APC Snap Server 2200 Specifications Page 138
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124 Snap Server Administrator Guide
POSIX (Portable Operating System
Interface)
A set of standard operating system interfaces based on the
UNIX operating system. The need for standardization arose
because enterprises using computers wanted to develop
programs that could run on multiple platforms without the
need to recode. The Snap Server uses Extended POSIX
ACLs.
protocol A standardized set of rules that specifies the format, timing,
sequencing, and/or error checking for data transmissions.
public access share A share that allows all users read/write access to the file
system.
quota A limit on the amount of storage space on a volume that a
specific user or NIS group can consume.
RAID (redundant array of
independent disks)
A collection of disk drives that act together as a single
storage system. Different RAID types provide different levels
of data protection.
RAID 0 (Striped) Distributes data evenly among all disks in the array. This
technique, called data striping, results in fast access speeds
because it uses multiple physical devices to store the data.
However, RAID 0 offers no redundancy and does not accept
hot spares. If a single disk drive fails, every file in the RAID
is rendered unavailable.
RAID 1 (Mirrored) Stores data on one disk drive and copies it to another drive
in the RAID. A RAID 1 must contain at least two disk drives:
one for the data space and one for redundancy. Although
the data space in a RAID 1 can never be larger than a single
drive, some administrators prefer to add a third drive (either
as a hot spare or a member) for additional redundancy.
RAID 1 is the most secure method for storing mission-critical
data because there is no catastrophic data loss when a disk
fails. However, RAID 1 is the most expensive and least
efficient storage method.
RAID 5 (Striping with Parity) Distributes data evenly among all disks in the array, and
maintains parity information (error correction data) that
allows the system to recover from a single disk drive failure.
RAID 5 provides the best combination of performance,
usability, capacity, and data protection.
recurring snapshot A snapshot that runs at an administrator-specified time and
interval.
Term Definition
- Snap Server 1
- Administrator Guide 1
- ETRUST ANTIVIRUS 6
- Contents 7
- Documentation Feedback 11
- Audience and Purpose 11
- Service and Technical Support 11
- Tips and Cautions 12
- Typographical Conventions 12
- Finding More Information 13
- Administrative Overview 15
- GuardianOS Specifications 16
- Feature Specification 17
- New Features in this Release 19
- Snap Server Manager 19
- Launching Snap Server Manager 20
- Server Name 22
- Date/Time Settings 22
- Configuring an APC-Brand UPS 23
- SnapExtensions 24
- Add-On Features 25
- Chapter 2 27
- TCP/IP Options 28
- Configuring TCP/IP Settings 30
- Windows SMB Access 31
- Support for Windows (SMB) 32
- NFS Access 33
- Apple File Protocol Access 34
- FTP Access 35
- HTTP/HTTPS Access 36
- DHCP Server 36
- User & Group Management 37
- Local Users and Groups 38
- Windows Workgroup or Domain 39
- NIS Domain 41
- Storage Configuration & 43
- Expansion 43
- RAID Groups 45
- Local and Global Hot Spares 45
- RAID Management Tools 46
- Volumes 47
- Quotas 48
- Expansion Arrays 49
- The Snap Disk 10 50
- The Snap Disk 30SA 50
- The Snap Disk 32SA 51
- Status Devices 52
- The Enclosure Summary Screen 53
- Chapter 5 55
- Chapter 5 iSCSI Disks 43 57
- Share and File Access 59
- Components and Options 60
- SnapTree Functionality 61
- Creating Shares 62
- Share Access Behaviors 63
- The NFS Warning Message 64
- (Windows) 65
- Access Permissions 67
- Snapshots 69
- Scheduling Snapshots 70
- NDMP and Snapshots 70
- Snapshots and iSCSI Disks 70
- Adjusting Snapshot Pool Size 71
- Accessing Snapshots 72
- Chapter 7 Snapshots 59 73
- Disaster Recovery 75
- Backup Recommendations 77
- Pre-Restore Requirements 78
- Restore Recommendations 78
- Maintenance Mode 80
- CA eTrust Antivirus Software 83
- Antivirus Dependencies 84
- The Local Scanner View 86
- Defining Scan Jobs 87
- Running a Manual Scan Job 88
- Scheduling a Scan Job 88
- Signature Updates 89
- Download Now 91
- Alert Options 93
- The Move Directory 94
- Log View 95
- Troubleshooting Snap Servers 97
- The Meaning of LED Indicators 100
- Behavior 105
- System Reset Options 106
- Caution 107
- Networking Issues 109
- Miscellaneous Issues 113
- Phone Home Support 114
- Text Field Description 115
- Appendix K 117
- Pre-installation Tasks 119
- Errors Messages To Be Ignored 125
- •Recover — 129
- •Nsrretrieve — 129
- Glossary 131
- Term Definition 132
- Ter m Definition 133
- Chapter 12Symbols 143
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