tape drive technology overview aitsaitsdltlto. tape drive recording technologies aitsaitsuperdltlto...
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Tape Drive Technology OverviewTape Drive Technology Overview
AIT SAIT SDLT LTO
Tape Drive Recording TechnologiesTape Drive Recording Technologies
AIT SAIT SuperDLT LTO
Recording style Helical Scan Helical Scan Linear serpentine
Linear serpentine
Cartridge style Dual Hub Single Hub Single Hub Single Hub
Tape width 8mm
(.320 inch)
.500 inch .500 inch .500 inch
Tape length 230 M
(690 feet)
600 M
(1,800 feet)
1,800 feet 1,800 feet
Servo System Timing based Timing based Optical Magnetic servo tracks
AIT DLT/S-DLT/LTO/SAIT/3480
Cartridge StylesCartridge Styles
Tape Pack8mm x 230m
Tape Pack½ inch x 600m
Dual HubsSingle
Hub
Shell 3.8”x2.5”x.600”
Shell 4.08”x4.2”x.860”Although the media may look the same physically, because of differences in magnetic formulation between the different formats the media will not work interchangeably between different major product families
Although LTO and DLT media look similar they are actually slightly different sizes and have different mechanical features just as other media types 3480 and SAIT
Linear RecordingLinear Recording
Tape SupplyReel
TapeTake up
Reel
Recording Head
BOT EOT
Tape Motion
Tape moves between120-200 Inches per second past the head
Linear RecordingLinear Recording
Tape Take up
Reel
TapeSupplyReel
Recording Head
Tape Motion
Head steps down to write new track
BOT EOT
Linear RecordingLinear Recording
Tape SupplyReel
TapeTake up
Reel
Recording Head
Tape Motion
BOT EOTHead steps down to write new track
Linear RecordingLinear Recording
Tape Take up
Reel
TapeSupplyReel
Recording Head
Tape Motion
BOT EOT
Head steps up to write new track
Helical RecordingHelical Recording
Tape SupplyReel
TapeTake up
Reel
Recording HeadBOT EOT
Rotating head is skewed at angle and rotates at 4000-6000 RPM
Tape Motion
Tape moves between2-6 Inches per second past the head
Helical RecordingHelical Recording
Tape SupplyReel
TapeTake up
Reel
Recording HeadBOT EOT
Rotating head is skewed at angle and rotates at 4000-6000 RPM
Tape Motion
Tape moves between2-6 Inches per second past the head
These helical tracks are called stripes
Tape Mechanism Helical ScanTape Mechanism Helical Scan
3D Top View Top View
Rotating Head
Cartridge
Take Up Reel
Tape Mechanism Linear ScanTape Mechanism Linear Scan
3D Top View 2D Top View
Fixed Head
Cartridge
Take Up Reel
Current Tape Technology Flagship ProductsCurrent Tape Technology Flagship Products
Native Capacity 100 GB 500 GB 160 GB 200 GB
Compressed Capacity 260 GB 1.3 TB 320 GB 400 GB
Native Transfer Rate 12 MB/s 30 MB/s 16 MB/s 35 MB/s
Compressed Transfer Rate 31 MB/s 78 MB/s 32 MB/s 70 MB/s
Load Time 10s 23s 12s 15s
Average Seek Time 27s 70s 70s 46s
Max. Rewind Time <105s 40s 140s 80s
Unload Time <24s <23s 12s 15S
Data Rate Matching No No No Yes
Buffer Size 18 MB 72 MB 64 MB 64 MB
MIC/MAM Yes Yes No Yes
AIT - 3 SAIT - 1 SDLT 320 LTO 2
Current Tape Technology Flagship ProductsCurrent Tape Technology Flagship Products
Error Rate Less than 10-17 bits Less than 10-17 bits Less than 10-17 bits Less than 10-17 bits
WORM Functionality Yes Q4 2003 No No
Mechanism MTBF 400,000 @ 100% Duty Cycle
500,000 @ 100% Duty Cycle
250,000 @ 100% Duty Cycle
250,000 @ 100% Duty Cycle
Head MTBF 50,000 tape contact hours
50,000 tape contact hours
30,000 hours TBS
Library Drive MSRP $5,600 $15,900 $6,800 $8,500
Media MSRP $125 $250 $160 $160
Cost for 1st 1 TB of Storage* $6,850 $16,400 $7,760 $9,300
Cost for 10 TB of Storage** $18,100 $20,900 $16,800 $16,500
Cost for 50 TB of Storage*** $68,100 $40,900 $56,800 $48,500
AIT - 3 SAIT - 1 SDLT 320 LTO 2
*Library tape drive + enough media to provide 1 TB of native storage capacity**Library tape drive + enough Media to provide 10 TB of native storage capacity ***Library tape drive + enough Media to provide 50 TB of native storage capacity
Tape Technology Road MapsTape Technology Road Maps
Year 2003 2004 2005 2006 2007 2008 2009
AIT Roadmap
SAIT Roadmap
