3.2 Storage Services

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Transcript 3.2 Storage Services

CompTIA Server+ Certification
(Exam SK0-004)
3.2 Storage Services
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Objectives
• Understand the use of
NAS and SAN to provide
network storage
solutions
• Identify the principal
components of Fibre
Channel
• Understand the
principles of storage
capacity planning
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Direct Attached Storage (DAS)
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Network Attached Storage (NAS)
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Storage Area Network (SAN)
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Fibre Channel (1)
• Transfer rates
o
1GFC (1 Gbps), 2GFC, 4GFC, 8GFC, and 16GFC
o
10GFC and 20GFC
• Initiator (host server)
• Target (device port)
o
LUN (Logical Unit Number)
o
WWN (World Wide Name)
o
WWPM (Word Wide Port Name)
• Fibre Channel Switch / Director
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Fibre Channel (2)
• Fibre Channel over IP (FCIP)
o
Remote link over WAN interfaces for interconnecting SANs
o
Not high performance
• Internet SCSI (iSCSI)
o
Deploy over ordinary Ethernet
o
Alternative to Fibre Channel hardware
• Fibre Channel over Ethernet (FCoE)
o
Mixed Ethernet / FC environment
o
Converged Network Adapters (CAN)
• Jumbo Frames
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Fibre Channel Security Issues
• LUN Masking
o
Access control based on WWN or WWPN
• Zoning
• Fibre Channel Security Protocols (FC-SP)
o
Diffie-Hellman Challenge Handshake Authentication Protocol
(DH-CHAP)
o
Fibre Channel Authentication Protocol (FCAP)
o
Encapsulating Security Protocol (ESP)
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Tape Drives
• Tape drive types
o
Quarter-Inch Cartridge (QIC)
o
Travan
o
o
o
Digital Audio Tape (DAT) /
Digital Data Storage (DDS)
8mm / Advanced Intelligent
Tape (AIT)
Digital Linear Tape (DLT) /
Linear Tape-Open (LTO) /
Ultrium
• Tape libraries /
autoloaders
• Maintenance
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Other Media
• Optical and WORM
o
CD/DVD recordable
o
CD / DVD Rewritable
• Optical jukebox
• Flash media
• Just a Bunch of Disks
(JBOD)
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Disc
CD-R
CD-RW
DVD±R
Type
Capacity
WORM
700 MB
Rewritable 700 MB
WORM
4.7 GB single layer
8.5 GB dual layer / single sided
9.4 GB single layer / double
sided
17.1 GB dual layer / double
sided
DVD±RW Rewritable 4.7 GB single layer
8.5 GB dual layer
BD-R
WORM
25 GB
BD-R XL WORM
100 GB triple layer
128 GB quad layer
BD-RE
Rewritable 25 GB
197
Storage Capacity Planning
• Server / appliance OS growth
• Application
o
Database records
o
User-generated content
• File server
• Temporary files
• Logs
• Backup / archive
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Disk Size Calculation
• Bytes (8 bits)
o
300,000,000,000 bytes is always 300,000,000,000 bytes but multiples vary
o
Base 10 measurements
− 300,000,000 kilobytes (KB)
− 300,000 megabytes (MB)
− 300 gigabytes (GB)
o
Base 2 measurements
− 292,968,750 kibibytes (KiB)
− 286102 mebibytes (MiB)
− 279.379 gibibytes (GiB)
• Understand which unit is being used in context
o
Windows uses base 2 calculations with base 10 labels
o
Some Linux versions use SI labels
o
OS X may use base 10 calculations
o
Storage vendors always use base 10 calculations
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Disk Quotas and Compression
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Review
• Understand the use of NAS
and SAN to provide
network storage solutions
• Identify the principal
components of Fibre
Channel
• Understand the principles
of storage capacity
planning
3.2 Storage Services
202