Determining The Number Of Units To Install; Determining Cable Length - Sun Microsystems StorEdge S1 Array Installation And Maintenance Manual

Determining the Number of Units to Install

If the arrays are installed on a LVD SCSI port on a host system or host bus adapter,
up to four Sun StorEdge S1 arrays can be installed.
The following limitations apply to the number of arrays that can be installed in the
the described situations:
If the SCSI port is single-ended, you can install no more than two Sun StorEdge
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S1 arrays on the SCSI chain.
When a single-ended device is on a SCSI chain, you can only install one Sun
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StorEdge S1 array on that chain.
For more information, see the following sections:
"Example: Single-Ended SCSI Configuration" on page 52
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"Example: LVD SCSI Configuration" on page 54
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"Example: Mixed Single-Ended and LVD SCSI Configuration" on page 55
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Determining Cable Length

The total length of cable that can be used for a Sun StorEdge S1 array daisy chain
depends on whether or not the host SCSI port or adapter is LVD SCSI or single-
ended SCSI.
If the SCSI port or adapter is LVD SCSI, the total LVD SCSI cable length cannot
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exceed 12 meters with maximum number (16) of LVD SCSI devices.
If the SCSI port or adapter is single-ended (SE) SCSI, the total SE SCSI cable
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length cannot exceed 3 meters.
24 Sun StorEdge S1 Array Installation and Maintenance Manual • April 2003