APC RAID Subsystem SCSI-SATA II User Manual Page 76
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SAS / SATA II NAS System
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User’s Manual
HDD Read Ahead Cache:
This option allows the users to disable the cache of the HDDs on the RAID
subsystem. In some HDD models, disabling the cache in the HDD is necessary to
prove the RAID subsystem functions correctly.
Volume Data Read Ahead:
This option allows the users to set the Volume Data Read Ahead function. Options
are: Normal, Aggressive, Conservative, and Disabled.
HDD Queue Depth:
The queue depth is the number of I/O operations that can be run in parallel on a disk
drive. HDD Queue Depth options are 1, 2, 4, 8, 16, and 32.
Stagger Power On Control:
This option allows the RAID subsystem’s power supply to power up in succession
each HDD in the RAID subsystem. In the past, all the HDDs on the RAID subsystem
are powered up altogether at the same time. This function allows the power
transfer time (lag time) from the last HDD to the next one be set within the range of
0.4 to 6.0 seconds.
Spin Down Idle HDD (Minutes):
This option enables the hard drives to spin down after they become idle after a preset
period of time. Options are: Disabled, 1 (For Test), 3, 5, 10, 15, 20, 30, 40, and 60.
Disk Write Cache Mode:
The RAID subsystem supports Disk Write Cache Mode options: Auto, Enabled, and Disabled.
If the RAID subsystem has BBM (battery backup module), selecting the Auto option will
automatically enable Disk Write Cache. On the other hand, if there is no BBM, the Auto
option will disable Disk Write Cache.
Disk Capacity Truncation Mode:
The RAID subsystem use drive truncation so that drives from different vendors are
more likely to be able to be used as spares for each other. Drive truncation slightly
decreases the usable capacity of a drive that is used in redundant units. Options are:
Multiples Of 10G: If you have several 120GB drives from different vendors,
chances are that the capacity varies slightly. For example, one drive might be
121.1 GB, and the other 120.4 GB. This drive truncation mode makes the
121.1 GB and 120.4 GB drives same capacity as 120 GB so that one could
replace the other.
Multiples Of 1G: If you have 120 GB drives from different vendors, chances
are that the capacity varies slightly. For example, one drive might be 121.1
GB, and the other 121.4 GB. This drive truncation mode makes the 121.1 GB
and 121.4 GB drives same capacity 121 GB so that one could replace the other.
No Truncation:
The capacity of the disk drive is not truncated
.
- 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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