Drive Capacity Dave Anderson
Drive Capacity Dave Anderson. Presentation Title Month ##, 2002 Page 2 © Seagate Confidential What hardware technology concerns you least Hard drives.
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Drive Capacity
Dave Anderson
Presentation Title
Month ##, 2002 Page 2
© Seagate Confidential
What hardware technology concerns you least
Hard drives delivering sufficient capacity
Hard drive technology will be able to support huge capacities
More cost effective to have multiple copies
Presentation Title
Month ##, 2002 Page 3
© Seagate Confidential
Perpendicular Products in 2006
Product Name
Application Disc Diameter
(in.)
Areal Density (Gb/In2)
Linear Density (Kbpi)
Track Density (Ktpi)
Drive Capacity
(GB)
Disc Capacity
(GB)
ST1.3 Handheld 1 133 940 140 12 12
Barracuda 7200.10
Consumer 3.5 133.3 939 142 750 187.5
Momentus 5400.3
Notebook 2.5 130.5 870 150 160 80
Cheetah 15K.5
Enterprise 3.5 108 865 125 300 75
Presentation Title
Month ##, 2002 Page 4
© Seagate Confidential
HDD Technology Trend3.5 inch Consumer 2006 2009 2013
Drive Capacity (GB) 750 2,000 8,000
Number of Discs 4 3 3
Capacity (GB/disc) 187 670 2,670
Product Areal Density (Gbpsi) 133 500 1,800
Transfer Rate (Mb/sec) 930 2,000 5,000
RPM 7,200 7,200 10,000
Read Seek Time (ms) 8 7.2 6.5
3.5 inch Enterprise 2006 2009 2013
Drive Capacity (GB) 300 600 2,400
Number of Discs 4 4 4
Capacity (GB/disc) 75 150 600
Product Areal Density (Gbpsi) 108 250 1,000
Transfer Rate (Mb/sec) 975 2,000 4,000
RPM 15,000 15,000 15,000
Read Seek Time (ms) 3.7 3.3 2.8
1.0 inch Handheld 2006 2009 2013
Drive Capacity (GB) 12 30 100
Number of Discs 1 1 1
Capacity (GB/disc) 12 30 100
Product Areal Density (Gbpsi) 133 300 1,200
Transfer Rate (Mb/sec) 145 200 600
RPM 3,600 4,200 5,400
Read Seek Time (ms) 16 14.5 13.1
Object based Storage Devices (OSD)
Dave Anderson
Presentation Title
Month ##, 2002 Page 6
© Seagate Confidential
Hardware technology being developed that will reduce concern
OSD: being designed specifically for archive market
Ultimately management is OSD’s greatest value
Drive empowered to participate data management
• Attributes on objects guide automatic management• RAID level • Performance location (outer zone of HDD, striped, etc)
Other, future possibilities• Self-move data from one device to another• Defragment files transparently• Compress data• Future: optimize data to application (index I-frames, Mpeg
decompression, etc)
Presentation Title
Month ##, 2002 Page 7
© Seagate Confidential
Hardware technology being developed that will reduce concern
File SystemUser Component
File SystemStorage Component
Applications
System Call Interface
Storage Device
Sector/LBA Interface
Block I/O Manager
OSD Interface
Storage Device
Block I/O Manager
File SystemStorage Component
CPU
Applications
File SystemUser Component
System Call Interface
CPU
Storage Device
Block I/O Manager
File SystemStorage Component
Storage Device
Block I/O Manager
File SystemStorage Component
Storage Device
Block I/O Manager
File SystemStorage Component
Storage Device
Block I/O Manager
File SystemStorage Component
Presentation Title
Month ##, 2002 Page 8
© Seagate Confidential
Able to do long sectors independent of infrastructure
Enables distinguishing data from unused space• Defects in unused space do not affect reliability• Can ignore unused space during background scan
Can Self-mirror critical data• OSD can replicate critical/highly used data• (Can also have a performance benefit)
In RAID, only rebuild actual data – not entire space
OSD Improves Drive Reliability
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