Computer Drive User Manual
Table Of Contents
- 1.0 Scope 1
- 2.0 Standards, compliance and reference documents 3
- 3.0 General description 7
- 4.0 Performance characteristics 11
- 5.0 Reliability specifications 15
- 6.0 Physical/electrical specifications 23
- 6.1 AC power requirements 23
- 6.2 DC power requirements 23
- 6.3 Power dissipation 29
- 6.4 Environmental limits 32
- 6.4.1 Temperature 32
- 6.4.2 Relative humidity 32
- 6.4.3 Effective altitude (sea level) 33
- 6.4.4 Shock and vibration 33
- 6.4.5 Acoustics 35
- 6.4.6 Air cleanliness 35
- 6.4.7 Corrosive environment 35
- 6.4.8 European Union Restriction of Hazardous Substances (RoHS) Directive 36
- 6.4.9 China Restriction of Hazardous Substances (RoHS) Directive 36
- 6.4.10 Electromagnetic susceptibility 36
- 6.5 Mechanical specifications 37
- 7.0 Defect and error management 39
- 8.0 Installation 43
- 9.0 Interface requirements 47
- 9.1 FC-AL features 47
- 9.1.1 Fibre Channel link service frames 47
- 9.1.2 Fibre Channel task management functions 48
- 9.1.3 Fibre Channel task management responses 48
- 9.1.4 Fibre Channel port login 49
- 9.1.5 Fibre Channel port login accept 50
- 9.1.6 Fibre Channel Process Login 50
- 9.1.7 Fibre Channel Process Login Accept 51
- 9.1.8 Fibre Channel fabric login 51
- 9.1.9 Fibre Channel fabric accept login 52
- 9.1.10 Fibre Channel Arbitrated Loop options 53
- 9.2 Dual port support 53
- 9.3 SCSI commands supported 54
- 9.4 Miscellaneous operating features and conditions 63
- 9.5 FC-AL physical interface 64
- 9.5.1 Physical characteristics 64
- 9.5.2 Connector requirements 65
- 9.5.3 Electrical description 65
- 9.5.4 Pin descriptions 65
- 9.5.5 FC-AL transmitters and receivers 66
- 9.5.6 Power 67
- 9.5.7 Fault LED Out 67
- 9.5.8 Active LED Out 68
- 9.5.9 Enable port bypass signals 68
- 9.5.10 Motor start controls 68
- 9.5.11 SEL_6 through SEL_0 ID lines 69
- 9.5.12 Device control codes 71
- 9.6 Signal characteristics 71
- 9.1 FC-AL features 47
- 10.0 Seagate Technology support services 75
- 1.0 Scope
- 2.0 Standards, compliance and reference documents
- 3.0 General description
- 4.0 Performance characteristics
- 5.0 Reliability specifications
- 6.0 Physical/electrical specifications
- 6.1 AC power requirements
- 6.2 DC power requirements
- 6.3 Power dissipation
- 6.4 Environmental limits
- 6.4.1 Temperature
- 6.4.2 Relative humidity
- 6.4.3 Effective altitude (sea level)
- 6.4.4 Shock and vibration
- 6.4.5 Acoustics
- 6.4.6 Air cleanliness
- 6.4.7 Corrosive environment
- 6.4.8 European Union Restriction of Hazardous Substances (RoHS) Directive
- 6.4.9 China Restriction of Hazardous Substances (RoHS) Directive
- 6.4.10 Electromagnetic susceptibility
- 6.5 Mechanical specifications
- 7.0 Defect and error management
- 8.0 Installation
- 9.0 Interface requirements
- 9.1 FC-AL features
- 9.1.1 Fibre Channel link service frames
- 9.1.2 Fibre Channel task management functions
- 9.1.3 Fibre Channel task management responses
- 9.1.4 Fibre Channel port login
- 9.1.5 Fibre Channel port login accept
- 9.1.6 Fibre Channel Process Login
- 9.1.7 Fibre Channel Process Login Accept
- 9.1.8 Fibre Channel fabric login
- 9.1.9 Fibre Channel fabric accept login
- 9.1.10 Fibre Channel Arbitrated Loop options
- 9.2 Dual port support
- 9.3 SCSI commands supported
- 9.4 Miscellaneous operating features and conditions
- 9.5 FC-AL physical interface
- 9.5.1 Physical characteristics
- 9.5.2 Connector requirements
- 9.5.3 Electrical description
- 9.5.4 Pin descriptions
- 9.5.5 FC-AL transmitters and receivers
- 9.5.6 Power
- 9.5.7 Fault LED Out
- 9.5.8 Active LED Out
- 9.5.9 Enable port bypass signals
- 9.5.10 Motor start controls
- 9.5.11 SEL_6 through SEL_0 ID lines
- 9.5.12 Device control codes
- 9.6 Signal characteristics
- 9.1 FC-AL features
- 10.0 Seagate Technology support services
Cheetah NS 10K.2 FC Product Manual, Rev. B 39
7.0 Defect and error management
Seagate continues to use innovative technologies to manage defects and errors. These technologies are
designed to increase data integrity, perform drive self-maintenance, and validate proper drive operation.
SCSI defect and error management involves drive internal defect/error management and FC system error con-
siderations (errors in communications between the initiator and the drive). In addition, Seagate provides the
following technologies used to increase data integrity and drive reliability:
• Background Media Scan (see Section 7.4)
• Media Pre-Scan (see Section 7.5)
• Deferred Auto-Reallocation (see Section 7.6)
• Idle Read After Write (see Section 7.7)
The read error rates and specified storage capacities are not dependent on host (initiator) defect management
routines.
7.1 Drive internal defects/errors
During the initial drive format operation at the factory, media defects are identified, tagged as being unusable,
and their locations recorded on the drive primary defects list (referred to as the “P’ list and also as the ETF
defect list). At factory format time, these known defects are also reallocated, that is, reassigned to a new place
on the medium and the location listed in the defects reallocation table. The “P” list is not altered after factory
formatting. Locations of defects found and reallocated during error recovery procedures after drive shipment
are listed in the “G” list (defects growth list). The “P” and “G” lists may be referenced by the initiator using the
Read Defect Data command.
Details of the SCSI commands supported by the drive are described in the Fibre Channel Interface Manual.
Also, more information on the drive Error Recovery philosophy is presented in the Fibre Channel Interface
Manual.
7.2 Drive error recovery procedures
When an error occurs during drive operation, the drive, if programmed to do so, performs error recovery proce-
dures to attempt to recover the data. The error recovery procedures used depend on the options previously set
in the Error Recovery Parameters mode page. Error recovery and defect management may involve using sev-
eral SCSI commands described in the Fibre Channel Interface Manual. The drive implements selectable error
recovery time limits required in video applications.
The error recovery scheme supported by the drive provides a way to control the total error recovery time for the
entire command in addition to controlling the recovery level for a single LBA. The total amount of time spent in
error recovery for a command can be limited using the Recovery Time Limit bytes in the Error Recovery mode
page. The total amount of time spent in error recovery for a single LBA can be limited using the Read Retry
Count or Write Retry Count bytes in the Error Recovery mode page.