SDLT Roadmap
LTO Roadmap
AIT-5400 GB48 MB/s
AIT-6800 GB96 MB/s
SAIT-1500 GB30 MB/s
SAIT-44 TB
240 MB/s
AIT-4200 GB24 MB/s
SDLT 600300 GB32 MB/s
SDLT 1200600 GB80 MB/s
SAIT-21 TB
60 MB/s
LTO 3400 GB80 MB/s
SAIT-32 TB
120 MB/s
SDLT 24001.2 TB
80 MB/s
LTO 4800 GB
160 MB/s
All specifications native capacity and performance
Library Capacity/Performance EnvelopeLibrary Capacity/Performance Envelope
Year 2002 2003 2004 2005 2006 2007 2008
TLS 4000
TLS 5000
TLS 6000
TLS 8000
5.6 TB-240 TB316GB/hr-1.9 TB/hr
11.2 TB-480 TB632GB/hr-3.8 TB/hr
16.5 TB-132 TB432GB/hr-864 GB/hr
132TB-1.05 PB3.4 TB/hr-6.8 TB/hr
2009
2.8 TB-120 TB158 GB/hr-950GB/hr
3 TB-72 TB230GB/hr-920 GB/hr
6 TB-144 TB460GB/hr-1.84 TB/hr
1.4 TB-60 TB79 GB/hr-475 GB/hr
1.6 TB-34 TB115GB/hr-460 GB/hr
2.2 TB-53 TB108GB/hr-864 GB/hr
33 TB-264 TB864GB/hr-1.7 TB/hr
4.4 TB-106 TB216GB/hr-1.7 TB/hr
66TB-528 TB1.7 TB/hr-3.4 TB/hr
12 TB-288 TB920GB/hr-3.68 TB/hr
8.8 TB-212 TB432GB/hr-3.4 TB/hr
AIT Technology HighlightsAIT Technology Highlights3.5” FF
Small form factor of drives and media leads to a higher storage density per given library
Helical scan recording provides high density and ability to accommodate varying transfer rates
MIC
Shortens load time
Search Map for High-Speed Search reduces
overall Access Time
Stores System Log (Redundant)
WORM functionality keying
AME Tape
Technology eliminates traditional binders
providing superior durability
High magnetic output enables high density
products
WORM Media
Low cost WORM functionality out paces MO
Meets SEC 17 CFR ' 241.17a-4 requirements
30 Year Archival storage life
SAIT Technology HighlightsSAIT Technology HighlightsSAIT
500 TB per cartridge capacity native
Helical scan recording provides high density and ability to accommodate varying transfer rates
ALDC compression typically provides 2.6:1 data compression
RMIC
Shortens load time
Search Map for high-speed search
reduces overall access time
Stores System Log (Redundant)
WORM functionality keying
FrontFront RearRear
Air Flow
Sealed Deck
PWB
SAIT Controlled Airflow
Improves reliability
Contamination protection for mechanics
Effective cooling of electronics
Dual Mode Tape Path
Tape is un-wrapped from drum for:
–Fast Forward/rewind
–High speed search w/RMIC
Maximum rewind speed of 551 IPS provides a maximum rewind time of 40 seconds
SDLT Technology HighlightsSDLT Technology Highlights
SDLT Modular Architecture
Five major modules simplify service and improve reliability
Power loading designed for automation use
POSITIVE BUCKLE
Positive engagement and ‘lock” prevents dropped leaders
Backward compatible with previous tape IV style media
AMP MEDIA
Back coat layer
with servo guides
High coercivitymagnetic layer
Under layerEnhanced base film layer
High performance magnetic coating provides long term storage performance
Optical Guidance Tracks
Laser/OpticsMagnetic Data
Tracks
Pivoting Optical
Servo
Advanced MR Cluster Head
POS
Optical servo track on backside of tape preserves 100% of recording surface for data
Optical servo track is indelible-tape can be bulk erased and reused
LTO Technology HighlightsLTO Technology HighlightsLTO-2 Drive
Adaptive threading and soft load interlock
eliminate problems associated with cartridge miss-
loading
High durability mechanism designed for
automation service duty
Adaptive data rate matching provides full speed to
half speed data rate matching in 1/8 step increments
Dual Actuator Head
Provides high resolution servo tracking
improving data reliability
Superior shock and vibration performance
compared to other drive technologies
Surface Control Guiding
Surface Control Guiding eliminates traditional edge
guiding techniques providing greater media durability
Reduces debris generation and insensitive to tape edge
quality or pack dynamics
LTO-CM
LTO-CM manufacturing information–Cartridge initialization information
•Tape directory,Cartridge information•Pass history,Error history,Usage,Tape Alert flags
Search Map for High-Speed Search reduces overall
Access Time
Stores System Log (Redundant)
WORM functionality keying