IBM C2B 2.25 Brick On Sled carrier 128-pin HPC - Manual (Page 9)

USER RESPONSIBLE F O R V E R I F Y I N G VERSION A N D COMPLETENESS
O E M F U N C T I O N A L SPECIFICATION ULTRASTAR X P (DFHC) SSA M O D E L S 1.12/2.25 GB - 1.0" H I G H
1.0 Description
1.1 Features
1.1.1 General Features
1.12/2.25/4.51 gigabytes formatted capacity (512 bytes/sector)
Serial Storage Architecture (SSA) attachment (dual port)
Brick On Sled carrier and 3.5" small form factor models
Rotary voice coil motor actuator
Closed-loop digital actuator servo (embedded sector servo)
Magnetoresistive (MR) heads
(0,8,6,infinity) 8/9 rate encoding
Partial Response Maximum Likelihood (PRML) data channel with digital filter
All mounting orientations supported
Jumperable auto spindle motor start
Jumperable write protection
Spindle synchronization
Two L E D drivers
Bezel (optional)
1.1.2 Performance Summary
Average read seek time (1.12 GB): 6.9 milliseconds
Average read seek time (2.25 GB): 7.5 milliseconds
Average read seek time (4.51GB): 8.0 milliseconds
Average Latency: 4.17 milliseconds
Split read/write control
Media data transfer rate: 9.59 to 12.58 MegaBytes/second (10 bands)
SSA data transfer rate: 20 Megabytes/second
1.1.3 Interface Controller Features
Multiple initiator support
Supports blocksizes from 256 to 5952 bytes
512K byte, multi-segmented, dual port data buffer
Read-ahead caching
Adaptive caching algorithms
Write Cache supported (write back & write thru)
Tagged command queuing
Command reordering
Back-to-back writes (merged writes)
Split reads and writes
Nearly contiguous read/write
Link error recovery procedure exit
Disable registration
Duplicate tags
Two byte U L P message codes
SCSI response
Move data transfer messages
Multiple ULP's
Automatic retry and data correction on read errors
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