IBM C2B 2.25 Brick On Sled carrier 128-pin HPC - Manual (Page 70)

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
The spindle synchronization timing requirements are met in a string composed of Ultrastar XP SSA drives
when there are no more than seventeen drives between the one operating in Master Sync mode and the
furthest drive operating in Slave Sync mode.
5.7.5.2 Over Sync Hard-wire
There will be a single wire that connects all the drives together throught the SSA Option Port pin 3 (- Sync
pin). One of these drives will be a Master drive. Two potential configurations of this hard-wire connection
are shown in the following figures:
Figure 21. Two examples of Daisy-Chain Connection of Synchronization .
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