11
- 1.1 Key Features 12
- 1.3 RAID Concepts 16
- RAID Management 20
- 1.4 Array Definition 21
- 1.5 High Availability 22
- 3.2 Powering On 28
- 3.3 Installing Hard Drives 30
- Main Menu 37
- Chapter 5 RAID Management 47
- 5.2 RAID Set Functions 49
- 5.2.2 Delete RAID Set 50
- 5.2.4 Offline RAID Set 54
- 5.2.6 Create Hot Spare 57
- 5.2.7 Delete Hot Spare 57
- 5.2.8 Rescue Raid Set 58
- 5.3 Volume Set Function 59
- 5.3.2 Create Raid 30/50/60 62
- 5.3.3 Delete Volume Set 63
- 5.3.4 Modify Volume Set 64
- 5.3.5 Check Volume Set 67
- 5.3.7 Stop Volume Check 70
- 5.4 Physical Drive 71
- 5.4.4 Identify Enclosure 73
- 5.5 System Controls 75
- 5.5.4 SNMP Configuration 79
- 5.5.5 NTP Configuration 80
- 5.6 Information Menu 84
- 5.6.2 System Information 85
- 5.6.3 Hardware Monitor 86
- PART II proNAS System 95
- Chapter 7 Introduction 96
- Chapter 8 proNAS Manager 104
- 8.1 Volume Manager 105
- 8.1.3 Volume Snapshot 118
- 8.1.3.3 Delete Snapshots 124
- 8.1.4 Volume Replication 126
- 8.1.5 iSCSI 134
- 8.2 Network Manager 142
- 8.2.2 Internet Gateway 146
- 8.2.3 SNMP/MRTG 147
- 8.2.4 Network Test 148
- 8.3 Account Manager 149
- 8.3.1.3 NIS Authentication 152
- 8.4 Share Manager 161
- 8.4.1 Share Management 162
- 8.4.1.2 Applying ACL 163
- 8.4.1.3 Modifying a Share 163
- 8.4.1.4 Deleting a Share 164
- 8.4.3 Protocol Setting 167
- 8.4.3.2 NFS 168
- 8.4.4.1 Group 169
- 8.4.4.2 Account 170
- 8.4.4.3 IP Address 172
- 8.4.6 Duplication 179
- 8.4.7 Default Share 183
- 8.5 System Manager 184
- 8.5.3 Report tab 187
- 8.5.4 Time tab 188
- 8.5.5 Serial Ports tab 189
- 8.5.6 Power tab 190
- 8.5.7 Reboot tab 191
- 8.5.8 Service tab 192
- 8.5.9 Status tab 195
- 8.6 Backup Manager 197
- 8.6.3 Tape Control 204
- 7. Click “Save” again 207
- 8.7 Log Manager 221
- 8.8 Event Manager 222
- Event Purpose 223
- Chapter 9 File Manager 225
- 9.2 Logon to File Manager 227
- Chapter 10 proBackup 231
- 10.3 Create Backup Plan 234
- 10.4 Restore Backup 240
- 10.5 Account Detail 241
- 11.3 ProNAS HA Properties 254
- 11.6 License Registration 258
- 11.7 Event Log Properties 259
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